Chevrolet Blazer 2020–2023 — technical service bulletin
Bulletin PIT5843B · NHTSA communication 10237684 · issued May 24, 2023
Technical service bulletin
communication type
Parking Brake
component
2020–2023
model years
4
vehicle entries
Official summary
This Preliminary information communicates that a vehicle may come to the dealer with concerns of various warning messages, possibly the door locks cycling, passive entry inoperative or other concerns. The technician is instructed to inspect G401 for loose or missing terminals and to inspect G405.
Vehicles covered
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.