GM Service Manual Online
For 1990-2009 cars only

Engine Compartment Fuse Block

The CNG fuel system wiring in your vehicle is protected from short circuits by five fuses and a relay. They are located in the engine compartment fuse block. If a CNG fuel system fuse is bad, your bi-fuel vehicle will start and operate on gasoline.

The fuse block is located in the engine compartment on the driver's side of the vehicle.


Object Number: 894642  Size: C2

Fuses

Usage

21

Passenger side CNG and gasoline injectors

23

Driver's side CNG and gasoline injectors

33

High Pressure Lockoff Main

35

Low Pressure Lockoff

63

High Pressure Lockoff for Tanks 1 and 3

Relays

Usage

62

High Pressure Lockoff

There is also an inline fuse located on the left side of the frame rail under the CNG tank bracket. It controls the high pressure lockoff for Tank 2. If you need to access this fuse, contact your dealer.

For more information about the fuses, relays and circuit breakers in your vehicle, see "Fuses and Circuit Breakers" in the Index of your owner's manual.