03 burb new muffler and cel

Discussion in 'General Chevy & GM Tech Questions' started by mtnbound, Feb 8, 2011.

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  1. mtnbound

    mtnbound New Member

    I just put a flowmaster 50 on my 03 burb 1500 5.3 and on the way home the cel or ses light came on. What would cause this??

    thanks,
  2. silveradotrailblazer

    silveradotrailblazer New Member 1000 Posts 100 Posts

    Did you check the codes?
  3. stephan

    stephan New Member 1000 Posts 100 Posts

    X2 on STB post on checking the codes. If you don't know how, then I would check & see if they ripped, wrecked, or ruint your 02 sensor when they installed the muffler.
  4. mtnbound

    mtnbound New Member

    it got worse, I had a problem with it idleing rough. I thought I had that under control but appearently not. This morning on the way to work I stopped to get a coffee and while waiting it started the random misfire crap again. Im done throwing parts at it so I dropped it off at the stealership and they will do a full diognostic on it in the morning. I think it was just a coincident that it came up at the time of the muffler.

    I will post up the problem and fix

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