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Home >> GMC >> 2003 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different car >> Section 499 (Automatic Transmission - 4L80-E/4L85-E (Troubleshooting)) >> Troubleshooting >> First and Fourth Gear Only - D4

First and Fourth Gear Only - D4

WARNING: This page is about a different car, the 2004 GMC Yukon XL, 2004 Chevrolet Suburban, and 2004 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
First and Fourth Gear Only - D4

Checks Cause
1-2 Solenoid (313)
  • Stuck On
  • Pinched wire to ground
1-2 Shift Valve (314) Stuck
PCM Failed
Check the PCM for current DTCs.
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