2015 Gmc Sierra 3500 problems, complaints & recalls
Most-reported problem areas: Exterior Lighting (5) · Engine (4) · Air Bags (3)
🧭 Reliability snapshot
Compared against other Gmc Sierra 3500 model years — complaint volume vs the model's median year, recalls and severity. How we score →
🛣️ Complaints by mileage
22 NHTSA complaints that reported an odometer reading.
Safety recalls (7)
Air Bags:side/Window:curtain:inflator 2021-07-01 · campaign 21V504000 · 410,019 vehicles
Defect: General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500, 2500, 3500, and Chevrolet Silverado 1500, 2500, and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator, or the inflator sidewall may rupture.
Risk: A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.
Fix: Dealers will replace the left and right side RRAB modules, free of charge. Interim owner notification letters informing owners of the safety risk were mailed on August 18, 2021. Owners will receive a second notice when the remedy is available. Phase I owner notification letters were mailed on May 5, 2022. Phase II owner notification letters are expected to be mailed on May 31, 2022. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. T
Air Bags:side/Window:curtain:inflator 2020-11-25 · campaign 20V736000 · 9,279 vehicles
Defect: General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500 and Chevrolet Silverado 1500 and 2015 GMC Sierra 2500 and 3500, and Chevrolet Silverado 2500 and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator.
Risk: If the end cap separates from the inflator, the compressed gas will escape and the end cap can be propelled into the vehicle, increasing the risk of injury or a crash.
Fix: GM will notify owners, and dealers will replace the RRAB modules on the left and/or right side, free of charge. Interim owner notification letters were mailed on December 22, 2020. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. Note: GM filed a new recall, number 21V-504 that supersedes this recall. All vehicles previously recalled under 20V-736 will now be repaired under the new recall number 21V-504. GM's numbers for this recall
Service Brakes, Hydraulic:pedals And Linkages 2018-08-30 · campaign 18V578000 · 42,280 vehicles
Defect: General Motors LLC (GM) is recalling certain 2015-2016 Chevrolet Silverado 2500, 3500, 1500 Crew Cab Special Service, Tahoe Police Pursuit/Special Service, GMC Sierra 2500, and 3500 vehicles. The brake pedal pivot nut may loosen, causing the brake pedal to be loose or inoperative.
Risk: If the brake pedal becomes loose or inoperative, the driver may be unable to stop the vehicle by using the brake pedal. Additionally, a loose pedal may also interfere with the accelerator pedal. Either condition may increase the risk of a crash.
Fix: GM will notify owners, and dealers will add adhesive to the nut and reinstall the nut with increased tightness, free of charge. The recall began October 3, 2018. Owners may contact Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 18278. Note: The vehicles in this recall need this additional remedy despite being covered by recall 16V069 for brake pedal loosening.
Fuel System, Gasoline:storage:auxillary Tank 2017-10-19 · campaign 17V664000 · 35,292 vehicles
Defect: General Motors LLC (GM) is recalling certain 2011-2015 Chevrolet Silverado 3500 and GMC Sierra 3500 trucks equipped with dual fuel tanks. The low fuel level sensor for the front tank may stick causing the rear tank to overfill the front tank.
Risk: If the front tank overfills, the excess pressure may cause the front tank to expand and contact the driveshaft, possibly resulting in a hole in the tank. The hole will leak fuel, which in the presence of an ignition source, can increase the risk of a fire.
Fix: GM has notified owners, and dealers will replace the rear tank fuel pump or update the fuel-level sensor software, as well as inspect the front tank, replacing it as necessary, free of charge. The recall began December 11, 2017. Owners may contact GM customer service for Chevrolet 1-800-222-1020 or for GMC customer service at 1-800-462-8782. GM's number for this recall is 17399.
Seat Belts:pretensioner 2017-07-10 · campaign 17V437000 · 40,683 vehicles
Defect: General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may
Risk: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Fix: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on August 4, 2017. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 17287.
Seat Belts:pretensioner 2016-09-08 · campaign 16V651000 · 3,640,162 vehicles
Defect: General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing
Risk: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
Fix: GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on October 13, 2016. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 16007.
Service Brakes, Hydraulic:pedals And Linkages 2016-02-05 · campaign 16V069000 · 430,771 vehicles
Defect: General Motors LLC (GM) is recalling certain model year 2015-2016 Chevrolet Silverado 1500, 2500, and 3500 heavy duty trucks manufactured October 1, 2013, to February 1, 2016, 2015-2016 Chevrolet Tahoe Police Pursuit Vehicles (PPV) manufactured March 1, 2014, to February 1, 2016, and 2015-2016 GMC Sierra 2500 and 3500 heavy duty trucks manufactured October 29, 2013, to February 1, 2016. On the affected vehicles, the brake pedal pivot nut may loosen, causing the brake pedal to be loose or inoper
Risk: If the brake pedal becomes loose or inoperative, the driver may be unable to stop the vehicle by using the brake pedal. Additionally, a loose pedal may also interfere with the accelerator pedal. Either condition may increase the risk of a crash.
