This page lists 95 electrical switch & relay parts for the 2018 GMC Acadia, across 28 part types, covering the 3.6L V6 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2018 GMC Acadia, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. 23 parts of the 95 listed are Oil Pressure Sender / Switch (9 parts), Power Window Switch (8 parts) and Starter Motor Control Relay (6 parts). The other 25 part types cover the remaining 72 parts.
The 2018 GMC Acadia came with a single engine, the 3.6L V6, and every part is verified against it.
16 brands supply electrical switch & relay parts for the 2018 GMC Acadia, led by GM GENUINE (36 parts), STANDARD MOTOR PRODUCTS (23 parts) and WELLS (14 parts), plus 13 more brands. Quality grades include Economy and Standard Replacement.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2018 GMC Acadia. 10 parts have it, including STANDARD MOTOR PRODUCTS CBS2443 (Dimmer Switch) and STANDARD MOTOR PRODUCTS RY116 (Ignition Relay). Each part number opens a page with every vehicle that part fits.
A/C Compressor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 13361778 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
This table covers the relays that control the A/C Compressor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 2018 GMC Acadia — ACDELCO 13361778.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 20915 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Switch | View on Amazon |
| GM GENUINE | 1551343 | 🇺🇸 US 🇨🇦 CA | without CircuitAir Conditioning SEN For LFY/LGX Must be Ordered with Corresponding Harn Assembly-Engine wiring harness Extn When Engine Harn has Oval Conn. | View on Amazon |
| UAC | SW10093C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Transducer | View on Amazon |
| WELLS | 1S8929 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Clutch Cycle and Fan ControlCut-Off | View on Amazon |
This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
4 A/C Refrigerant Pressure Switch parts are listed for the 2018 GMC Acadia, from FOUR SEASONS, GM GENUINE, UAC and 1 other brand.
This group includes FOUR SEASONS 20915, GM GENUINE 1551343 and UAC SW10093C and the remaining parts above.
A/C System Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UAC | RE1008C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the relays that control the A/C System circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 2018 GMC Acadia — UAC RE1008C.
Brake Light Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA | CE1322627 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| VEMO | V51730194 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Stop Light Switch, 3 Pins | View on Amazon |
This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
2 Brake Light Switch parts are listed for the 2018 GMC Acadia, from AUTOTECNICA and VEMO.
Part numbers include AUTOTECNICA CE1322627 and VEMO V51730194.
Brake Pressure Warning Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 23139898 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Brake Pressure Warning switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
This group shows a single part: GM GENUINE 23139898.
Cruise Control Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 23360936 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 23360937 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 23360938 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| WELLS | 1S16801 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LeftBlack | View on Amazon |
| WELLS | 1S16800 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LeftBlack | View on Amazon |
This table covers the Cruise Control switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 Cruise Control Switch parts for the 2018 GMC Acadia come from 2 brands — GM GENUINE and WELLS.
Listed part numbers: GM GENUINE 23360936, GM GENUINE 23360937 and GM GENUINE 23360938, plus the other parts above.
Dimmer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | CBS2443 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Automatic High Beamwith Fog Lights | View on Amazon |
| GM GENUINE | 23474576 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| STANDARD MOTOR PRODUCTS | CBS2442 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Fog Lightswith Automatic High Beam | View on Amazon |
| STANDARD MOTOR PRODUCTS | CBS2444 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Fog Lightswithout Automatic High Beam | View on Amazon |
| WELLS | 1S17699 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Automatic High Beam | View on Amazon |
This table covers the dimmer switches that select headlamp high and low beam. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 Dimmer Switch parts for the 2018 GMC Acadia come from 3 brands — STANDARD MOTOR PRODUCTS, GM GENUINE and WELLS. The "Popular" part is STANDARD MOTOR PRODUCTS CBS2443.
This group includes STANDARD MOTOR PRODUCTS CBS2443, GM GENUINE 23474576 and STANDARD MOTOR PRODUCTS CBS2442 and the remaining parts above.
Door Lock Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 87869504 | 🇺🇸 US 🇨🇦 CA | LeftJet Black | View on Amazon |
| GM GENUINE | 87869505 | 🇺🇸 US 🇨🇦 CA | RightJet Black | View on Amazon |
| STANDARD MOTOR PRODUCTS | DS1911 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Front Leftor Position Switch | View on Amazon |
This table covers the Door Lock switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
3 Door Lock Switch parts are listed for the 2018 GMC Acadia, from GM GENUINE and STANDARD MOTOR PRODUCTS.
This group includes GM GENUINE 87869504, GM GENUINE 87869505 and STANDARD MOTOR PRODUCTS DS1911.
Electronic Suspension Control Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 84215190 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 84215192 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 84215193 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 84215194 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE | 84215196 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
This table covers the Electronic Suspension Control switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 Electronic Suspension Control Switch parts for the 2018 GMC Acadia come from GM GENUINE.
