2021 GMC Yukon XL 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

18 Alternator / Generator parts for the 2021 GMC Yukon XL come from 7 brands — PURE ENERGY, GM GENUINE, FVP and 4 other brands. The "Popular" part is GM GENUINE 13563316.

The New section lists 6 options from GM GENUINE, SKP and WAI GLOBAL — brand-new units rather than rebuilt ones. GM GENUINE 13563316 is listed in this group.

The Remanufactured section lists 12 options from PURE ENERGY, FVP, REMY and 1 other brand — factory-rebuilt units with new wear components. FVP 10440 is listed in this group.

This table covers the Alternator / Generator bolts. Read more

GM GENUINE supplies both parts for the 2021 GMC Yukon XL.

Part numbers include GM GENUINE 11611102 and GM GENUINE 11611384.

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

2 Alternator / Generator Pulley parts are listed for the 2021 GMC Yukon XL, from CONTINENTAL and LITENS.

This group includes CONTINENTAL 49910 and LITENS 920091A.

This table covers the sirens in the anti-theft system. Read more

GM GENUINE supplies both parts for the 2021 GMC Yukon XL.

Part numbers include GM GENUINE 39119104 and GM GENUINE 13569122.

This table covers the brackets that mount the Anti-Theft Siren. 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

One part is listed for the 2021 GMC Yukon XL — GM GENUINE 84608863.

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

20 Battery parts are listed for the 2021 GMC Yukon XL, from ACDELCO, DEKA, FVP and 6 other brands. DEKA 9A49 carries the "Popular" badge.

The AGM (Extended Life) section lists 18 options from ACDELCO, DEKA, FVP and 5 other brands — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A49 is listed in this group.

The Performance AGM (Extended Life + Increased Power) section lists 2 options from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT89049 is listed in this group.

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

2 Battery Cable parts for the 2021 GMC Yukon XL come from GM GENUINE.

This group includes GM GENUINE 84966318 and GM GENUINE 85645720.

This table covers the Battery Current 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. Read more

This group shows a single part: STANDARD MOTOR PRODUCTS BSC150.

This table covers the Battery Terminal Bolt nuts. Read more

2 Battery Terminal Bolt / Nut parts for the 2021 GMC Yukon XL come from GM GENUINE.

Listed part numbers: GM GENUINE 11546389 and GM GENUINE 11570961.

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

This group shows a single part: GM GENUINE 13548775.

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

This group shows a single part: GM GENUINE 84868669.

This table covers the resettable circuit breakers in this vehicle's electrical system. Read more

3 Circuit Breaker parts are listed for the 2021 GMC Yukon XL, from STANDARD MOTOR PRODUCTS and GM GENUINE.

Listed part numbers: GM GENUINE 84215440, STANDARD MOTOR PRODUCTS FH58 and STANDARD MOTOR PRODUCTS FH59.

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

This group shows a single part: GM GENUINE 12719704.

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

One part is listed for the 2021 GMC Yukon XL — GM GENUINE 11519377.

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 85538412.

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

43 Fuse parts are listed for the 2021 GMC Yukon XL, from GM GENUINE, BUSSMANN and ACDELCO. GM GENUINE 15305191 carries the "Popular" badge. 10 Amp, 100 Amp, 125 Amp, 15 Amp, 150 Amp, 175 Amp, 2 Amp, 20 Amp, 225 Amp, 25 Amp, 250 Amp, 3 Amp, 30 Amp, 300 Amp, 350 Amp, 4 Amp, 40 Amp, 450 Amp, 5 Amp, 50 Amp, 60 Amp, 7.5 Amp and 70 Amp are all represented, and 25 Amp alone accounts for 5 parts.

This table covers the Hands Free Vehicle Access 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 85038020.

This table covers the Hands Free Vehicle Access 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. Read more

This group shows a single part: GM GENUINE 85518160.

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

One part is listed for the 2021 GMC Yukon XL — GM GENUINE 85587715.

This table covers the Jumper cables. 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

This group shows a single part: GM GENUINE 85012025.

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

This group shows a single part: GM GENUINE 13560220.

This table covers the Lane Departure 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

This group shows a single part: GM GENUINE 86517920.

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

This group shows a single part: GM GENUINE 84922663.

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 the 3 Park Assist (PAS) Camera Module parts for the 2021 GMC Yukon XL.

Part numbers include GM GENUINE 84761801, GM GENUINE 84761799 and GM GENUINE 84761800.

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

4 Parking Aid Sensor parts for the 2021 GMC Yukon XL come from 4 brands — BOSCH, GM GENUINE, TECHPRO and 1 other brand.

Part numbers include BOSCH F00E270754, GM GENUINE 84586217 and TECHPRO GM1175107, 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

4 Parking Aid Sensor Bracket parts for the 2021 GMC Yukon XL come from 2 brands — GM GENUINE and VARIOUS MFR.

This group includes GM GENUINE 87813724, GM GENUINE 87814099 and VARIOUS MFR GM1074103 and the remaining parts 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 2021 GMC Yukon XL.

Listed part numbers: GM GENUINE 86588245 and GM GENUINE 84434758.

This table covers the Rain 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. Read more

2 Rain Sensor parts for the 2021 GMC Yukon XL come from GM GENUINE.

This group includes GM GENUINE 23410847 and GM GENUINE 85880857.

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 13542886.

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

3 Side Object Sensor Module parts for the 2021 GMC Yukon XL come from GM GENUINE.

Part numbers include GM GENUINE 86558606, GM GENUINE 86558607 and GM GENUINE 85811490.

This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor. Read more

6 Speed Sensor parts are listed for the 2021 GMC Yukon XL, from GM GENUINE and STANDARD MOTOR PRODUCTS. GM GENUINE 24060867 carries the "Popular" badge.

Listed part numbers: GM GENUINE 24060867, GM GENUINE 24043446 and GM GENUINE 24060866, plus the other parts above.

This table covers the Speed Sensor caps. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

One part is listed for the 2021 GMC Yukon XL — GM GENUINE 84884492.

This table covers the Starter bolts. Read more

2 Starter Bolt parts for the 2021 GMC Yukon XL come from 2 brands — DORMAN and GM GENUINE.

This group includes DORMAN 72004 and GM GENUINE 11610633.

This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

7 Starter Motor parts for the 2021 GMC Yukon XL come from 7 brands — GM GENUINE, WAI GLOBAL, PURE ENERGY and 4 other brands. The "Popular" part is GM GENUINE 12732343.

The New section: 2 options from GM GENUINE and WAI GLOBAL. GM GENUINE 12732343 is listed in this group.

The Remanufactured section: 5 options from PURE ENERGY, BOSCH, FVP and 2 other brands. PURE ENERGY 12823 is listed in this group.

This group includes GM GENUINE 12732343, WAI GLOBAL 16393N and PURE ENERGY 12823 and the remaining parts above.

This table covers the Video control modules. Read more

This group shows a single part: GM GENUINE 84931603.

This table covers the Wiring Harness clips. Read more

This group shows a single part: GM GENUINE 12337820.