2018 GMC Sierra 1500 Electrical Parts

This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator. Read more

19 Alternator / Generator parts for the 2018 GMC Sierra 1500 come from 10 brands — WAI GLOBAL, GM GENUINE, TERREPOWER and 7 other brands. The "Popular" part is GM GENUINE 84143543. Every part fits all 3 engine options (4.3L V6, 5.3L V8 and 6.2L V8).

The New section lists 6 options from WAI GLOBAL, GM GENUINE and TYC — brand-new units rather than rebuilt ones. GM GENUINE 84143543 is listed in this group.

The Remanufactured section lists 13 options from TERREPOWER, BOSCH, DENSO and 4 other brands — factory-rebuilt units with new wear components. TERREPOWER 42093 is listed in this group.

This table covers the Alternator / Generator bolts. Read more

GM GENUINE supplies the 3 Alternator / Generator Bolt parts for the 2018 GMC Sierra 1500.

This group includes GM GENUINE 11548514, GM GENUINE 11548181 and GM GENUINE 11611384.

This table covers the Alternator / Generator Cooling hoses. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

2 Alternator / Generator Cooling Hose parts for the 2018 GMC Sierra 1500 come from GM GENUINE.

Listed part numbers: GM GENUINE 84010623 and GM GENUINE 84010624.

This table covers the pulleys on the alternator shaft. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

4 Alternator / Generator Pulley parts are listed for the 2018 GMC Sierra 1500, from LITENS, ACDELCO and CONTINENTAL. All of them fit every engine offered in the 2018 Sierra 1500.

This group includes ACDELCO 37205P, CONTINENTAL 49954 and LITENS 920030A and the remaining parts above.

This table covers the Anti-Theft control modules. Read more

2 Anti-Theft Control Module parts are listed for the 2018 GMC Sierra 1500, from GM GENUINE and SHEE-MAR. All of them fit every engine offered in the 2018 Sierra 1500.

This group includes GM GENUINE 13523300 and SHEE-MAR SM1269.

This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery. Read more

19 Battery parts are listed for the 2018 GMC Sierra 1500, from DEKA, LUCAS, EXIDE and 5 other brands. DEKA 9A48 carries the "Popular" badge.

The AGM (Extended Life) section lists 12 options from DEKA, LUCAS, EXIDE and 4 other brands — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A48 is listed in this group.

The Performance AGM (Extended Life + Increased Power) section lists 1 option from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT85094R is listed in this group.

6 ungrouped parts are not assigned to a grade, with the same engine-level match.

This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early. Read more

8 Battery Cable parts for the 2018 GMC Sierra 1500 come from 3 brands — GM GENUINE, SHEE-MAR and STANDARD MOTOR PRODUCTS. The "Popular" part is GM GENUINE 23164924. 4 parts fit every engine; the other 4 are engine-specific.

Listed part numbers: GM GENUINE 23164924, GM GENUINE 84634114 and GM GENUINE 84634113, plus the other parts above.

This table covers the clamps and brackets that secure the battery. Read more

2 Battery Hold Down parts for the 2018 GMC Sierra 1500 come from DORMAN. Every part fits all 3 engine options (4.3L V6, 5.3L V8 and 6.2L V8).

Part numbers include DORMAN 390030 and DORMAN 60329.

This table covers the Battery Terminal Bolt nuts. Read more

This group shows a single part: GM GENUINE 11609585.

This table covers the covers that protect battery terminals. Read more

One part is listed for the 2018 GMC Sierra 1500 — GM GENUINE 22945779.

This table covers the trays the battery sits in. Read more

5 Battery Tray parts are listed for the 2018 GMC Sierra 1500, from DORMAN, SKP and ULTRA-POWER. DORMAN 60328 carries the "Popular" badge. All of them fit every engine offered in the 2018 Sierra 1500.

This group includes DORMAN 60328, DORMAN 00089 and SKP SK60328 and the remaining parts above.

This table covers the body-control modules that run lighting, locks and wipers. Read more

This group shows a single part: GM GENUINE 13528941.

