2024 GMC Sierra 2500 Electrical Problems

Intermittent trailer disconnect and loss of electric trailer brake output while towing Airstream. The truck is connected to the trailer through the seven Way plug. There are no modifications to the truck. This is a safety hazard as I pull a 9000+ lb trailer. Trailer connection drops momentarily and integrated trailer brake controller loses communication with trailer brakes. I went on a 5000 mile trip and my trailer brakes were connecting in disconnecting consistently. Every time there was a disconnection or connection the vehicle would “ding ding. This virtually happened consistently while we were on this long trip. During the trip, we tried to wedge the plug tight and zip tie the door shut, attempting to keep the plug tight. My truck is at the dealership, waiting on a “tool“. This is the second time it has been in the shop for this issue. I supplied a picture of the dash message after it got tired of connecting and disconnecting. I feel this is a serious safety issue. Thank you, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11737376

Incident

Mar 13, 2026

IOK Radio Module failure. Inhibits hands free calling, total loss of all audio including safety chimes, dropped emergency call capability, multiple software updates have failed to resolve it. Vehicle is still under warranty.

NHTSA ID

11734424

Incident

Mar 18, 2026

IOK Radio Module failing. Would happen 10 times in less than 5 miles. Vehicle has been seen 3 times before diagnosing as IOK Radio Module failure. Inhibits hands free calling, total loss of all audio including safety chimes, dropped emergency call capability, multiple software updates have failed to resolve it. Vehicle is still under warranty. Serviced at Garrett Motors in Coolidge, AZ

NHTSA ID

11734423

Incident

Feb 2, 2026

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.

NHTSA ID

11730404

Incident

Oct 1, 2024

Mileage

8,000 mi

The vehicle went into low power mode and said to pull over. As soon as that message appeared the next warning appeared and said to shift to neutral and pull over immediately and attempt to restart. The vehicle immediately shut off after second warning before having time to pull over from first message. I was able to pull most of the way off the road as the vehicle had shut off there was no power steering and had limited ability to steer the vehicle. This all happened without advance warning or any other warning that there was an issue while traveling at over 75mph. Vehicle would not restart and needed to be towed. Dealer stated it was a fule control module that was hard to get due to a recall. But that my vehicle was not part of that recall.

NHTSA ID

11724530

Incident

Mar 9, 2026

Onstage control module fail and drains batteries leading to power failure.

NHTSA ID

11715367

Incident

Jan 27, 2026

About 2-3 months ago I had a battery swell up and start smoking and making an awful smell in my truck. I took it to dealership and was informed that I needed a new battery and it was not covered under bumper to bumper warranty or my extended warranty which I thought was ludicrous. The truck is 18 months old. It does have 50,000 miles but I have yet to see one that isn’t at least prorated for five years. So fast forward to today and the other battery starts doing the same thing except this time my lights are going crazy. Brights on and off and on and off. I get back to my camp and the battery and wiring is smoking like crazy. I towed it to the shop. It’s been in there two weeks and the only thing they tell me now is that I need 2 new batteries and that’s all they can do until I agree to pay for the other one that isn’t under warranty (because I already paid 300 to change 1st one it’s under warranty for 5 years). So I told them to do it. It’s been there two weeks and not a damn thing has been done. Not even installed a new battery. I know because I went yesterday and they couldn’t open my tailgate to get my tools out. Probably the last GMC I purchase.

NHTSA ID

11711030

Incident

Jan 4, 2026

This vehicle exhibits the same failure described in NHTSA Recall N232426400 — spontaneous unlatching after rain due to water intrusion into the exterior tailgate release switch. I’m requesting a goodwill replacement under GM bulletin # N232426400 as the failure mechanism and part are identical. It has caused brake failure and nearly killed me because of battery drain while driving. All American Chevrolet of Midland Texas is refusing to solve the problem and says no recall is available.

NHTSA ID

11695406

Incident

Oct 24, 2025

LED instrument cluster goes blank. No speedometer, no fuel gauge, oil gauge, nothing.

NHTSA ID

11693238

Incident

Oct 6, 2025

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.

NHTSA ID

11684471

Incident

Aug 4, 2025

Mileage

41,000 mi

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.

NHTSA ID

11683641

Incident

May 15, 2024

Mileage

22,000 mi

During a drive home, while in motion, the tailgate of the vehicle opened on its own. This has occurred after the recall to repair this issue was already performed. I know the tailgate was shut prior to the drive because I back into my parking spot and walk the sidewalk behind my truck prior to starting the vehicle.

NHTSA ID

11682282

Incident

Aug 20, 2025

Having issues with inner tailgate opening on its own and items falling out of bed/box onto road!

NHTSA ID

11648882

Incident

Mar 5, 2025

The side mirrors have spider cracked from some type of electrical issue. This is the 2nd time this happened and it burns both mirrors at the same time. The mirrors become unusable and it appears The dealer replaced them under warranty the first time and the second time they said it is out of warranty so I had to pay out of pocket.

