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Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - Overhaul - 4L80-E >> Trouble Shooting >> Symptom Diagnosis >> 2nd & 3rd Gear Only

2nd & 3rd Gear Only

Possible trouble Code 68, 82 or 85. Stuck 1-2 shift valve. Failed solenoid "A" (solenoid "A" off). Dirt in filter, PCM or TCM not grounded, leaking "O" ring, no supply voltage to solenoid "A" or wire disconnected.