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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 359 (Automatic Transmission - 6T70 (M7U M7W) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P071A: Transmission Tow Mode Switch Circuit >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

If the electrical circuit tests are OK and the shift pattern is not occurring, there may be a mechanical/hydraulic condition that prevents operation. Refer to Symptoms - Automatic Transmission .

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