Chevrolet Sierra 1999 — technical service bulletin
Bulletin 010604006 · NHTSA communication 619179 · issued Feb 1, 2001
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999
model years
4
vehicle entries
Official summary
Some customers may comment on a lean hesitation, sag or stumble present during light to moderate accelerations. *tt
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.