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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1992 (Automatic Transmission - 2MT70 - DTC P0218 To DTC P0963) >> DTC P077B >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that DTCs P0721, P0722, P0723, P0966, P0967, P0969, P0970, P0971, P0973, P0974, P0976, P0977, P2720, P2721, P2728, P2729, or P2730 are not set.
  2. Operate the vehicle at 16-32 km/h (10-20 mph) while observing the Transmission Data Output Shaft Direction parameter on the scan tool.
    • The Output Shaft Direction parameter should match vehicle direction.
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