Affected Component: POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)

Date Published

AUG 01, 2003

NHTSA TSB #

10004367

TSB Document

• Sorry, the NHTSA has not posted this TSB document yet.

You can still get the detailed info from GMC for this TSB. Call your local GMC dealer's service department & ask for a copy of TSB# 030421006.

Summary

SERVICE 4WD LIGHT ON, 4WD INOPERATIVE, HARSH ENGAGEMENT OF 4WD, NO COMMUNICATION WITH TRANSFER CASE CONTROL MODULE (TCCM), TCCM DIAGNOSTIC TROUBLE CODE (DTC) C0550 SET. *TT