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Home >> GMC >> 2024 >> Terrain SLT, FWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures (1 Of 2) >> Diagnostic Information and Procedures >> DTC P0721-P0723, P077C, P077D, or P172A >> Diagnostic Fault Information

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
9 V Reference P077C P077C P077D P0721, P0722, P0723, P172A
Signal P077C P077C P077D * P0721, P0722, P0723, P172A
*Internal control module damage may occur if the circuit is shorted to B+.
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