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Home >> GMC >> 2021 >> Terrain Denali, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0721-P0723, P077C, or P077D >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2020 GMC Terrain and 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
9 V Reference P077C P077C P077D P0721, P0722, P0723
Signal P077C P077C P077D * P0721, P0722, P0723
*Internal control module or component damage may occur if the circuit shorts to B+.
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