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  1. LB7 - DuramaxDiesels.com

    Dec 24, 2025 · Lb7 Oil Level Switch - Struggling with Pin 70 2002holding Mar 3, 2025 Replies 3 Views 376 Mar 4, 2025

  2. Tune Library - DuramaxDiesels.com

    Aug 17, 2024 · LB7: Looking for a stock and a tow tune. strokerz Nov 21, 2019 Replies 10 Views 3K Nov 26, 2019

  3. LB7 build/ LLY swap - duramaxdiesels.com

    Sep 15, 2024 · Recently bought a wrecked lb7 for dirt cheap from a friend. Pulled the motor, stripped it to the block and sent it to the machine shop to be hot tanked, honed and new cam bearings. In the …

  4. LB7: - Fuel in oil and oil leak | DuramaxDiesels.com

    Oct 17, 2011 · What year is your truck? Sounds like a LB7, they have the most problems with fuel in oil. If it is a LB7 more likey it's injectors. I have never heard of the cp3 putting fuel in the engine oil but it …

  5. LB7 - Ultra Reliable 600 RWHP Build - DuramaxDiesels.com

    Feb 5, 2021 · Thinking about long-term plans for my truck (2003 CCSB 4x4 LB7). Let's say the goal is 600 rwhp (or enough to run 7.99 in full street trim in a 7000 pound truck) and to be as reliable as …

  6. LB7: - LB7 fuel pressure relief valve. | DuramaxDiesels.com

    Jul 22, 2017 · Well this is the elusive LB seven fuel pressure relief valve. It's so special that the dealer wants about $700 for it. It's only sold as part of the fuel rail junction block. None of the shim kits or …

  7. LB7: - Found my fuel prime problem | DuramaxDiesels.com

    Aug 29, 2016 · As you all know, the drive back from Mizzouri with the Q-steer bed wasnt too fun due to my truck losing prime at idle. Rebuilt existing filter head -- helped but didnt solve problem New filter …

  8. LB7: - stock CP3 hp limitations | DuramaxDiesels.com

    Aug 28, 2013 · Anyone know at what point my stock cp3 maxes out for hp? I hear stock injectors will do up to 550-600hp but will the cp3 keep up with a lift pump? Im just putting everything in my sig on the …

  9. LB7: - Fuel Pressure specification | DuramaxDiesels.com

    Oct 12, 2012 · Does anyone know what the fuel rail pressure should be at idle?

  10. LB7: - Fuel in oil and no visable leaks | DuramaxDiesels.com

    Jul 3, 2015 · Been fighting a oil dilution problem for a while now and it keeps getting harder to find the leak.No return or injector leaks visible with covers off and idling at 160mpa so I added dye and …