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Frequently Asked Questions

Oil Life Reset

2001-2007 Classic
With Steering Wheel Controls
1.  Press and hold the RETURN ARROW button on steering wheel while "Change Oil Soon" warning message appears

Without Steering Wheel Controls
1. Turn the ignition key to the RUN position
2. Fully push and release the accelerator pedal 3 times within 5 seconds
3. If the Change Oil Soon light flashes, the system is resetting
4. Turn the key to OFF
5. Start the vehicle
6. The oil life will change to 100%
7. If the Change Oil Soon reappears following this procedure, repeat the steps as the system is not reset

 

Fuel Filter Reset

2001-2007 Classic
With Steering Wheel Controls
1.  Press and hold the RETURN ARROW button on steering wheel while "Change Fuel Filter Soon" warning message appears

Without Steering Wheel Controls
1. Turn the ignition key to the RUN position
2. Push the accelerator and brake pedal simultaneously and hold for 10 seconds
3.  Turn the ignition off and the system is reset
 4. If the Change Fuel Filter Soon reappears following this procedure, repeat the steps as the system is not reset

Restarting After Running Out of Fuel

1.  Fill tank with 5 to 10 gallons of fuel.
2.  Open bleeder screw on top of fuel filter housing.
3.  Pump primer button (also located on top of fuel filter housing) until fuel with very little air begins coming out of the bleeder screw.
4.  Close bleeder screw.
5.  Pump primer button until it becomes very firm and will no longer push down.
6.  Have someone crank the engine over (20 seconds max) while you pump the primer button as quickly as possible.
7.  The truck should start up.  If it does not, wait one minute for the starter to cool down and repeat steps 2 through 6.  Some trucks will require this procedure be repeated up to 3 times.

*DO NOT use any type of starting fluid, EVER.  This will harm the glow plugs and can result in flash back if the intake heater kicks on while spraying.  This isn't legal jargon about "don't do this because we don't want the liability", I'm trying to save you from some expensive repairs and severe burns on your face and body.

*This process is an attempt to push fuel to the high pressure fuel pump (CP3) as it has almost no suction power on its own if there is no fuel present.

 

Hissing Noise After Start ('04.5 LLY to Present)

The truck makes an unusual hissing noise that turns back into a rumble soon after start up.  This takes place after each start up and is the turbo vanes cycling from 100% closed to 100% open and then back to the normal idling position.  The engine control module (ECM) does this in order to calibrate itself with the turbo vanes after each start up.

 

When to Plug in the Truck

Generally a Duramax does not need plugged into until the temperature reaches -20 degrees Fahrenheit.  The engine has a very sophistcated electronic computer that recognizes air temperature and adjusts fuel and timing accordingly in order to easily start.

*DO NOT use any type of starting fluid, EVER.  This will harm the glow plugs and can result in flash back if the intake heater kicks on while spraying.  This isn't legal jargon about "don't do this because we don't want the liability", I'm trying to save you from some expensive repairs and severe burns on your face and body.


Call Us: 937.657.1162