Fix: GM will notify owners, and dealers will add adhesive to the brake pedal pivot nut and reinstall with an increased torque, free of charge. The recall began on March 14, 2016. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is 20760.
Service bulletins (872)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-09-26 · PIT5698F · Service Bulletin/Repair Instructions
this pi provides diagnostics tips on how the lin bus works and how to diagnosis it.
Unknown Or Other 2026-09-04 · PIP4902W · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Unknown Or Other 2026-07-21 · PIT5099J · Service Bulletin/Repair Instructions
pi to help diagnose a/c concern
Unknown Or Other 2026-07-21 · PIT5509N · Service Bulletin/Repair Instructions
this pi provides diagnostic tips for diagnosing electric trailer brakes issues.
Unknown Or Other 2026-05-14 · PIT5509M · Service Bulletin/Repair Instructions
this pi provides diagnostic tips for diagnosing electric trailer brakes issues.
Unknown Or Other 2026-04-01 · PIT3271Q · Service Bulletin/Repair Instructions
this preliminary information communicates information about how to determine if a wheel and tires size change is available.
Showing the 6 most recent of 872 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-08-24 · Vehicle Speed Control:accelerator Pedal · 37,000 mi“the contact owns a 2015 gmc sierra 3500. the contact stated that the brake pedal and accelerator pedal lifted while depressed, causing the engine to rev. there were no warning lights illuminated. the dealer was contacted and made aware of the failure. the vehicle was not taken to the dealer to be diagnosed or repaired. the manufacturer was not info…”
2025-08-27 · Air Bags · 155,000 mi“the contact owns a 2015 gmc sierra 3500. the contact stated that after parking in the driveway and turning off the vehicle, approximately 30 minutes later, the rear passenger’s side roof rail air bag erroneously deployed. the cause of the failure was not yet determined. the manufacturer and local dealer were notified of the failure. the vehicle was…”
2024-06-21 · Air Bags“the contact owns a 2015 gmc sierra 3500. the contact received notification of nhtsa campaign number: 21v504000 (air bags); however, the part to do the recall repair was not yet available. the contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. the dealer was made aware of the issue and confirmed that…”
2024-01-25 · Engine And Engine Cooling · 48,815 mi“the contact owns a 2015 gmc sierra 3500. the contact stated while driving approximately 70 mph, the vehicle abruptly lost motive power and decelerated to 25 mph. the contact stated that the message “engine power reduced” was displayed. the contact stated that the failure was intermittent, but always occurred while driving at high speeds. the contac…”
2022-12-01 · Electrical System“the service trailer brake icon keeps appearing on my screen i’m afraid it’s going to not work properly when towing trailers it’s constantly going on and off i believe it’s the brake control module switch but also could be in the harness just want gm to be aware of the many blogs that i have read about with this problem the problem first appeared ab…”
2022-09-21 · Electrical System:horn · 120,000 mi“the contact owns a 2015 gmc sierra 3500. the contact stated while driving 55 mph, another vehicle merged into the lane that the contact was driving in and the contact pressed on the horn pad however, there was no sound coming from the horn. the vehicle was taken to an independent mechanic and the horn was replaced. the contact stated the failure ha…”
2022-09-11 · Electrical System: Integrated Trailer Brake Control“ 4 weeks ago, constant repeated loud chime and visual warning stating " service trailer brake system". this is constantly alarming and unable to be cancelled or acknowledged throughout the drive. this results in distracted driving. furthermore, it occurs both when towing a trailer or not towing. i have noticed decreased braking of the trailer as …”
2022-07-28 · Engine“vehicle has a cp4 fuel pump. this pump has a high failure rate. upon failure the vehicle shuts down and cannot be restarted. this can happen at any time and anywhere. can happen while on a highway or freeway. this vehicle is used to haul heave loads. this failure can ending up to $10,000 or more to repair. this failure has not happened on this vehi…”
2021-12-22 · Air Bags“the contact owns a 2015 gmc sierra 3500. the contact received a recall notification for nhtsa campaign number: 21v504000 (air bags) however, the part to do the recall repair was not yet available. the contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. the manufacturer was notified of the issue. the …”
2021-04-30 · Fuel/Propulsion System · 90,665 mi“i see there was a recall from gm #17399 for the 2015 dual fuel tank sending unit problem. this is only for the 6.0 l gas engine. i have the duramax 6.6l engine in mine. i had the same problem with mine. the sending unit did not turn off the transfer pump and overfilled the front tank causing fuel to pour out all over the road. i caught it befor…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.