What RPM should a Duramax idle at?

This is 1200 RPM for Light duty, and 1500 RPM for medium duty trucks. The idle speed will return to normal if any of the following conditions occur: There is brake, clutch, or throttle input from the driver.

What is the correct RPM at idle?

between 600 and 1,000 rpm
For regular cars, idle speed is typically between 600 and 1,000 rpm, just enough to keep the engine’s ancillary systems going, but not enough to move the car forward much.

Does a LB7 have high idle?

Full manual control of the elevated idle on your Duramax truck is possible with our High Idle Kit. Operation is simple using only your cruise…

Do LB7 Duramax have high idle?

The Duramax will accelerate poorly above ~ 2200 RPM. 2) The 2001 Duramax equipped trucks have three high idle speeds: STANDBY ~850 RPM, SET ~1250 RPM, and RESUME ~1700 RPM. The 2002 and 2003 trucks have only the SET and RESUME speeds available.

Is it bad to let a Duramax idle?

It is true that diesel engines use barely any fuel while idling, far less than a gasoline engine. While it isn’t particularly bad for it, there just isn’t much reason to do it; most diesels start perfectly fine when cold, warm up in a reasonable time, and don’t have gelling issues.

Is 1500 rpm idle bad?

This is a perfectly normal occurrence. It is simply something your car needs to do so that it can start properly. You should not be concerned if your car jumps up to 1500 RPM and then shortly afterward goes back down to a normal 800 RPM.

Does a 04 LB7 have high idle?

The idle speed will increase to ~1250 RPM for 2001 – 2004 LB7 Duramax equipped trucks. 8) Engage the RESUME switch on the cruise control stalk. The idle speed will increase to ~1700 RPM for 2001 – 2003 trucks. If the brake pedal or clutch pedal is released, the high idle speed will resume.

Why is idling a diesel bad?

Avoid prolonged idling. Long periods of idling may be harmful to your engine because combustion chamber temperatures can drop so low that the fuel may not burn completely. Incomplete combustion allows carbon and varnish to form on piston rings and injector nozzles.

What’s the high idle speed on a Duramax truck?

2) The 2001 Duramax equipped trucks have three high idle speeds: STANDBY ~850 RPM, SET~1250 RPM, and RESUME~1700 RPM.   The 2002 and 2003 trucks have only the SETand RESUMEspeeds available. 3) In some cases, the high idle option may need to be programmed using a Tech2 diagnostic scanner before it will function.

What are the installation instructions for LB7 Duramax?

11)Using a small pick or other sharp object, puncture the YELLOWinsulation from the wire side of the blue C1ECM connector to correspond to the C1-71position. 12)Remove the translucent plastic cover over the terminal ends of the ECM blue C1connector by releasing the tabs on each end.

Where to find Blue ECM connector on LB7 Duramax?

8) Identify the blue C1 ECM connector.   Release the tabs on the wire end of the connector for access to the back of the connector. 9) There are small numbers printed on the connector body to identify the terminal positions.

Where can I get PTO connector for LB7 Duramax?

8) If the PTO connector is present, a PTO accessory kit can be obtained from GM (part#12497678).   The PTO accessory kit includes the PTO control switch, PTO interface cable, and instructions.