GMC Sierra 3500 1999–2001 — technical service bulletin
Bulletin 04292004 · NHTSA communication 10013205 · issued Apr 29, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999–2001
model years
3
vehicle entries
Official summary
Engine may have a condition in which the exhaust valve stem may become deformed. This includes 1999-01 chevrolet and gmc 4500 and 5500 models. *eh
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.