15111 - special coverage. on some 2012 model year chevrolet silverado, express, colorado and gmc sierra,...

Bulletin number

15111

Component

Power train: automatic transmission

Summary

15111 - special coverage. On some 2012 model year chevrolet silverado, express, colorado and gmc sierra, savana, and canyon vehicles equipped with a 4.3l, 2.9l, or 3.7l engine (rpo lu3, llv, or llr) and a 4l60e automatic transmission (rpo m30), the malfunction indicator lamp (mil) may be illuminated and the transmission may exhibit a harsh shift from first gear to second gear. This condition may also set diagnostic trouble code (dtc) p0741 in the transmission control module (TCM). If dtc p0741 is found, dealers are to replace the automatic transmission wiring harness.

Owners of these vehicles have filed 20 complaints in the transmission category.