Chevrolet Silverado 1500 2020–2025 — technical service bulletin
Bulletin PIT6177B · NHTSA communication 11012973 · issued Jan 10, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2020–2025
model years
12
vehicle entries
Official summary
This Preliminary information communicates an issues of the left rear leaf spring making a squeaking noise due to diesel fuel contamination that may occur during refueling after the fuel nozzle is removed from the fuel filler pipe. Dealers are to create a foam seal around the fuel filler pipe to prevent fuel from leaking onto the left spring.
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.