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Old 06-30-2009, 07:52 PM   #14
mlee's Avatar
Drives: 2018 Silverado
Join Date: Oct 2008
Location: Conroe, TX
Posts: 32,341
I've seen this happen when filling up and topping off the gas too much, but you said this started with a half full tank... Banshee is right... Don't disconnect your battery cable, this would also erase trouble codes.

Give it a few more cycles and take to the dealer if it persists. Possibly a bad gas cap
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