First and Second Gear Only - D4. GMC Truck GMC C Sierra

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2002 🢒 GMC C Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 First and Second Gear Only - D4

Checks

Cause

2-3 Solenoid (311)

Check for DTCs.

•

Stuck Off

•	Loose connector

•	No voltage to the solenoid

•	Solenoid O-ring failure

•	No PCM signal to the solenoid

2-3 Shift Valve (312)

Stuck

Quad Driver Module

Failed

Check the PCM for current DTCs.