GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 Soft Shift 2 to 1

Checks

Cause

Center Support Springs (635)

Not acting

Retainer Ring (634)

Not seated

Center Support (640)

Blocked air bleed