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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1150 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0976 To DTC P2764) >> DTC P0989 or P0990 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

If there are any other transmission related DTCs set, diagnose those DTCs first.

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