Chevrolet Blazer 1999–2001 — technical service bulletin
Bulletin 990421003B · NHTSA communication 619378 · issued Apr 1, 2001
Technical service bulletin
communication type
Power Train
component
1999–2001
model years
15
vehicle entries
Official summary
Some owners may comment on a slipping type condition at the front wheels while the vehicle is in four wheel drive (4wd). *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.