TSB Document:

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

You can still get the detailed info from Buick for this TSB. Call your local Buick dealer's service department & ask for a copy of TSB# 040421004.

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

Summary

4WD SWITCH INDICATOR LIGHTS FLASHING, 4WD INOPERATIVE, DIAGNOSTIC TROUBLE CODES C0327, P0550 SET. *TT

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