Muffler size

Discussion in 'General Chevy & GM Tech Questions' started by stefman722, Aug 31, 2009.

  1. stefman722

    stefman722 New Member


    I searched but with no results. I am changing just the muffler in my 09 silverado 5.3 and am looking for the correct size muffler needed with the stock piping. Is it 2.5" or 3".

    THanks in advance!!

  2. CarpenterGuy

    CarpenterGuy Epic Member 5+ Years 500 Posts

    i'm pretty sure its 2.5 but i could be wrong
  3. 2ToNe04

    2ToNe04 Epic Member 5+ Years 1000 Posts

    thats what always thought, because on our models they are 2.5, but maybe its a 3 on the new truck im not sure.
  4. starsilverado

    starsilverado Rockstar 100 Posts

    um you better measure it to be sure
  5. dsfloyd

    dsfloyd Epic Member 5+ Years ROTM Winner 1000 Posts

    take a tape measure and measure the diameter, it should be 2.5 or 3 inches. If for some reason you can't do that measure around the pipe, if it is about 9.5 inches around its 3 inches and if it is almost 8 inches around it is the 2.5 inch.

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