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07 chevy 2500hd

Discussion in 'Chevy Trucks' started by dlcs, Jul 17, 2011.

  1. dlcs

    dlcs 2000 Club Member
    Messages: 2,160

    I got a 07 chevy 2500hd 6.0 nbs, with the 6 speed hydromatic transmission. When youfirst start it up, especially after its been sitting awhile, it drives like its idle is running high. After you go a few blocks , everything is fine. Kinda like when its really cold out, is this normal, do they all do this?
  2. vegaman04

    vegaman04 Senior Member
    Messages: 378

    I would assume that it only happens after sitting and upon start-up, the alternator starts charging and higher rpm's are required.
  3. NickT

    NickT Senior Member
    Messages: 707

    Same thing here just one of those things doesn't take long to go back to normal