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  1. 06-07 LBZ & LLY Duramax Powertrain
    Just bought a 2005 lly a few months ago. Has 150xxx miles. no tune,but has lbz mouthpiece, pcv reroute, and upgraded y bridge. When buying the truck it seemed perfect at the time, no excessive pressure in cooling system, coolant was orange, no oil mixed or anything and ran perfect. Drove the...
  2. 01-04.5 LB7 Duramax Powertrain
    Does anyone know the intake and exhaust valve lash adjustment spec?
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