Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2024 GMC Sierra 2500 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2024 GMC Sierra 2500. The contact stated while reversing, the rear-view camera displayed a blank screen. The 4WD system engaged unintendedly, and the park assist sensor was inoperable while an unknown message was displayed. Additionally, the vehicle lost motive power while driving. The check engine warning light was illuminated. The vehicle was towed to the dealer, who replaced an unknown module and reset the computer, but the failure persisted. The contact stated that the vehicle was taken to the dealer five times, but the failure recurred after several unknown repairs. The vehicle was not repaired. The contact had requested for a buyback from the dealer, but no assistance was provided. The manufacturer was made aware of the failure. The failure mileage was approximately 8,000.
The contact owns a 2024 GMC Sierra 2500. The contact stated while driving at an undisclosed speed, another vehicle drove by on the driver's side of the vehicle, and the blind spot alert light illuminated on the passenger's side of the vehicle, even though the vehicle was present on the driver's side. The contact also stated that the failure only occurred when the Adaptive Cruise Control was activated. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who was able to duplicate the failure but was unable to provide a fix. The vehicle was not repaired. The manufacturer was notified of the failure but did not assist. The failure mileage was 3.
The contact owns a 2024 GMC Sierra 2500. The contact stated while towing a trailer and driving down a hill at approximately 40 MPH, the integrated trailer braking system error message was displayed, and the trailer braking system failed to activate. The vehicle was later taken to the local dealer who was unable to replicate the failure and failure was found. The dealer later informed the contact that the solar panel system on the trailer might have caused the integrated trailer braking system to malfunction. The contact stated that after turning off the solar panel system the failure persisted. The cause of the failure was not yet determined. The manufacturer was not contacted. The failure mileage was 800.
The contact owns a 2024 GMC Sierra 2500. The contact stated that the vehicle had failed to start on several occasions. The vehicle was taken to the dealer, where it was diagnosed with low voltage and electrical failures. The dealer replaced the two batteries; however, the failure recurred. The dealer then replaced one of the batteries; however, the failure persisted. The vehicle was towed to the dealer. The vehicle was not repaired. The manufacturer was notified of the failure, and the contact requested buyback assistance, but no assistance was provided. A case was filed. The failure mileage was approximately 22,000.
The contact owns a 2024 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the trailer brakes deactivated independently. The contact stated that the failure occurred while the contact was towing a trailer. The contact stated that the failure was persistent. The vehicle was taken to the dealer. The vehicle was not diagnosed; however, the trailer brake control module was replaced. The failure reoccurred. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 1,001.
The contact owns a 2024 GMC Sierra 2500. The contact stated that the vehicle would not not immediately start and had also experienced electrical malfunctions which caused multiple unknown warning lights to display and flash including the seat restraint warning and the ABS and Air Bag warnings. The vehicle was taken to the local dealer who diagnosed that the two batteries located under the hood were faulty and needed to be replaced. Both batteries were replaced and the failure was remedied. The manufacturer was notified of the failure but no assistance was offered. The failure mileage was 40,000.
The contact owns a 2024 GMC Sierra 2500. The contact received notification of NHTSA Campaign Number: 24V894000 (LATCHES/LOCKS/LINKAGES); and the vehicle was taken to a local dealer where the recall repair was performed; however, the contact became aware that the battery was draining, and the vehicle failed to start on more than one occasion. The contact stated that the check engine warning light remained illuminated. The local dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 41,000.
The contact owns a 2024 GMC Sierra 2500. The contact stated while driving at an undisclosed speed, the sun struck the solar panel used to charge the battery, and the surge from the battery entered the pigtail going through the truck, and disconnected the brake module, causing it to become disengaged from the vehicle. The contact took the vehicle to the camper and vehicle dealer who both stated there was no issue for concern. The vehicle was not repaired. The manufacturer of the camper and the vehicle were made aware of the issue. The vehicle failure mileage was 8,000.
Brake control module disconnects trailer brakes while towing. Apparently a known issue with trailers equipped with solar battery chargers which have higher charge than vehicle battery. It feeds back into the trailer brake power module causing it to shut down. The vehicle has an integrated trailer brake controller as it is specifically designed with primary function as a tow vehicle. Shutting down the integrated trailer brake controller results in loss of trailer brakes. Not having trailer brakes is critically dangerous. GM has issued a TSB #23-NA-149 specifically addressing this known defect. Unfortunately, GM refuses to authorize its service technicians to replace the defective brake controller unless they experience the defect personally - the policy is to disbelieve the customer with the defective vehicle. …
024 GMC Sierra 2500 Denali Ultimate, which has suffered: Five catastrophic engine failures at highway speeds. Total brake failure, leaving the truck unable to stop. Severe electrical malfunctions, including flickering headlights at night. Retaliatory actions from General Motors after I refused to waive my legal rights. I have documented proof, including GM's own service records, emails, and a 7-minute recorded statement from GM's highest-level technician, confirming that GM installed the wrong computer module (1500 series instead of the required 2500 series) in my truck. Additionally, I have evidence that GM executives instructed technicians to conduct diagnostics, take apart the engine, and reassemble it-but NOT repair the defect-after I refused to sign an affidavit waiving my rights. …
Electrical complaints in other Sierra 2500 years
Frequently asked questions
How common are electrical problems on the 2024 GMC Sierra 2500?
NHTSA has 33 complaints about the electrical system of the 2024 GMC Sierra 2500, 31% of the model year's 106 complaints. The component named most often is integrated trailer brake control (3 mentions).
Is there a recall for 2024 GMC Sierra 2500 electrical problems?
No. NHTSA lists no electrical system recall for the 2024 GMC Sierra 2500, though it has 4 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2024 GMC Sierra 2500 electrical problems start?
Half of the complaints with a recorded mileage happened before about 8,000 miles, and 75% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 3 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.