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GMC Equipment Recalls Address Block Heater Fires and Missing Information
The GMC equipment notices combine a block-heater fire hazard with errors or omissions in owner information. Certain 2017-2019 Sierra 2500 and 3500 trucks with a 6.6-liter Duramax diesel and optional block-heater cord may develop a short in the heater cable or connecting terminals. The 2023 Acadia notice concerns illegible tire-size information on the certification label. For the 2021 Canyon, the load-capacity placard overstates capacity by the notice's stated 22.5 kg (51 lbs.). The February 2026 notice concerns missing electronic owner's manuals across multiple GMC models, including 2025-2026 Canyon and 2026 Acadia and Sierra vehicles. Label and manual problems recur as information-related risks.
Warning signs to watch for
- September 22, 2022 Acadia recall: Tire-size information on the driver's-side B-pillar certification label may be illegible.
- February 26, 2026 electronic owner's manual recall: The electronic owner's manual may be missing.
Can you keep driving? What the notices say
None of the four listed GMC equipment notices instructs owners to stop driving or park outside. The July 2021 Sierra block-heater notice does not tell owners to stop driving. The September 2022 Acadia certification-label notice likewise does not tell owners to stop driving. The July 2021 Canyon load-capacity-label notice and February 2026 electronic owner's manual notice also do not tell owners to stop driving. These statements describe the driving instructions provided in the supplied notices.
What the free repair involves
The block-heater notice specifies heater and cord replacement and free replacements under a separate program for vehicles with the feature disabled as a remedy. Acadia certification labels are replaced free. Canyon owners receive a free replacement B-pillar label to apply or have a dealer install. The manual recall provides a free radio reset to facilitate automatic manual download.
Severity at a glance
| Severity | Recalls |
|---|---|
| critical | 1 |
| medium | 1 |
| low | 2 |
Models affected most
Every recall in this group
| Date | Recall | Severity |
|---|---|---|
| Feb 26, 2026 | GM vehicles may be missing the electronic owner's manual | low |
| Sep 22, 2022 | Cadillac and GMC label with unreadable tire size information | medium |
| Jul 1, 2021 | Silverado, Sierra Block Heater Cord Fire Risk | critical |
| Jul 1, 2021 | GMC Canyon load capacity label shows wrong weight | low |
Common questions
Which GMC Sierra trucks have the block-heater cord recall?
The July 1, 2021 notice identifies certain 2017-2019 Sierra 2500 and 3500 vehicles equipped with a 6.6-liter Duramax diesel and optional engine-block heater cord. It describes possible shorts in the heater cable or terminals and specifies heater and cord replacement.
What is wrong with the 2021 GMC Canyon load-capacity label?
The July 1, 2021 Canyon notice says the placard lists a load-carrying capacity 22.5 kg (51 lbs.) above the intended amount. GM mails a replacement label free of charge. Owners may apply it or bring it to a dealer for installation.
How is the missing GMC electronic owner's manual restored?
The February 26, 2026 notice specifies a dealer radio reset that facilitates automatic download of the electronic owner's manual, free of charge. GMC coverage includes certain 2025-2026 Canyon vehicles and multiple 2026 models, including Acadia and Sierra vehicles.
A recall applies only to specific vehicles. Check your 17-character VIN at nhtsa.gov/recalls.