GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Avalanche - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E/4L85-E 🢒 Harsh Shift D4 to D3, D2, or D1

Checks

Cause

Spring Assembly (506)

Not functioning

Checkball Orifice

Plugged

Snap Ring (511)

Not seated

Scan Tool Shift Adapts

Maximum shift adapts