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RecallGazette

Vehicle problems, recalls & safety intelligence

Chevrolet Avalanche 1999–2012technical service bulletin

Bulletin PIP-3366-B · NHTSA communication 10043185 · issued Nov 1, 2011

Technical service bulletin
communication type
Power Train
component
1999–2012
model years
60
vehicle entries

Official summary

Cadillac/chevrolet/gmc/hummer: some suvs and trucks are exhibiting a condition where by grinding/ratcheting type noise coming from automatic transmission when shifting into park while in 4wd low (4lo) range. *pe

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.