Doing Your Own Service Work for Chevrolet Chevy C Silverado - 2WD (CNG) 2004

Caution: Never try to do your own service work on the Compressed Natural Gas (CNG) fuel system. The CNG fuel system operates under high pressure. You can be injured and your vehicle can be damaged if you try to do your own service work. Service and repair of this system should only be performed by a GM-trained alternative fuels service technician with the proper knowledge and tools.