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  1. Duramax Seventh Generation: 2020+ (L5P)
    Now that its turned cold I start truck and within 5 seconds its idling at 1000 rpm's. I apply brake and it doesn't reduce idle. I don't think to going into regen but maybe it is. I don't know the requirement for automatic high idle and not sure if truck came with it. Doesn't engine temp need to...
  2. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    Hi all, looking for some help with my 06.5 lbz. I have the factory high idle on it and last night it got down to about 28° and was like 29° when I started it this morning, but the truck would not go into high idle. I moved my outside air temp sensor because it was right above the trans cooler...
  3. Duramax Second Generation: 2004.5-2005 (LLY)
    I want to wire in a high idle switch NC t disentangle get cold enough for the factory high idle to be enabled in my area. I've seen a kit but all that is in the kit is some wires. Well I have wire!!! They also have there install avaliable on pdf. So why couldn't I just make my own? Has...
  4. 6.5L Diesel Engine
    Hey Guy's hope everythink is good. Have a little Question to the 6.5 Engine. My Engine Idle ( Cold ) is with 600-700 rpm good. But is the the Hot and push the Gas Pedal a little bit down, is the idle Speed higher for ever 800-1000 rpm " why is he doing this ? It is to High... I have a...
  5. 6.5L Diesel Engine
    I have questions about the transmission, rpm and the codes that popped up. I’m not a mechanic, but I have a friend that did all the work on it. I have an ambulance that is a 1995 Chevy 3500hd, 134,000, 6.5 TD, 2WD, DRW, 4L80E automatic, Dana 80, HC7 axle rear 5.13 ratio, 225 70 19.5 wheels. I’ve...
  6. Duramax Sixth Generation: 2017-2019 (L5P)
    Hey all. Hoping to re program ECM ( I think ) to delay high idle kicking in when we have -40 weather. Called GM customer service and lady on phone said there was nothing that can be done. She consulted someone while I was on hold. Scenario is if I remote start or manually start truck, 8-10...
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