Chevrolet Blazer 2001–2003 — technical service bulletin
Bulletin 030138009 · NHTSA communication 10002848 · issued Jun 1, 2003
Technical service bulletin
communication type
Equipment
component
2001–2003
model years
13
vehicle entries
Official summary
Hvac mode switch inoperative or stuck in vent mode, oil in hvac control head and/or vacuum lines. *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.