Chevrolet Avalanche 2012 — technical service bulletin
Bulletin PI1343B · NHTSA communication 10112292 · issued Jan 26, 2016
Technical service bulletin
communication type
Power Train
component
2012
model years
10
vehicle entries
Official summary
This preliminary informational bulletin provides a procedure to reset the transmission adapts and test drive in additon to a transmission control module reprogram to correct a harsh or tie up feeling from 6-4 downshift
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.