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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 154 (Automatic Transmission - 4L80-E/4L85-E - Service, Diagnosis & Troubleshooting) >> First and Second Gear Only - D4

First and Second Gear Only - D4

WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
First and Second Gear Only - D4

Checks Cause
2-3 Solenoid (311)
Check for DTCs.
  • Stuck Off
  • Loose connector
  • No voltage to the solenoid
  • Solenoid O-ring failure
  • No PCM signal to the solenoid
2-3 Shift Valve (312) Stuck
Check the PCM for current DTCs.
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