GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Avalanche - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E/4L85-E 🢒 Fourth Gear Starts

Fourth Gear Starts for Chevrolet Avalanche - 2WD 2003

Checks

Cause

2-3 Shift Solenoid Valve
    • Stuck On
    • Pinched wire to ground

Check the PCM for current DTCs.