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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 72 (Automatic Transmission Diagnosis - 4L80-E (Diesel)) >> Diagnostic Tests >> DTC P0751: 1-2 Shift Solenoid Valve - Performance >> Conditions For Setting DTC P0751

Conditions For Setting DTC P0751

WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTC will set under the following conditions:

  1. Stuck Off

    For 2 occurrences:
    • 1st gear is commanded and the gear ratio is equal to 2nd gear for greater than 1.5 seconds.
    • 4th gear is commanded, with TCC locked, and the gear ratio equals 3rd gear for greater than 3 seconds.

  1. Stuck On

    For 5 occurrences:
    • 2nd gear is commanded and the gear ratio equals 1st gear for greater than 2.2 seconds.

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