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Home >> GMC >> 1998 >> Yukon 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Diagnostic Tests >> DTC P0751: 1-2 Shift Solenoid ("A") Performance Malfunction >> Diagnostic Aids

Diagnostic Aids

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Verify shift speeds are correct. AUTO TRANS OVERHAUL article. More than one shift may occur due to other internal transmission failures. First diagnose and clear any engine and TP sensor DTCs, then inspect for any transmission DTCs that may have reset.

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