Trouble code 455

Discussion in 'Trucks and Trailers' started by QuadRacer041, Oct 27, 2010.

  1. QuadRacer041

    QuadRacer041 LawnSite Senior Member
    Posts: 365

    I have an 06 2500hd crew cab. My truck has been throughing a code 455; large leak in evap system. The info center on the dash tells me to tighten fuel cap I had this problem back in the spring. Put a new cap on and I got the code once more after that then it stopped. Now for like the past month or so it has been doing it again. I wonder if it has something to do with the colder weather. I any case does anyone have any ideas on what it can be? Or where to start looking?
  2. Keith

    Keith LawnSite Gold Member
    Posts: 3,977

    I'd first look at the evap canister for a leak. Sometimes hoses pop off. You ever catch a whiff of raw fuel at a stop?

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