How do you adjust the idle on a Duramax?
To enable or disable the high idle system perform the following procedure:
- Turn the ignition ON with the engine OFF.
- Depress the accelerator pedal to the floor and hold down.
- While the accelerator pedal is depressed, depress the brake pedal 3 times in less than 8 seconds.
- Release the accelerator pedal.
- Start the engine.
How do you set the high idle on a 2018 Duramax?
To enable the Fast Idle System, press and release the cruise control on/off button and ensure that the switch indicator light is lit. . Press and release the cruise control SET- button. Engine speed will be held at approximately 1200 rpm.
How does the ECM increase the idle speed?
The ECM increases the idle speed using the following adjustments: • The turbocharger vane position is commanded closed–The vane position will be farther closed than any other normal operating condition.
How does a high idle system work on a diesel?
Let me know if it works. The diesel engine has a high idle system to improve the warm-up time of the engine in cold weather conditions. This system allows the engine control module ( ECM) to increase the idle speed above the normal calibrated value. The ECM increases the idle speed using the following adjustments:
Is there a high idle switch on a Duramax?
You described the standard elevated idle feature that comes with all the Duramax trucks. The OP was referring to an optional feature RPO UF3 called “High Idle Switch” – the difference being that the higher idle will be available all the time, not just when the coolant is cold.
Why does my Silverado have a high idle?
The diesel engine has a high idle system to improve the warm-up time of the engine in cold weather conditions. The idle speed will return to normal if any of the following conditions occur: • There is brake, clutch, or throttle input from the driver. automatic transmission is shifted out of Park or Neutral.
Where is the fast idle switch on a Duramax?
The manual fast idle switch is operated using the cruise control buttons on the left side of the steering wheel. . The parking brake is set. . The brake pedal is not pressed.
Is there a high idle cruise control switch?
Double check to confirm that you have the “high idle switch, requires cruise control.” Currently a $200 option. Yes – the dealer can enable high idle; whether or not they will is another story. Think it’s really a lost cause, but maybe someone can get it done and report back on any success…
Is there a cruise control switch on a Duramax?
There is no hardware added with the current model, it is just a programming change to enable a feature that actually exists on any of the trucks with cruise control.
Where is the ignition switch on a Duramax?
Turning the ignition switch to the LOCK/OFF position. It operates using the cruise control switches, so it should be just a programming change. (like setting an enable ‘bit’?) (the ‘elevated idle’, used to warm the engine and trans, is standard on all 6.6L Dmaxes.) If equipped, this feature is available only with cruise control.