Symptoms - Automatic Transmission: Notes

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT:

Use the symptom tables only if the following conditions are met:

Refer to Diagnostic Starting Point - Vehicle .
There are no DTCs set.
The control modules can communicate via the serial data link.
Review the system operation in order to familiarize yourself with the system functions. Refer to Transmission General Description , and Transmission Component and System Description .