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  1. T

    Help with converter choice.

    2002 Lb7 with a tow tune, tow 12K plus, 28ft toy hauler thru very steep and hilly terrain. Never had an issue with my OE converter but lost 5th gear after 460,000km's, so decided to upgrade, local single disc billet and have the trans built. Last summer, going up a hill, rolled into it and it...
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    Power differences between the LB7 thru to the L5P.

    Not sure if this goes here, but please move if needed. Wondered this for years but never asked, lol. I drive a lot of different diesels due to my job, and of course, notice the LBZ to the LML have a lot more power compared to the LB7 and LLY-all stock but of course, all bets are off tuned. I...
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    Best engine mounts?

    Mine are original and sagged and at 480K, my friend who drives like an idiot has torn 2 sets of GM mounts-the rubber seperated from the metal bracket. I drive sanely, no burnouts and tow. Will I be ok with the GM mounts or any other suggestions. I've seen some of the HD mounts and yeah, I like...
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    Late LLY, is it a LBZ question.

    Hey, my friend just put a late, 2006 LLY engine into an LBZ, wont' start, getting cam/crank errors. I've read these are basically detuned LBZ's until they could get the programming thru the EPA. On that note! Is the reluctor the 57 tooth or do they use the LBZ 58 tooth? What crank do they use...
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    6 speed to 5 speed swap!

    Long story short, I hurt 5th gear towing, so short on time, I can get a 6 speed with 100k, for a reasonable price. If I put my 5speed wiring and valve body in, will it work? If it will work, anything I should do while I am swapping it? TIA.
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    Who's the go to for custom tuning?

    2002 Sierra, I put an LMM engine with injectors, LLY computer, ficm, fca and fuel rail sensor, LB7 turbo. Need a good tow tune or I have the dp5 switch installed. I have efi live, so I can download the tune. Local tuner can't get it right. TIA
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    Help with loping idle, lack of power and poor mpg.

    I have an 02 that I repowered. Its an LMM long block and injectors, 2005 stock LLY computer, ficm, fuel pressure reg and rail sensor, LB7 stock turbo. Harness by Rick F and he sent me a file to remove the security, fix the fuel guage. Truck runs but of course, power is down due to it looking for...
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    Anyone have a scope pattern for the cam sensor? Have code p0341, no start after new engine.

    Just repowered a 2007 LBZ, customer brought me a supposedly running short block that had been hit, he put new covers on and front and rear. I put the rest together with new injectors, turbo, cp3 etc. Truck drove in. New engine won't start, It catches then nothing. I have code P0341. Tried know...
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    How do you adjust nsbu on an LLY?

    Searched and couldn't find it, some say to line up the marks but there isn't any, it has a cover over the front, AC Delco part. I put it it the middle of the adjustment, scanner says neutral or whatever gear I select, but even moving it while watching, it doesn't change. TIA.
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    What's the difference between the LMM and LLY fuel pressure regulators?

    They show up as different part numbers? Have an LLM setup going into an LLY. Thanks.
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    Piecing together an LLY, where is the wire connector the fuel pressure sensor?

    I found that the right fuel rail has the sensor in it, in the middle, but I can't find the connector on/in the wiring harness? Where the heck is it? TIA. Nevermind, someone cut the pigtail, sigh!
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    Has anyone run LMM Injectors in an LLY?

    Long story short, putting an LLY engine in my 02, have the custom harness etc, thanks Rick. I was going to make an LLY/LB7 hybrid but came across a smoking deal on an "LLY" van engine, the diesel shop said it was low KM's, and it is, its literally brand new, so what the heck. Swap all the LLY...
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    Anyone tested cams?

    Currently building my LB7/lly engine, tow use, using the stock turbo that has been ported, headers, down pipe. Anyone tested or have feedback on the Colt cams? Wagler? or anyone else? Do they work or just a waste of money. TIA.
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    LB7 weight?

    What does an LB7 weight with manifolds and turbo still attached? I'm guessing around 1200 lbs. Need to buy and engine stand. Thanks.
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    Has anyone run Poly body mounts?

    My 2002 2500HD needs new body mounts. The OEM rubber ones are stupid expensive, as I need all of them, which I seem to remember 8 of them. TIA.
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    Turbo upgrade 02 LB7 for towing.

    I found my truck lacking power around the 2K range towing, I am going thru it, converting to LLY but keeping the LB7 turbo. I've seen yellowchevy's post on porting the stock housing, wheels etc, and I was going to just port it, unless anyone has any other ideas. Trans is built so it can handle...
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    Anyone doing the 02 LB7 to LLY conversion harnesses?

    Been out of the loop for a few years, but back in as my truck just blew its head gaskets and want to run the LLY stuff. Anyone doing the harness conversions anymore? Thanks.
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    LB7: Which core to use, 5 or 6 speed?

    I have a 5 and 6 speed core to rebuild at my leisure, which one should I build? If you say the 6 speed, what should I do to the 5 speed valve body? Max output of engine will be under 500 hp, mostly used for towing 12K. Trying to save money, remember reading that an LML sic, TC is a good...
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    LB7: Help me spend my money for better power towing!!

    My truck just doesn't seem to have the get up and go I thought it would towing-first year owner of it. My brothers bone stock 09 will kill it towing the same weight or a lot more. :( Towing a 26 ft Prowler Toy Hauler, aprox 9-10K loaded, towing very hilly terrain, averaging 7 mpg. Truck has...
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