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Diagnostic Aids

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.

When attempting to set solenoid electrical DTCs, ensure the transmission control module is warmed up and the transmission is operated in 4th gear long enough to ensure a 3°C (37°F) increase in TCM temperature parameter. This will place the transmission control module under the optimal conditions to test solenoid electrical DTCs.

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