transmission problems for 96 gmc z71
First off, I'm new here and just wanted to know if there was a problem with my transmission. so ever since a few weeks ago I started having problems with the gas pedel in which I had to get off the gas pedel at around 25mph because it would not go further and push it back down for it go past 25mph again, I suspect it would be the transmission slipping but really have no idea really what to next. Truck has 5.7l v8 with 220,000 miles. any help would be greatly appreciated.