GM Service Manual Online
For 1990-2009 cars only

Caution: Do not remove the Compressed Natural Gas (CNG) fuel tank cover. In the case of a sudden stop or collision, things carried in the bed of your truck could shift forward. The CNG fuel tank could be damaged and cause a natural gas leak. If the gas is accidentally ignited you or others could be seriously injured. If you put things in the bed of your truck, you should make sure they are properly secured.

Notice: If you stack objects on or against the CNG fuel tank cover or sit or stand on the cover, you could damage the cover and/or the CNG fuel tank. Never put anything on or against the CNG fuel tank cover.

See "Loading Your Vehicle" in the Index of your owner manual for cargo loading instructions.