Component Testing

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

Perform the Fluid Leak Diagnosis .
Perform the Transmission Fluid Level and Condition Check procedure.
Perform the Line Pressure Check procedure.
Perform the Main Fluid Pump Pressure High or Low procedure.
With a hand held infra red thermometer or J 24731 tempil stick, test for the transmission cooler supply line thermostat opening at 80°C (176°F). The transmission cooler supply line temperature should be higher on the transmission side of the thermostat than the cooler side until 80°C (176°F) is reached.
If the thermostat tests stuck open or closed, replace the transmission cooler supply line assembly.