Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
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Repairpal verified 2008 Chevrolet Trailblazer problems
Electrical power may be lost to the interior of the vehicle due to a blown 125 amp fuse located at the under hood fuse box. This fuse can blow if jumper cables are connected incorrectly. Replacing the blown fuse will commonly correct this problem.