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2005
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Sierra 1500 4WD V6-4.3L VIN X
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Superceded Bulletins
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4WD/AWD System - 'Service 4WD' Lamp ON/DTC C0374
4WD/AWD System - 'Service 4WD' Lamp ON/DTC C0374
This TSB number 05-04-21-003A, dated 03/03/06 has been superceded by TSB number 05-04-21-003C , dated 04/15/08