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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Automatic Transmission - 6T40 (MNH MNK) Or 6T45 (MHG) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0776 Or P0777: Pressure Control Solenoid Valve 2 Stuck Off OR On - Transmission Hydraulic/Mechanical Performance >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

Before performing a road test, configure and setup the scan tool for snapshot mode. This will allow you to display, monitor, and verify multiple transmission data parameters at one time, after the road test.

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