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2007 - 2013 (GMT900) Section for all discussion related to the 2007-2013 Chevrolet and GMC trucks.

Weird problems need help

Old January 31st, 2017, 1:52 AM
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Join Date: Jan 2017
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Default Weird problems need help

Hey guys, I hope you guys can help me out I'm having a couple problems but to start I have a 2007 Silverado LTZ 4x4 with a 7.5 inch Rough Country lift on it. I don't know to much about it cause that's how I bought the truck. 1st issue - when I put the truck in reverse and if I hit the gas to hard it feels like it disengages and a loud grinding noise and truck won't go any where.( grinding noise as in its spinning and scrapping until it slows down) truck isn't moving. I put it in drive and reverse and it's fine if I coast out but if I hit the gas I wanna say it does it at like 30% pressure of gas pedal. 2nd every once in awhile from a dead stop I start to drive and my speedometer will drop to zero and truck will not shift out of first gear but when I come to a complete stop then it works. 3rd my cel just came on and I got P0449 so emissions code what's the common fix for this. The first 2 issues do not throw any codes or anything and they got me stomped hope you guys can help me out thanks in advance
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