NHTSA ID

11644813

Incident

Jan 28, 2025

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. Due to these failures, I suffered a dislocated shoulder in one of the incidents, and my [XXX] daughter remains traumatized to this day. Given the immediate danger this defect poses to other GMC Sierra 2500 owners, I respectfully request that NHTSA open an investigation and consider issuing a recall before a tragedy occurs. 1. Engine Failures Since 3,000 Miles – GM’s Own Work Orders Confirm Issue Since purchasing my 2024 GMC Sierra 2500 Denali Ultimate, I have experienced five catastrophic engine failures, all occurring while traveling at highway speeds (70 mph): •The truck suddenly lost power, dropping from 70 mph to 5-10 mph within seconds. •This created an immediate risk of being rear-ended or losing control on the highway. •GM’s own service records confirm that my engine issues began at just 3,000 miles. •GM dealerships misdiagnosed the issue FOUR TIMES, returning my truck to me in an unsafe condition. •The real cause was only identified after the FIFTH failure, when a GM-certified head technician finally determined that GM had installed the wrong computer module (1500 series instead of 2500 series). This means that for months, GM knew my vehicle w INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA

NHTSA ID

11643292

Incident

Feb 18, 2025

I leased this vehicle on May 17, 2024, expecting it to function as intended. Instead, within months, it suffered recurring and escalating failures that have rendered it unsafe and unusable. January 7, 2025, I brought the truck to Gates GMC for routine service and reported that it had lunged forward by approximately 2 to 2.5 feet while shifting into park. Additionally, it exhibited irregular acceleration and rough down shifting in lower gears. I also communicated the check engine light has come on and gone off on the dashboard over the past week a few times without receiving any information on the app. At this January 7th visit, GM performed Recall N242435631, supposedly addressing a known battery drain defect that caused total vehicle shutdowns. On January 24, 2025, I started the truck and was immediately overwhelmed by an intense chemical odor coming through the ventilation system. January 31 – February 1, 2025 – Erratic Engine Warning Lights & Diagnostic Failures On January 31, 2025, at 5:28 PM, on this key cycle the check engine light illuminated but failed to register in the GM app. On the next key cycle, the warning disappeared. The following morning, February 1, 2025, at 10:26 AM, the check engine light Appeared on the first key cycle before disappearing on the second key cycle. The onboard diagnostics system failed to log or retain these warnings. On February 7, 2025, the vehicle suffered a complete electrical failure. no electronic function whatsoever. Roadside Assistance attempted to jump-start the truck using a high-powered jump pack, but it remained inoperable. A ford super duty and jump pack were needed to force start the truck. February 10, 2025 the truck suffered another total electrical failure and required towing to Gates GMC. The app indicated the Brake System, Anti-Lock Braking System, Emissions System (Specifically the exhaust system), and Power Train requiring service. My truck is at Gates GMC and was drawing 90 milliamps opposed to 40

NHTSA ID

11642114

Incident

Jan 7, 2025

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.

NHTSA ID

11632650

Incident

Sep 1, 2024

Mileage

40,000 mi

I drove from California to ohio after I bought the truck, I noticed that when stopping to get gas my tailgate was open without me touching it. I drove with cameras showing the truck bed to see what happened and I watched it do it again while driving the vehicle, it just opened on its own while driving. The incident happened again once I was back in ohio when I had my trailor hooked up and it cause the tailgate to collide with the trailor tongue and dented the whole top of the tailgate.3

NHTSA ID

11600504

Incident

Mar 1, 2024

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. Effectively, this requires providing the trailer to the service tech to drive around until the brakes fail, thus creating another dangerous situation for a tech who may or may not have experience driving vehicles over 50’ in length. Thus, it would appear the best remedy is to enforce a recall to replace the defective brake controller before someone is harm by loss of brakes, since GM requires its techs to encounter a loss of brakes before authorization of replacement of the known defective unit. This happened over 25 times during a trip last week. This fact situation reveals why your Administration actually exists - to protect the public from harm.

NHTSA ID

11591633

Incident

May 26, 2024

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.

NHTSA ID

11582523

Incident

Apr 6, 2024

Mileage

8,000 mi

water intrusion resulted in the tailgate inadvertently unlatching while the vehicle is in park multiple times while being washed. This apparently happened throughout the night, assuming voltage was being used to send open signal, which resulted in drained battery. In my case my vin is not on the recall that is out on GMC for tailgate issue. And dealership determined there is a pinch in tailgate speaker harness that is causing the issue. Which I’m sure that harness is tied into tailgate latch harness. What needs to be addressed in this recall is for the two drain holes on top of tailgate to be somehow sealed. Drain holes are directly above tailgate latch and harnesses which is the main concern in this problem.

NHTSA ID

11582168

Incident

Apr 7, 2024

While driving both drivers and passenger side blind spot warning lights flash on and off when no cars are near. The problem is worse at night when pulling a trailer. The lights sometimes stay on or starting flashing on both side causing a significant distraction.

NHTSA ID

11577009

Incident

Mar 12, 2024

[XXX] has a trailer brake control module issue that causes the trailer brake to periodically disengage and reengage. Unfortunately, I had to drive across the country on a military PCS move with this intermittent failure. GMC has provided numerous surveys to ask about my experience with my new GMC. Overall, the vehicle adequate, and in each survey I have annotated this issue. However, it does not appear the issue is being taken seriously as I have not seen a recall. A trailer brake that intermittently fails is extremely dangerous. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11569499

Incident

Aug 21, 2023

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.

NHTSA ID

11566359

Incident

Jan 13, 2024

Mileage

3 mi

When the car is on and in park, there is a button on the front console that drops the tail gate. The truck gives you no indication that the button has been pressed or that the tailgate is open. You can then drive the truck with the tailgate open and have no indication or idea. As a result, it is easy to lose gear out of the truck bed while you are driving. This button is located just above a storage compartment and is easy to press while placing items in this compartment. This is a major safety hazard on the road. There is no option to disable this button or be alerted when you tailgate is open.

NHTSA ID

11544374

Incident

Aug 21, 2023