GM Service Manual Online
For 1990-2009 cars only

Caution: Fuel vapor burns violently and a fuel fire can cause bad injuries. To help avoid injuries to you and others, read and follow all the instructions on the pump island. Turn off the engine when you are refueling. Do not smoke if you are near fuel or refueling the vehicle. Do not use cellular phones. Keep sparks, flames, and smoking materials away from fuel. Do not leave the fuel pump unattended when refueling the vehicle. This is against the law in some places. Do not re-enter the vehicle while pumping fuel. Keep children away from the fuel pump; never let children pump fuel.


Object Number: 1262159  Size: B3

The tethered fuel cap is located behind a hinged fuel door on the passenger side of the vehicle.

To remove the fuel cap, turn it slowly counterclockwise. The fuel cap has a spring in it; if the cap is released too soon, it will spring back to the right.

Caution:  Fuel can spray out on you if you open the fuel cap too quickly. If you spill fuel and then something ignites it, you could be badly burned. This spray can happen if the tank is nearly full, and is more likely in hot weather. Open the fuel cap slowly and wait for any hiss noise to stop. Then unscrew the cap all the way.

Be careful not to spill fuel. Do not top off or overfill the tank and wait a few seconds after you have finished pumping before removing the nozzle. Clean fuel from painted surfaces as soon as possible. See Washing Your Vehicle .

When replacing the fuel cap, turn it clockwise until it clicks. Make sure the cap is fully installed. The diagnostic system can determine if the fuel cap has been left off or improperly installed. This would allow fuel to evaporate into the atmosphere. See Malfunction Indicator Lamp .

Caution: If a fire starts while you are refueling, do not remove the nozzle. Shut off the flow of fuel by shutting off the pump or by notifying the station attendant. Leave the area immediately.

Notice: If you need a new fuel cap, be sure to get the right type. Your dealer/retailer can get one for you. If you get the wrong type, it may not fit properly. This may cause the malfunction indicator lamp to light and may damage the fuel tank and emissions system. See Malfunction Indicator Lamp .

Caution: Fuel, including hydrogen, burns violently and a fuel fire can cause bad injuries. To help avoid injuries to you and others, read and follow all the instructions on the pump island. Turn off your vehicle when you are refueling. Do not smoke if you are near fuel or refueling your vehicle. Do not use cellular phones. Keep sparks, flames, and smoking materials away from fuel. Do not leave the fuel pump unattended when refueling your vehicle. This is against the law in some places. Do not re-enter the vehicle while pumping fuel. Keep children away from the fuel pump; never let children pump fuel.

There are three types of fueling procedures:

  1. Non-Communication Fueling (5000 psi (35MPa)): No additional actions needed for communication reasons.
  2. Hardwired Communication Fueling: You will need to connect the dispenser pump side hardwired fueling plug to the vehicle.
  3. Infrared (IR) Communication Fueling: Infrared communication establishes itself automatically. No additional actions needed.

To begin filling your tank with compressed hydrogen:

    • Park your vehicle beside the dispenser.
    • Put the shift lever in PARK (P).
    • Turn off the fuel cell system.
    • Set the parking brake firmly.
    • Open the fuel filler door and remove the fuel filler cap.

The fuel cap is located behind a hinged door on the passenger side of the vehicle.


Object Number: 1966494  Size: B3

The IR-Fueling Communication system is located on the vehicle above the fueling receptacle.

The communication system may not work if the fuel cell system is not turned off, the parking brake is not set firmly, or the shift lever is not in PARK (P).

    • No LED: Vehicle is not ready for fueling. Do not connect the fueling nozzle.
    • Yellow LED: Vehicle is ready for a non-communication fueling operation
    • Green LED: Vehicle is ready for a communication fueling operation.
    • Yellow LED blinking: Vehicle interrupted communication.

Find the station communication system.

If the fueling dispenser has an IR-Interface no further action is required.


Object Number: 1994074  Size: B3

If the fueling dispenser has the hardwired connector, but no IR-Interface, connect the plug to your vehicle.

If no communication system is available, no further action is required.

You may begin fueling according to the status of the LEDs.

The fueling operation will stop automatically when the tank is full.

Caution: If a fire starts while you are refueling, do not remove the nozzle. Shut off the flow of fuel by shutting off the pump or by notifying the station attendant. Leave the area immediately.

When replacing the fuel cap, make sure the cap is fully connected.