Surfliner44
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- Dec 14, 2012
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Hello I know little to nothing about cars and well my friend drives a 2003 GMC dually Sierra Duramax truck with turbo and I believe an exhaust system, and I'm in love with the sound it gives off... Like shortly after starting the truck a continuous air hiss will come out of the muffler 5 seconds after idling, and every time he pushes the accelerator a loud air spit comes out of the muffler and the continuous air hiss goes away as the truck moves (why is that?) Then once he lets off the gas and the truck goes back to idle the continous air hiss comes back. I'm curious. His truck is probably the vehicle that stands out the most in our high school parking lot lol either that or my 2003 Ford Crown Vic.