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Sierra 1500 2WD V8-5.3L
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Fuel/Electrical - Hum/Buzz From Vehicle Rear
Fuel/Electrical - Hum/Buzz From Vehicle Rear
This TSB number 06-06-03-011A, dated 01/09/07 has been superceded by TSB number 06-06-03-011B , dated 02/16/07