GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
1999
🢒
GMC Suburban - 2WD
🢒
Transmission/Transaxle
🢒
Automatic Transmission - 4L80-E
🢒 Fourth Gear Starts
Fourth Gear Starts
Checks
Cause
2-3 Shift Solenoid Valve
•
Stuck On
•
Pinched wire to ground
Check the VCM/PCM for current DTCs