Sealing the Quarter Panel Caution
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Properly seal the fuel filler opening before you position the quarter panel. Failure to seal the opening could allow exhaust gas to leak into the interior of the vehicle, causing personal injury.