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Thread: Tuning help LC9 5.3

  1. #1
    Potential Tuner
    Join Date
    Apr 2021
    Posts
    2

    Tuning help LC9 5.3

    Learning on the fly but i worked on a tune and first start of the day it works perfect and then I shut it off, once I restart it idles at 3500rpm?

    2008 GMC Sierra 1500 5.3

    DOD delete
    Texas speed truck cam stage 2
    BTR beehive springs
    ARP bolts
    hollowed out cats and cat back exhaust

    can anyone give me any input
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