Chevrolet Silverado 1999 — technical service bulletin
Bulletin 99027B · NHTSA communication 6089003 · issued Dec 1, 1999
Technical service bulletin
communication type
Power Train
component
1999
model years
3
vehicle entries
Official summary
General motors has decided that some vehicles may have the auxiliary transmission oil cooler omitted. *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.