GMC Sierra EV
Model Year Comparison
- Worst Model Year
- 2026
- Worst Category
- AC / heater Problems
We don't have a lot of complaints on file for the GMC Sierra EV — feel free to add yours here. Probably because it's so new, but that's still definitely a good sign.
The 2026 GMC Sierra EV has the most overall complaints, & we also rate 2026 as the worst model year ranked on several factors such as repair cost & average mileage when problems occur. The most-reported problem is also with the 2026 GMC Sierra EV for service high voltage battery system and A/C doesn't work.
Worst GMC Sierra EV Problems
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#1: Service High Voltage Battery System And A/C Doesn't Work 2026 Sierra EV
- Average Cost to Fix:
- N/A
- Average Mileage:
- 3,000 mi
We're actively collecting data on the worst problems for the GMC Sierra EV.
Please add any complaints you have so we have more helpful data to show!