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  1. 2017-19 GM T-K2 Platform Powertrain
    Hello all, I’m looking to upgrade from my ‘06 LBZ to a ‘17 L5P (~100k miles). The one that I am currently looking at has a service note for injectors being replaced. I called the sales guy to ask about it, to which he responded that they replaced injectors on cylinder 4 & 8. I’m hesitant to...
  2. General Discussion
    I want to clean my injectors on my 2018 L5P Denali I pulled 4 fuses from inside the engine fuse box and can’t get the fuel pump to stop pumping fuel. I’m doing the gallon of Diesel with half Bottle of Top Engine Cleaner I disconnected the 2 fuel lines and hooked up 2-4’ lines into a gas can...
  3. General Discussion
    I have a 2020 L5P duramax high country currently 35k miles still under the bumper to bumper warranty. I get a check engine light on the dash and then two messages reading vehicle power is reduced and a don’t stop driving like it’s going into regen the def gauge reads 3/4 full the truck has never...
  4. 2017-19 GM T-K2 Platform Powertrain
    I was supposed to leave for a trip across country with our fifth wheel tomorrow morning I took our truck in to have it serviced as we are going to put on about 5000 miles round trip. The day before I took it in the check engine light came on for a couple hours then went off the dealer called me...
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