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.

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

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

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Date Published
AUG 01, 2003
NHTSA TSB #
10004367
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