This table covers the brackets that mount the Body Control Module (BCM). Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

2 Body Control Module (BCM) Bracket parts for the 2018 GMC Sierra 1500 come from GM GENUINE.

Part numbers include GM GENUINE 84179833 and GM GENUINE 84206594.

This table covers the engine-control modules that run fuel, spark and emissions. Read more

2 Engine Control Module (ECM Computer) parts for the 2018 GMC Sierra 1500 come from GM GENUINE.

Listed part numbers: GM GENUINE 12704475 and GM GENUINE 19432268.

This table covers the Engine Control Module (ECM Computer) bolts. Read more

One part is listed for the 2018 GMC Sierra 1500 — DORMAN 700251.

This table covers the brackets that mount the Engine Control Module (ECM Computer). Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

This group shows a single part: GM GENUINE 23283540.

This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse. Read more

46 Fuse parts are listed for the 2018 GMC Sierra 1500, from BUSSMANN and GM GENUINE. BUSSMANN ATM10 carries the "Popular" badge. Grades run from 10 Amp through 70 Amp; 15 Amp is the most populated section, led by BUSSMANN.

This table covers the fuse blocks that hold this vehicle's fuses. Read more

This group shows a single part: DORMAN 956599.

This table covers the horns mounted in the front of the vehicle. Read more

15 Horn parts are listed for the 2018 GMC Sierra 1500, from FIAMM, DORMAN and GM GENUINE. FIAMM 7210223 carries the "Popular" badge.

In the Accessory Replacement grade, FIAMM supplies 7 parts: grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. A representative part number is FIAMM 7210223.

The Standard Replacement section lists 8 options from FIAMM, DORMAN and GM GENUINE — built to original-equipment specification. FIAMM 7201223 is listed in this group.

This table covers the receivers that pick up the key-fob unlock signal. Read more

2 Keyless Entry Module / Receiver parts for the 2018 GMC Sierra 1500 come from GM GENUINE.

This group includes GM GENUINE 13523298 and GM GENUINE 13587439.

This table covers the key fobs that lock, unlock and start the vehicle. Read more

10 Keyless Entry Remote parts for the 2018 GMC Sierra 1500 come from 2 brands — GM GENUINE and DORMAN. The "Popular" part is GM GENUINE 13580082.

This table covers the replacement shells for the key fob. Read more

2 Keyless Entry Remote Case parts for the 2018 GMC Sierra 1500 come from DORMAN.

Listed part numbers: DORMAN 95642 and DORMAN 92025.

This table covers the modules that control the exterior lighting. Read more

This group shows a single part: GM GENUINE 23219989.

This table covers the Park Assist (PAS) Camera modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

GM GENUINE supplies both parts for the 2018 GMC Sierra 1500.

Listed part numbers: GM GENUINE 84169043 and GM GENUINE 84169042.

This table covers the ultrasonic park-aid sensors in the bumper. 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. Read more

5 Parking Aid Sensor parts for the 2018 GMC Sierra 1500 come from 5 brands — STANDARD MOTOR PRODUCTS, AUTOTECNICA, BOSCH and 2 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS PPS46.

Part numbers include STANDARD MOTOR PRODUCTS PPS46, AUTOTECNICA GM0818678 and BOSCH 0263043553, among others listed above.

This table covers the brackets that mount the Parking Aid Sensor. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

9 Parking Aid Sensor Bracket parts for the 2018 GMC Sierra 1500 come from 4 brands — GM GENUINE, WESTIN, AUTOTECNICA and 1 other brand. The "Popular" part is AUTOTECNICA GM0816944.

Part numbers include AUTOTECNICA GM0816944, GM GENUINE 23276807 and DORMAN 42449, among others listed above.

This table covers the totally-integrated power modules that distribute body electrical power. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

GM GENUINE supplies both parts for the 2018 GMC Sierra 1500.

Part numbers include GM GENUINE 84181077 and GM GENUINE 84181078.

This table covers the Serial Data Gateway modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

This group shows a single part: GM GENUINE 13599318.

This table covers the Side Object Sensor modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

This group shows a single part: GM GENUINE 42625293.