Chevrolet Blazer EV 2024–2026 — technical service bulletin
Bulletin PIT6315A · NHTSA communication 11027599 · issued Jan 7, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2024–2026
model years
21
vehicle entries
Official summary
This Preliminary information communicates information to direct the dealer or upfitter to GM Upfitter Bulletin 203 for information on installing the Universal Vehicle Module.
Vehicles covered
- 2024 Chevrolet Blazer EV
- 2025 Chevrolet Blazer EV
- 2026 Chevrolet Blazer EV
- 2024 Chevrolet Silverado 1500
- 2025 Chevrolet Silverado 1500
- 2026 Chevrolet Silverado 1500
- 2024 Chevrolet Silverado 2500
- 2025 Chevrolet Silverado 2500
- 2026 Chevrolet Silverado 2500
- 2024 Chevrolet Silverado 3500
- 2025 Chevrolet Silverado 3500
- 2026 Chevrolet Silverado 3500
- 2024 GMC Sierra 1500
- 2025 GMC Sierra 1500
- 2026 GMC Sierra 1500
- 2024 GMC Sierra 2500
- 2025 GMC Sierra 2500
- 2026 GMC Sierra 2500
- 2024 GMC Sierra 3500
- 2025 GMC Sierra 3500
- 2026 GMC Sierra 3500
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.