Listed part numbers: GM GENUINE 84215190, GM GENUINE 84215192 and GM GENUINE 84215193, plus the other parts above.
Engine Control Module Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 13455283 | 🇺🇸 US 🇨🇦 CA | Fits NORTH AMERICA (MAH), MIDDLE EAST (MAM), CANADA (MBC), MEXICO (MCX) | View on Amazon |
This table covers the relays that control the Engine Control Module circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
This group shows a single part: GM GENUINE 13455283.
Hazard Warning Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 23168379 | 🇺🇸 US 🇨🇦 CA | JET BLACK | View on Amazon |
| WELLS | 1S18104 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Hazard Warning switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
2 Hazard Warning Switch parts for the 2018 GMC Acadia come from 2 brands — GM GENUINE and WELLS.
This group includes GM GENUINE 23168379 and WELLS 1S18104.
Headlamp Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 13455283 | 🇺🇸 US 🇨🇦 CA | Fits Low BeamNorth America (MAH), Middle East (MAM), Canada (MBC), Mexico (MCX) | View on Amazon |
This table covers the relays that control the Headlamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 2018 GMC Acadia — GM GENUINE 13455283.
Headlamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | CBS2443 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Automatic High Beamwith Fog Lights | View on Amazon |
| STANDARD MOTOR PRODUCTS | CBS2442 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Fog Lightswith Automatic High Beam | View on Amazon |
| STANDARD MOTOR PRODUCTS | CBS2444 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Fog Lightswithout Automatic High Beam | View on Amazon |
| WELLS | 1S17699 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Automatic High Beam | View on Amazon |
This table covers the column or dash switches that control the exterior lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
4 Headlamp Switch parts for the 2018 GMC Acadia come from 2 brands — STANDARD MOTOR PRODUCTS and WELLS.
Part numbers include STANDARD MOTOR PRODUCTS CBS2443, STANDARD MOTOR PRODUCTS CBS2442 and STANDARD MOTOR PRODUCTS CBS2444, among others listed above.
Ignition Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | RY116 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Quantity: 1Mounting Bracket Included: No | View on Amazon |
| GM GENUINE | 13468935 | 🇺🇸 US 🇨🇦 CA | ELECTRONIC, 5 BLADEELECTRONIC RELAY ISO MINI SPDT | View on Amazon |
| ROSTRA | 600300 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: SquareTerminal Type: Blade | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY116T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-SeriesConnector Shape: Square | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY1957 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Terminal Gender: MaleMale | View on Amazon |
This table covers the relays that control the Ignition circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
5 Ignition Relay parts for the 2018 GMC Acadia come from 3 brands — STANDARD MOTOR PRODUCTS, GM GENUINE and ROSTRA. The "Popular" part is STANDARD MOTOR PRODUCTS RY116.
Listed part numbers: STANDARD MOTOR PRODUCTS RY116, GM GENUINE 13468935 and ROSTRA 600300, plus the other parts above.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 23400951 | 🇺🇸 US 🇨🇦 CA | Mounting Hardware Included: NoBlack | View on Amazon |
| STANDARD MOTOR PRODUCTS | US1359 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Console Mounted | View on Amazon |
| WELLS | 1S16736 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Push Button SwitchBlack | View on Amazon |
This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
3 Ignition Starter Switch parts for the 2018 GMC Acadia come from 3 brands — GM GENUINE, STANDARD MOTOR PRODUCTS and WELLS.
Part numbers include GM GENUINE 23400951, STANDARD MOTOR PRODUCTS US1359 and WELLS 1S16736.
Liftgate Close Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | D1488G | 🇺🇸 US 🇨🇦 CA | Fits Denaliwith Power Lift Gate (TB5), Hands Free Power Lift Gate (TC2), Interior Trim Color (4B8) | View on Amazon |
This table covers the Liftgate Close switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
This group shows a single part: GM GENUINE D1488G.
Neutral Safety Switch / Range Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 511110 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 670597 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ROSTRA | 501182 | 🇺🇸 US 🇨🇦 CA | Trans. code 6T50MLPS | View on Amazon |
| WELLS | 1S12274 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Neutral Safety Switch / Range sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
4 Neutral Safety Switch / Range Sensor parts are listed for the 2018 GMC Acadia, from ROSTRA, DORMAN and WELLS.
In the Economy grade, DORMAN supplies 1 part: the catalog's value-priced group. A representative part number is DORMAN 511110.
The Standard Replacement section lists 3 options from ROSTRA and WELLS — built to original-equipment specification. ROSTRA 670597 is listed in this group.
