Chevrolet Silverado 1500 2020–2025 — technical service bulletin
Bulletin PIT6177B · NHTSA communication 11012973 · issued Jan 10, 2025
Technical service bulletin
communication type
Unknown / 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.