Circuit/System Verification

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, observe the scan tool Trans. Fluid Temp. and the TCM temperature parameters. The readings should vary less than 10°C (18°F).

If within the specified range, test for a transmission overheat condition.

If greater than the specified range, replace the Q8 control solenoid valve assembly.