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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 >> Engine Starts in Gear

Engine Starts in Gear

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.
Engine Starts in Gear

Checks Cause
Manual Valve (319)
  • Valve is not engaged to the detent lever.
  • Valve is stuck in the wrong position.
Park/Neutral Safety Switch The switch is not operating.
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