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Discussion Starter · #1 ·
Hey everyone, 05 LLY 479xxx.. just bought the truck tuned with a banks six gun tuner. I was running tune 5 on the tuner and was driving down the road without issue, all of a sudden “service brake system, service 4wd and service abs” lights all came on and the truck turned off like someone switched the key off... will NOT communicate with any scanner but I have power to everything. Obd2 has power but reads “cannot communicate is key on?” With a scanner... no indicator line on shift indicator screen, no crank no start. All fuses and relays are working and good. My best guess is the tuner and mile combination overworked the ecm and killed it. Any advice appreciated
 
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