CNG Fuel Tank Venting Procedure: Notes

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

NOTE: Venting of natural gas to the atmosphere may be prohibited in some areas. Before venting the CNG fuel tank, contact the local gas company to ensure that all local, state and federal regulations are observed. Venting cannot be stopped once the High Pressure Lock-Off (HPL) has been opened with the manual vent tool. Venting CNG fuel tank will damage the HPL. Venting is only necessary for HPL replacement, internal tank cleaning, tank replacement or tank shipping.