I have a 2003 1500 gmc sierra. The truck has 164,000 miles on it and when I was driving today I noticed the Transmission seemed to be acting up. I stopped at a red light and when I went to give it gas the truck would not engage at first and then it would. So I drove it a few more miles and all of the sudden the truck just stopped. It will shift into any gear but the Transmission will not engage in any gear engine just revs. Any advice would be appreciated. The Transmission is full and it does not smell burnt. Also there are no visible leaks anywhere. Thanks
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