GM Service Manual Online
For 1990-2009 cars only

Shift Lever Indicates Wrong Gear for GMC Truck GMC MD Steel Tilt (W Model) 2003

Checks

Cause

Manual Valve (319)

Not engaged to detent lever

Detent Pin (711)

Misaligned or broken

Manual Shaft (708)

The flats are not parallel.

Indicator Linkage

Misadjusted