Chevrolet Blazer 1999–2001 — technical service bulletin
Bulletin 990421003C · NHTSA communication 10004401 · issued Aug 1, 2003
Technical service bulletin
communication type
Power Train
component
1999–2001
model years
15
vehicle entries
Official summary
Front wheels slipping with vehicle in four wheel drive. *tt
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.