The 2018 Cadillac CT6 has 50 electrical connector parts with verified fitment on this page — 15 part types and 11 brands, covering all 4 engine options (2.0L L4 ELECTRIC/GAS Turbocharged, 2.0L L4 Turbocharged, 3.0L V6 Turbocharged and 3.6L V6). Each part includes a manufacturer part number and application notes.
On the 2018 Cadillac CT6, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. 29 parts of the 50 listed are Body Wiring Harness / Connector (16 parts), Camshaft Position Sensor Connector (7 parts) and ABS Wheel Speed Sensor Connector (6 parts). The other 12 part types cover the remaining 21 parts.
The 2018 Cadillac CT6 was sold with 4 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2018 Cadillac CT6 electrical connector parts are GM GENUINE (20 parts), STANDARD MOTOR PRODUCTS (12 parts) and ACDELCO (5 parts), plus 8 more brands.
9 parts on this 2018 Cadillac CT6 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS HP3945 (ABS Wheel Speed Sensor Connector) and GM GENUINE PT146 (Body Wiring Harness / Connector). Click any part number to see every vehicle that part fits.
A/C Compressor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT3702 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
This table covers the harness connectors at the A/C Compressor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Cadillac CT6 — GM GENUINE PT3702.
A/C Refrigerant Pressure Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 37236 | 🇺🇸 US 🇨🇦 CA | 3 Terminal Male | View on Amazon |
| ROSTRA Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 610225 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the harness connectors at the A/C Refrigerant Pressure Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 A/C Refrigerant Pressure Switch Connector parts for the 2018 Cadillac CT6 come from 2 brands — FOUR SEASONS and ROSTRA.
Part numbers include FOUR SEASONS 37236 and ROSTRA 610225.
ABS Wheel Speed Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | HP3945 | 🇺🇸 US 🇨🇦 CA | HandypackConnector Shape: Square | View on Amazon |
| WELLS Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 1P1344 | 🇺🇸 US 🇨🇦 CA | Terminal Type: BladeWiring Harness Length: 8.5 In | View on Amazon |
| ACDELCO Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2160 | 🇺🇸 US 🇨🇦 CA | GoldShape: Square | View on Amazon |
| HOLSTEIN Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 2HAR0035 | 🇺🇸 US 🇨🇦 CA | Includes ABS Wheel Speed Sensor Wire Harness | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S824 | 🇺🇸 US 🇨🇦 CA | Connector Shape: SquareHarness Length | View on Amazon |
| ULTRA-POWER Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 1P2321 | 🇺🇸 US 🇨🇦 CA | ABS ConnectorFront | View on Amazon |
This table covers the harness connectors at each ABS wheel-speed sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
6 ABS Wheel Speed Sensor Connector parts are listed for the 2018 Cadillac CT6, from STANDARD MOTOR PRODUCTS, WELLS, ACDELCO and 2 other brands. STANDARD MOTOR PRODUCTS HP3945 carries the "Popular" badge.
Listed part numbers: STANDARD MOTOR PRODUCTS HP3945, WELLS 1P1344 and ACDELCO PT2160, plus the other parts above.
Accelerator Pedal Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S1478 | 🇺🇸 US 🇨🇦 CA | Connector Shape: Rectangle | View on Amazon |
This table covers the harness connectors at the Accelerator Pedal Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Cadillac CT6 — STANDARD MOTOR PRODUCTS S1478.
Air Intake / Charge Temperature Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 84677313 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S2813 | 🇺🇸 US 🇨🇦 CA | Intake Air | View on Amazon |
This table covers the harness connectors at the Air Intake / Charge Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Air Intake / Charge Temperature Sensor Connector parts for the 2018 Cadillac CT6 come from 2 brands — GM GENUINE and STANDARD MOTOR PRODUCTS.
This group includes GM GENUINE 84677313 and STANDARD MOTOR PRODUCTS S2813.
Alternator / Generator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 84941154 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2971 | 🇺🇸 US 🇨🇦 CA | Gender: MaleTerminal Type: Blade | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S1477 | 🇺🇸 US 🇨🇦 CA | without Wiring Harness | View on Amazon |
This table covers the harness connectors at the Alternator / Generator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
3 Alternator / Generator Connector parts are listed for the 2018 Cadillac CT6, from ACDELCO, GM GENUINE and STANDARD MOTOR PRODUCTS.
This group includes ACDELCO 84941154, GM GENUINE PT2971 and STANDARD MOTOR PRODUCTS S1477.
Ambient Air Temperature Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S2860 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalGauge: 16 Gauge | View on Amazon |
This table covers the harness connectors at the Ambient Air Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Cadillac CT6 — STANDARD MOTOR PRODUCTS S2860.
Barometric Pressure Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 645325 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
This table covers the harness connectors at the Barometric Pressure Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: DORMAN 645325.
