Chevrolet Blazer 2001–2003 — technical service bulletin
Bulletin 3153 · NHTSA communication 10009984 · issued Nov 3, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2001–2003
model years
10
vehicle entries
Official summary
Transfer case oil in hvac vacuum lines supplement to 03-01-38-009. *tc update. *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.