03 burb new muffler and cel

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

  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??

  2. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    Did you check the codes?
  3. stephan

    stephan Rockstar 4 Years 5000 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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