- I just bought and put in a Helix Power Tower in my 94 Gmc Sierra with the 5.7L engine in it. After i did so my car started to make this weird sound that seemed to be comming from inside the cab but actually is comming from somewhere near the lower part of the engine , it almost sounds like possibly a "Fan" running or like there is an Exhaust leak somewhere? I put this on myself because it seemed easy enough and i dont know if it's the product making the noise or is it my engine.

If anyone has any information about this product please let me know what u did about this problem .

Thank You

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