Second and Third 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.
Second and Third Gear Only - D4
| Checks |
Cause |
1-2 Solenoid (313)
Check for DTCs. |
- Stuck Off
- Loose connector
- No voltage to the solenoid
- Solenoid O-ring failure
- No PCM signal to the solenoid
|
| 1-2 Shift Valve (314) |
Stuck |
| PCM |
Failed |
| Check the PCM for current DTCs. |