Chevrolet Silverado 1500 2020–2024 — technical service bulletin
Bulletin PIT5811A · NHTSA communication 11006399 · issued Aug 15, 2024
Technical service bulletin
communication type
Unknown OR Other
component
2020–2024
model years
8
vehicle entries
Official summary
This Preliminary information communicates an issue with the out of park signal, used by upfitters, being inoperative. Dealers are to reprogram the BCM with updated cals to enable the upfitter out of park signal.
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.