Listed part numbers: DORMAN 511110, ROSTRA 670597 and ROSTRA 501182, plus the other parts above.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA Popular | GM1317756 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Material: Aluminum | View on Amazon |
| DORMAN | 926397 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 3 Way with Leadswith Flat Connector | View on Amazon |
| HOLSTEIN | 2OPS0020 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| UNITED MOTOR PRODUCTS | OPS322 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| WALKER PRODUCTS | 2561004 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Seal | View on Amazon |
| WALKER PRODUCTS | 2561003 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Round Connector | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Popular | 1S12693 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Gender: Female | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS623 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Rectangle, OvalSensor Only | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 1815461 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Flat 3 Pin Connector | View on Amazon |
This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.
9 Oil Pressure Sender / Switch parts are listed for the 2018 GMC Acadia, from WALKER PRODUCTS, AUTOTECNICA, DORMAN and 5 other brands. AUTOTECNICA GM1317756 carries the "Popular" badge.
Economy: 6 parts, from WALKER PRODUCTS, AUTOTECNICA, DORMAN and 2 other brands. A representative part number is AUTOTECNICA GM1317756.
The Standard Replacement section: 2 options from WELLS and STANDARD MOTOR PRODUCTS. WELLS 1S12693 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Part numbers include AUTOTECNICA GM1317756, DORMAN 926397 and HOLSTEIN 2OPS0020, among others listed above.
Parking Brake Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 85618948 | 🇺🇸 US 🇨🇦 CA | Switch Mounting Type: Snap In | View on Amazon |
This table covers the Parking Brake switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
One part is listed for the 2018 GMC Acadia — GM GENUINE 85618948.
Power Seat Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA | GM1322316 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Left8 Way Adjustment | View on Amazon |
| DORMAN | 901271 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Left8 Way Adjustment | View on Amazon |
| SKP | SKPSW147 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Front LeftFront Rightor with Power | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA Popular | 662584 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Left8 Way Adjustment | View on Amazon |
| STANDARD MOTOR PRODUCTS | PSW149 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Rectangle | View on Amazon |
This table covers the Power Seat switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 Power Seat Switch parts for the 2018 GMC Acadia come from 5 brands — AUTOTECNICA, DORMAN, SKP and 2 other brands. The "Popular" part is ROSTRA 662584.
The Economy section: 3 options from AUTOTECNICA, DORMAN and SKP. AUTOTECNICA GM1322316 is listed in this group.
Standard Replacement: 2 parts, from ROSTRA and STANDARD MOTOR PRODUCTS. A representative part number is ROSTRA 662584.
This group includes ROSTRA 662584, AUTOTECNICA GM1322316 and DORMAN 901271 and the remaining parts above.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | 85694267 | 🇺🇸 US 🇨🇦 CA | RearJET BLACK | View on Amazon |
| GM GENUINE Popular | 84512940 | 🇺🇸 US 🇨🇦 CA | Fits Front LeftSLT Model | View on Amazon |
| GM GENUINE | 85694269 | 🇺🇸 US 🇨🇦 CA | Fits Front RightSLT Model | View on Amazon |
| GM GENUINE | 85694265 | 🇺🇸 US 🇨🇦 CA | Fits Front LeftSLT Model | View on Amazon |
| STANDARD MOTOR PRODUCTS | DWS2048 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | View on Amazon |
| STANDARD MOTOR PRODUCTS | DWS2050 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Terminal Type: Blade and Pin | View on Amazon |
| WELLS | 1S15757 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | View on Amazon |
| WELLS | 1S15776 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Leftwithout One-Touch Open Windows | View on Amazon |
This table covers the switches that command each window motor. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
8 Power Window Switch parts are listed for the 2018 GMC Acadia, from GM GENUINE, STANDARD MOTOR PRODUCTS and WELLS. GM GENUINE 85694267 carries the "Popular" badge.
Listed part numbers: GM GENUINE 85694267, GM GENUINE 84512940 and GM GENUINE 85694269, plus the other parts above.
Radiator Fan Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332581 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 5-Pin ConnectorColor: Black | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY232 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Amperage Rating: 35 AConnector Gender: Male | View on Amazon |
This table covers the relays that control the Radiator Fan circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
2 Radiator Fan Relay parts for the 2018 GMC Acadia come from 2 brands — HELLA and STANDARD MOTOR PRODUCTS.
Listed part numbers: HELLA 933332581 and STANDARD MOTOR PRODUCTS RY232.
Starter Motor Control Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | RY265T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | RY265 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: SquareFunctions: Relay | View on Amazon |
| GM GENUINE | 13468934 | 🇺🇸 US 🇨🇦 CA | Fits 4-Terminal 630 Series Single Pole Double Throw MiniFrom Block Assembly | View on Amazon |
| GM GENUINE | 13455283 | 🇺🇸 US 🇨🇦 CA | Fits North America (MAH), Middle East (MAM), Canada (MBC), Mexico (MCX)Accessoryor SLE Model | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY1991 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Multi-Function Relay | View on Amazon |
| WELLS | 1R3545 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Gender: MaleMounting Hardware Included: No | View on Amazon |
This table covers the relays that control the Starter Motor Control circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
6 Starter Motor Control Relay parts for the 2018 GMC Acadia come from 3 brands — STANDARD MOTOR PRODUCTS, GM GENUINE and WELLS. The "Popular" part is STANDARD MOTOR PRODUCTS RY265T.
