i have a 2007.5 lmm duramax, mods include: ppe stage 5 trans build, ats copilot, stage 3 snow water meth, mbrp down pipe, exhaust, intake, turbo elbows, race valve, tuning my duramaxtuner, egr blocker plate, airdog lift pump.
for the past few months my truck would take a long start and throw a...