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  1. Chevy Silverado Forum (GMC Sierra)
    My 2003 5.3 Silverado has no cats and a thrush welded muffler. Recently I had to drive a long distance so I replaced the Thrush with a stock muffler. After the trip, I put the Thrush back on, and the drone is much louder and a lot less bearable than before I reverted to stock. The only...
  2. Chevy Silverado Forum (GMC Sierra)
    Ok. I have 2000 Chevy c2500 RWD. Last year service engine soon light came on. Started running lean. Rough idle. Hard start. I changed the o2 sensors. All of them. Same thing. Changed fuel pump. Same thing. Replaced TPS. Same thing. Spark plugs and wires. No results. Ignition coil. Same...
  3. Chevy Suburban Forum (GMC Yukon XL)
    Hi, I threw a k&n cold air intake and I cut off my mufflers on my 2014 Suburban LTZ. It's been giving me a lean to rich error code. I bought an aftermarket muffler in hopes that would fix it. Do yall think that will help or will I have to go get a tune in order to keep my set up?
1-3 of 3 Results