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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 >> Fourth Gear Starts

Fourth Gear Starts

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.
Fourth Gear Starts

Checks Cause
2-3 Shift Solenoid Valve
  • Stuck On
  • Pinched wire to ground
Check the PCM for current DTCs.
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