Cadillac Escalade 2015 — technical service bulletin
Bulletin 15389 · NHTSA communication 10090012 · issued May 21, 2015
Technical service bulletin
communication type
Power Train
component
2015
model years
7
vehicle entries
Official summary
15389 - service update. This bulletin provides a service procedure to reprogram the transmission control module (tcm) on certain 2015 model year cadillac escalade, escalade esv, chevrolet silverado, gmc sierra, yukon denali and yukon denali xl vehicles equipped with an 8l90 8-speed (m5u) transmission and 6.2l (l86) engine. These vehicles may have a condition in which transmission calibration allows a higher than target energy input to the torque converter clutch (tcc) under certain conditions. This may lead to faster than expected torque converter clutch material wear, and a shudder feeling wh
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.