Blower Motor Control Module / Resistor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 1712767 | 🇺🇸 US 🇨🇦 CA | RearBlower Motor Resistor Pigtail | View on Amazon |
This table covers the connectors at the blower resistor or control module. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: GPD 1712767.
Body Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT146 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2612 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 19168025 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2929 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| ACDELCO Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2771 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 13577915 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2792 | 🇺🇸 US 🇨🇦 CA | Fits Side Impact Sensor-Left RearSi Elec Code:B63LR | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 84999471 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 13576549 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2881 | 🇺🇸 US 🇨🇦 CA | BlackTerminal Type: Blade Pin | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 87815146 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2626 | 🇺🇸 US 🇨🇦 CA | SI ELEC CODE: P25POWER SOUNDER CONTENT THEFT DETERRENT ALARM MODULE | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 85576725 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 13314098 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT2888 | 🇺🇸 US 🇨🇦 CA | Windshield Wiper MotorSi Elec Code: M75 | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 19352907 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
This table covers the body-harness connectors and pigtails. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.
16 Body Wiring Harness / Connector parts for the 2018 Cadillac CT6 come from 2 brands — GM GENUINE and ACDELCO. The "Popular" part is GM GENUINE PT146.
Brake Pedal Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S1670 | 🇺🇸 US 🇨🇦 CA | Terminal Type: Blade Terminals | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S2506 | 🇺🇸 US 🇨🇦 CA | Terminal Type: Blade | View on Amazon |
This table covers the harness connectors at the Brake Pedal. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Brake Pedal Connector parts for the 2018 Cadillac CT6 come from STANDARD MOTOR PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS S1670 and STANDARD MOTOR PRODUCTS S2506.
Cabin Air Temperature Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S717 | 🇺🇸 US 🇨🇦 CA | Attachment Method: Push OnIncludes Interior Lamp Switch | View on Amazon |
This table covers the harness connectors at the Cabin Air Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S717.
Camshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT3940 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S2316 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalNumber of Splice Connectors Included: 3 | View on Amazon |
| DORMAN Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 645325 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 86792094 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| HOLSTEIN Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 2HAR0060 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | CON62 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 1P3652 | 🇺🇸 US 🇨🇦 CA | Fits Intak | View on Amazon |
This table covers the harness connectors at the Camshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
7 Camshaft Position Sensor Connector parts are listed for the 2018 Cadillac CT6, from ACDELCO, STANDARD MOTOR PRODUCTS, DORMAN and 4 other brands. ACDELCO PT3940 carries the "Popular" badge.
Part numbers include ACDELCO PT3940, STANDARD MOTOR PRODUCTS S2316 and DORMAN 645325, among others listed above.
Crankshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S2316 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalNumber of Splice Connectors Included: 3 | View on Amazon |
| ACDELCO Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | PT3940 | 🇺🇸 US 🇨🇦 CA | GM Original Equipment | View on Amazon |
| DORMAN Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 645325 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| GM GENUINE Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 86792094 | 🇺🇸 US 🇨🇦 CA | Black | View on Amazon |
| HOLSTEIN Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | 2HAR0060 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the harness connectors at the Crankshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
5 Crankshaft Position Sensor Connector parts are listed for the 2018 Cadillac CT6, from STANDARD MOTOR PRODUCTS, ACDELCO, DORMAN and 2 other brands. STANDARD MOTOR PRODUCTS S2316 carries the "Popular" badge.
This group includes STANDARD MOTOR PRODUCTS S2316, ACDELCO PT3940 and DORMAN 645325 and the remaining parts above.
Fuel Injection Pressure Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS Turbocharged | S2882 | 🇺🇸 US 🇨🇦 CA | Connector Shape: RectangularHarness Length | View on Amazon |
This table covers the harness connectors at the Fuel Injection Pressure Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Cadillac CT6 — STANDARD MOTOR PRODUCTS S2882.
Buying Electrical Connector Parts for a 2018 Cadillac CT6
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Match the engine first. Every electrical connector part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Body Wiring Harness / Connector and Camshaft Position Sensor Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2018 Cadillac CT6?
Our catalog currently lists 50 electrical connector parts for the 2018 Cadillac CT6 across 15 subcategories and 11 brands, covering all 4 engine options (2.0L L4 ELECTRIC/GAS Turbocharged, 2.0L L4 Turbocharged, 3.0L V6 Turbocharged and 3.6L V6). Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2018 Cadillac CT6 engines?
Yes. Every electrical connector part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical connector problems on a 2018 Cadillac CT6?
Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. 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, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
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 Cadillac CT6 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 Cadillac CT6?
First match the engine — each row shows which engine(s) the part fits. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 Cadillac CT6
Electrical Connector Parts for Other Cadillac CT6 Years
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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.