Part numbers include STANDARD MOTOR PRODUCTS RY265T, STANDARD MOTOR PRODUCTS RY265 and GM GENUINE 13468934, among others listed above.
Steering Wheel Audio Control Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 23134240 | 🇺🇸 US 🇨🇦 CA | Fits LeftDenali | View on Amazon |
| GM GENUINE | 23134239 | 🇺🇸 US 🇨🇦 CA | Fits RightSLE Model or SLT Model | View on Amazon |
| WELLS | 1S16639 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Black | View on Amazon |
This table covers the Steering Wheel Audio Control switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
3 Steering Wheel Audio Control Switch parts are listed for the 2018 GMC Acadia, from GM GENUINE and WELLS.
Part numbers include GM GENUINE 23134240, GM GENUINE 23134239 and WELLS 1S16639.
Trunk Lid / Tailgate Release Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 86270094 | 🇺🇸 US 🇨🇦 CA | RearLabeled 86270094 | View on Amazon |
| GM GENUINE | 84389158 | 🇺🇸 US 🇨🇦 CA | Fits SLT ModelJET BLACK | View on Amazon |
This table covers the Trunk Lid / Tailgate Release switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
2 Trunk Lid / Tailgate Release Switch parts for the 2018 GMC Acadia come from GM GENUINE.
Part numbers include GM GENUINE 86270094 and GM GENUINE 84389158.
Turn Signal Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | 84651413 | 🇺🇸 US 🇨🇦 CA | SLE Model or SLT ModelProjection Fog Lamp (T3Y) | View on Amazon |
| GM GENUINE | 84651414 | 🇺🇸 US 🇨🇦 CA | Denali or SLT ModelFront FOG AND AHB | View on Amazon |
| STANDARD MOTOR PRODUCTS | CBS2443 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Automatic High Beamwith Fog Lights | View on Amazon |
| STANDARD MOTOR PRODUCTS | CBS2442 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Fog Lightswith Automatic High Beam | View on Amazon |
| STANDARD MOTOR PRODUCTS | CBS2444 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Fog Lightswithout Automatic High Beam | View on Amazon |
This table covers the combination / turn-signal switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 Turn Signal Switch parts are listed for the 2018 GMC Acadia, from STANDARD MOTOR PRODUCTS and GM GENUINE. GM GENUINE 84651413 carries the "Popular" badge.
Listed part numbers: GM GENUINE 84651413, GM GENUINE 84651414 and STANDARD MOTOR PRODUCTS CBS2443, plus the other parts above.
Wiper / Washer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 84649240 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | WP674 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Black | View on Amazon |
| WELLS | 1S16806 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Wiper / Washer switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
3 Wiper / Washer Switch parts for the 2018 GMC Acadia come from 3 brands — GM GENUINE, STANDARD MOTOR PRODUCTS and WELLS.
Part numbers include GM GENUINE 84649240, STANDARD MOTOR PRODUCTS WP674 and WELLS 1S16806.
Wiring Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 13468935 | 🇺🇸 US 🇨🇦 CA | ELECTRONIC, 5 BLADEELECTRONIC RELAY ISO MINI SPDT | View on Amazon |
| GM GENUINE | 13468934 | 🇺🇸 US 🇨🇦 CA | North America (MAH), Middle East (MAM), Canada (MBC), Mexico (MCX)4-Terminal 630 Series Single Pole Double Throw Mini | View on Amazon |
| GM GENUINE | D1780C | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
This table covers the relays that control the Wiring circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
GM GENUINE supplies the 3 Wiring Relay parts for the 2018 GMC Acadia.
Part numbers include GM GENUINE 13468935, GM GENUINE 13468934 and GM GENUINE D1780C.
Buying Electrical Switch & Relay Parts for a 2018 GMC Acadia
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 3.6L V6 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil Pressure Sender / Switch and Power Window Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2018 GMC Acadia?
Our catalog currently lists 95 electrical switch & relay parts for the 2018 GMC Acadia across 28 subcategories and 16 brands, covering the 3.6L V6 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2018 GMC Acadia?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2018 GMC Acadia was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2018 GMC Acadia?
Every part on this page is matched to the 3.6L V6 engine. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 GMC Acadia
Electrical Switch & Relay Parts for Other GMC Acadia Years
Switch vehicle or jump to a subcategory
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.