Tank Inspection

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the CNG fuel tank and brackets every three years or 36,000 mi (60,000 km), whichever comes first. Record the inspection information in the CNG Fuel Tank Inspection Record, located in the owner's manual supplement. DO NOT remove the tank from the vehicle for general inspections. However, if the tank has been exposed to corrosive chemicals such as acid or alkali, remove the tank in order to perform a complete inspection. Replace tanks with dents to the metal edges greater than 0.060" (1.52 mm) deep. Replace tanks with sharp gouges penetrating the paint and the metal.

A multi-coat paint system with a zinc-rich primer protects the metal tank. Inspect and recoat chips as necessary. See TANK REPAIR .

If the tank is replaced, perform the following steps: Obtain a new CNG Fuel Only label. Obtain a new Bi-fuel Information label. Record the new tank service expiration date, the date of the manufacture plus 15 years, on both labels.