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Yukon XL 4WD V8-5.3L
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Electrical - Aftermarket Electrical Accessory Precaution
Electrical - Aftermarket Electrical Accessory Precaution
This TSB number 08-08-45-004A, dated 01/29/09 has been superceded by TSB number 08-08-45-004C , dated 04/08/11