CNG Fuel Tank and Brackets
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Every three years or 60 000 km (36,000 miles), whichever occurs first, inspect the CNG fuel tank and the mounting brackets for cracks, corrosion, or other damage. Replace the tank, brackets, and/or fasteners as required. Record the inspection date and the results in the CNG Fuel Tank Inspection Record in the owner's manual supplement.