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GMC Electrical System Recalls Cover Power Loss and Fire Risks
These GMC electrical notices cover different failures across Sierra, Hummer EV and Canyon vehicles. The 2019-2020 Sierra 1500 battery-cable recall describes excessive glue on cable rings, potentially causing an intermittent alternator connection, stalling and electrical arcing. For the 2024 Hummer EV SUV and Sierra EV, insufficient insulation on rear-drive motor wires can allow contact and loss of drive power. The July 2026 notice identifies an improperly secured internal battery component in the 2022 Hummer EV Pickup and 2026 Sierra EV, creating a fire risk. Separately, the 2023 Canyon camera system may falsely detect obstacles and trigger unexpected automatic emergency braking.
Warning signs to watch for
- December 12, 2019 Sierra 1500 recall: The vehicle may stall.
- May 9, 2024 Hummer EV SUV/Sierra EV recall: The vehicle may lose drive power.
- February 22, 2024 Canyon recall: Unexpected automatic emergency braking may abruptly stop or slow the truck.
Can you keep driving? What the notices say
None of the four listed GMC electrical system notices instructs owners to stop driving or park outside. The December 2019 Sierra 1500 battery-cable notice does not tell owners to stop driving. Neither does the July 2026 high-voltage battery notice covering Hummer EV Pickup and Sierra EV vehicles. The May 2024 rear-drive-unit notice and February 2024 Canyon front-camera notice also do not tell owners to stop driving. These statements reflect the instructions in the supplied notices.
What the free repair involves
The Sierra 1500 cable notice specifies inspection, cleaning and reattachment as necessary; its supplied remedy is truncated and does not state a price. Free remedies in the other notices are high-voltage battery replacement for the July 2026 recall, rear drive unit replacement for the May 2024 recall, and Canyon front-camera software updates for the February 2024 recall.
Severity at a glance
| Severity | Recalls |
|---|---|
| critical | 2 |
| high | 1 |
| medium | 1 |
Models affected most
Where owners report electrical system problems most
NHTSA owner complaints filed under electrical system for the GMC models and years in this guide. Complaints are unverified reports and are not limited to the recalled defects.
| Vehicle | Electrical system complaints |
|---|---|
| 2019 GMC Sierra 1500 | 94 |
| 2020 GMC Sierra 1500 | 78 |
| 2023 GMC Canyon | 20 |
| 2022 GMC Hummer EV Pickup | 3 |
| 2024 GMC Sierra EV | 1 |
Every recall in this group
| Date | Recall | Severity |
|---|---|---|
| Jul 30, 2026 | Cadillac Escalade IQ, Hummer EV Battery Fire Risk | critical |
| May 9, 2024 | GM Electric Vehicles May Lose Drive Power | high |
| Feb 22, 2024 | Chevrolet Colorado GMC Canyon Camera May Trigger Sudden Braking | medium |
| Dec 12, 2019 | Chevrolet Silverado, GMC Sierra Battery Cable Connection Issue | critical |
Common questions
Why could my 2023 GMC Canyon brake when there is no obstacle?
The February 22, 2024 recall says the front camera system may falsely detect an obstacle and engage automatic emergency braking unexpectedly. The truck may abruptly stop or slow down. Dealers update the front camera module software free of charge.
Which GMC electric vehicles have the rear drive unit recall?
The May 9, 2024 notice identifies certain 2024 GMC Hummer EV SUV and Sierra EV vehicles. Insufficiently insulated motor wires in the rear drive unit may contact each other, causing loss of drive power. Dealers replace the rear drive unit free.
What does the Sierra 1500 battery-cable repair involve?
For certain 2019-2020 Sierra 1500 trucks, the December 2019 notice specifies inspecting the alternator cable attachment for glue or contamination, then cleaning and reattaching it as necessary. The supplied remedy text is truncated and does not state whether this work is free.
A recall applies only to specific vehicles. Check your 17-character VIN at nhtsa.gov/recalls.