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  1. DAVe3283

    Trilingual Cluster?

    My brother's Suburban had the cluster do that too. First time we'd ever seen anything like it. Thought it might have been the steering wheel controls or wiring, but after swapping clusters it followed the cluster, not the vehicle. He ended up going with a Dorman replacement that has been...
  2. DAVe3283

    Downloading Older Versions of EFI Live

    That I don't know. Sent from my FlashScan V2 using Tapatalk
  3. DAVe3283

    Downloading Older Versions of EFI Live

    I still have an extensive collection of older versions, but once you've updated an AutoCal or V2, you can't really downgrade them. So if that's the problem, an older copy of EFILive won't help. Sent from my FlashScan V2 using Tapatalk
  4. DAVe3283

    Lb7 radiator

    So, this is probably what I get for posting that my Mishimoto has been perfect, but it sprung a leak where the core meets the tank on the left side. Apparently their older stuff isn't any better than their newer stuff. :/ Put a brand new OEM radiator in while Mishimoto replaces this one. I'm on...
  5. DAVe3283

    Twins with Twins, Anyone?

    I bet you don't need that torque with an aftermarket press-on damper. The factory damper was slip fit with a tiny pin, not even a key. The crazy torque was to help clamp it with the giant washer and stop it from spinning, IMO. Sent from my FlashScan V2 using Tapatalk
  6. DAVe3283

    The stand alone TCCM 08 LMM, the last hurdle

    It isn't uncommon for new GM modules to come unprogrammed. If you could get a dealer to flash the "new" module, it may we'll work. Sent from my FlashScan V2 using Tapatalk
  7. DAVe3283

    LLY - Cracked piston

    There's a bypass valve in the 2020 oil cooler, but nothing that looks like the part you found. I can't think of anything in my motor build that was a pin that small, but it is hauntingly familiar...
  8. DAVe3283

    Leaking coolant

    I agree, probably coming from somewhere else. Coolant will wick into the gap between the head and block and make you think it's coming from the head gasket. Follow the leak uphill along the gasket and see if you can find the true source. I did have a LB7 head gasket leaking externally, but not...
  9. DAVe3283

    truck towing pictures...

    Used the LB7 quadrasteer Suburban 2500 to pick up a too-cheap-to-pass-up mildly wrecked LLY. I didn't have a clamp on the heater hose (and even got a clamp out to put on it, then forgot) and on a long climb blew the hose off, dumped all the coolant. Ended up having to drive a bit without...
  10. DAVe3283

    LLY - Cracked piston

    If yours doesn't have a recess for the o-ring, then tightening the sensor all the way down will destroy the o-ring. I see they offer 2 kinds of sensors for the Duramax, one was tapered, and one with the o-ring. Usually the female side of a straight-cut o-ring fitting has a recess for the o-ring...
  11. DAVe3283

    LLY - Cracked piston

    Not sure on the LLY, but on my LB7 I'm pretty sure it was a tapered thread, so just throw some thread sealant on and done. You might measure the sensor / block to determine if it is a tapered thread or not. If it is a straight cut thread, then there probably should be an o-ring.
  12. DAVe3283

    LML fan clutch on an LLY?

    I've been toying with the same idea, but I'm not sure if they physically interchange. You can get a lower temp fan clutch for your LLY and that should help. I put a Hayden in my LB7 and it made a big difference. Kennedy Diesel sells a low temp unit that's supposed to be better than the Hayden...
  13. DAVe3283

    2007 NNBS AC Issue

    The fan clutches are known to wear out. If the truck overheated without the fan roaring, I'd wager yours is bad. The A/C on all these vehicles is bad when stopped and idling. Even with a working fan clutch, the fan RPM is just too low at idle, IMO. Sent from my FlashScan V2 using Tapatalk
  14. DAVe3283

    New LB7 Owner

    The LB7 vents the PCV down the right front of the motor, and that can accumulate and run down onto the skid plate. Especially if the oil separator/drain is not working. You're probably just going to have to pull the skid plate and clean all the oil off the motor, then see where it is coming...
  15. DAVe3283

    Cranks but won’t start

    If the DPF was so clogged it wouldn't start, I would think it would crank fast then start slowing down almost immediately. The "change fuel filter" message can be triggered by low rail pressure. That is usually caused by a dirty fuel filter, but it can be a failing CP3 or injectors, or a...
  16. DAVe3283

    LLY - Cracked piston

    For what it is worth, the GM dealer sold me the following bolts, but I haven't installed it yet to verify: Long bolt (have 2): 11588694 Medium bolt (have 3): 11515760 Different medium bolt (have 1, forget why): 11548821 Short bolt (have 3): 11548820
  17. DAVe3283

    Time to Rebuild

    That's why my Suburban has the stock LB7 exhaust. Though I run a tune, so it still moves out. If you're anywhere near stock power, why spend a ton of time and money making an aftermarket exhaust quiet when the stock one will do what you want? Just brace yourself for the amount of time it will...
  18. DAVe3283

    LLY - Cracked piston

    Exactly, so unless PTW changed dramatically (e.g. forged pistons) then measuring the GM way (without rocking) will lookup to the correct gasket. I could be wrong about the cylinder pressure forcing it straight, on further thought. That is the whole deal with a butterfly valve/throttle: the...
  19. DAVe3283

    My Country Boy Limo. 06 LBZ

    Man that sucks, to be so close to getting it back then have some douche smash it up and get away. I've never had anything that valuable or with that much sweat equity stolen, but I can tell you thieves make my blood boil. Hope you don't have to fight too hard to get the insurance to make it right.
  20. DAVe3283

    LLY - Cracked piston

    I somewhat disagree with rocking the piston. While that is the farthest it could stick out, it won't do that in use due to cylinder pressure. Static compression is 300+ PSI on a Duramax, and that will keep the piston from getting completely cockeyed and one edge hitting the head, IMO. There will...
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