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

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2001 🢒 GMC C Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 Second and Third Gear Only - D4

Checks

Cause

1-2 Solenoid (313)

Check for DTCs.

•

Stuck Off

•	Loose connector

•	No voltage to the solenoid

•	Solenoid O-ring failure

•	No PCM signal to the solenoid

1-2 Shift Valve (314)

Stuck

PCM Quad Driver Module

Failed

Check the PCM for current DTCs.