GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 2 of 2
  1. #1

    Default Problem with new truck

    I recently bought a 2003 Chevy Silverado 2500HD with the 6.0. I drive it home from the guy and when I get about 3/4 the way home a check engine light comes on. I scan it and a O2 sensor comes up so I clear the code and it stays off. The truck does have a Catback but it looks like it goes all the way up to the headers so I don't know if someone messed something up there. Then I leave the auto parts store after clearing the code and I go about 2 miles and the truck starts misfiring, so I go back and scan it and I have a multiple misfire code... the kicker is it does it like once or twice a day at random times, when I come to a stop it vibrates nice and good, then I drive a little ways and nothing. So, I bought an O2 Sensor and am unsure of the misfire problem. The plugs are new and the wires are too so I believe it is either Coil Pack, Fuel injector or something related to that system. Anybody have any suggestions? The truck has 111,000 miles on it. Thanks

  2. #2
    Legend unplugged's Avatar
    Join Date
    Sep 2006
    High Deserts of SoCal

    Talking Beware of posers

    Unfortunately the 'misfire' code can be one of the more difficult to get to the bottom of. Check out for info on O2 sensor codes. Did you get a MAP sensor code too? That usually indicates a vacuum leak when accompanied with misfire codes. DTC codes are not a diagnosis they only give you a place to start looking. If you have a mechanic you trust, you may be better off having a shop take care of it. Beware of parts swappers posing as mechanics.
    There is no way to happiness....happiness is the way.:yipi:  _vXMYypuKMJFw671uF2ZPhjez_j-atRmcjM2zQKpQi1JSsB75/burb1.JPG
    High Desert SoCal
    93 K1500 burb (personal) 350 AT 3" Lift 250K+
    02 Honda Civic LX
    Looking for a 1990's Miata for an engine swap

Similar Threads

  1. Ignition problem/Can't turn off truck with key!?
    By bradyjames in forum General Chevy & GM Tech Questions
    Replies: 5
    Last Post: 07-07-2010, 10:30 AM
  2. Crap!!!! Problem with wrong truck delivered at GM dealership
    By gatormike69 in forum The Coffee Shop ~ Chit Chat
    Replies: 32
    Last Post: 03-01-2010, 12:02 PM
  3. 96 Chevy tahoe problem fuel problem? Need help ASAP!
    By Fear58 in forum General Chevy & GM Tech Questions
    Replies: 5
    Last Post: 12-13-2009, 05:38 PM
  4. Replies: 0
    Last Post: 11-19-2009, 12:10 PM
  5. 1st. post...1st. truck problem
    By gypsy jim in forum General Chevy & GM Tech Questions
    Replies: 1
    Last Post: 04-13-2009, 05:46 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts