Tank Inspection
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the CNG fuel tank and brackets every 3 years or 36,000 miles, whichever comes first. Record the inspection information in the CNG Fuel Tank Inspection Record. The CNG Fuel Tank Inspection Record is located in the owner's manual supplement.
- Do not remove the tank from the vehicle for general inspections. Tank removal is only necessary if the following conditions are present:
- The tank has been exposed to corrosive chemicals such as acid or alkali.
- Unusual corrosion is observed in the bed area.
- Obvious damage is observed in the bed area.
- The tank straps are loose or damaged.
- The vehicle has been involved in a collision and damage is observed in the tank area.
- Ensure the tank cover is in place and intact. Never operate or store the vehicle outside with the tank cover removed. The CNG tank wrap can be damaged by extended exposure to Ultra-Violet (UV) radiation. Extended exposure to UV radiation can cause the following conditions:
- Loss of label legibility.
- Loose fibers as the epoxy resin degrades.
- Chalking of the epoxy coating on the liner.
- If the tank is replaced, perform the following steps:
- Obtain a NEW underhood CNG tank expiration label.
- Obtain a NEW fill area CNG tank expiration label.
- Record the NEW tank service expiration date onto both labels by adding 15 years to the date of tank manufacture.