Newest Gallery Photos

  1. Chevy Truck Forum

    Welcome To GMTruckClub.com!

    The #1 Chevy Truck Forum Online

    Online since 2004, we're the #1 Chevy Truck & SUV user community. If you have any questions about your Chevy or GMC Truck, SUV or Crossover, or just want to connect with other GM owners and enthusiasts around the world, you've found the best place on the internet to do that.

    Join Today ~ It's Free

    Registering is Free and Easy! Do it today and we'll see you on the forums soon!

99MY 5.7L Vortec catalytic converters - expected life? Tell your story

Discussion in 'GM Powertrain' started by triple-4x4, Jun 6, 2010.

  1. triple-4x4

    triple-4x4 New Member

    I have a 99 Suburban K1500 with 200k miles and I don't think the Catalytic converters have ever been changed. ( I have owned it for 90k miles )

    What kind of life can you get out of the factory CATs before the get plugged and don't flow correctly? I have what sounds like a exhaust back pressure sound coming from the drivers side when I rev the engine in the driveway while listening under the hood.

    Trying to track down a loss of power and what feels like a miss going up hill towing a load.
     
  2. ippielb

    ippielb Epic Member 5+ Years ROTM Winner 1000 Posts

    Cut them off! My truck only had 200k kilometers and i cut mine off, and it felt like a new truck after i did! If you have strict emission laws, i suggest high flow cats.
     
  3. robb_03

    robb_03 New Member

    Definatly get rid of them or change them. You can get high flow aftermarket ones if you need to for about $100 each.
     

Share This Page