Chevrolet Avalanche 1500 2007 — technical service bulletin
Bulletin 3939 · NHTSA communication 10020965 · issued Oct 5, 2006
Technical service bulletin
communication type
Engine and Engine Cooling
component
2007
model years
11
vehicle entries
Official summary
Transfer case control module investigation. *kb
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.