I have a 1992 Chevy S-10 Blazer. Note: It does seem like I am having to push a little harder on the brakes to stop.

When I begin to accelerate there is a fairly loud squeaking that speeds up as the truck does and then stops once I hit around 20 mph. I'm pretty sure that it is coming from the rear of the truck. I don't know if it is the brakes or not. A brake shop is looking at it tomorrow and I am concerned it could be something else, but the "salesman" tries to get me to buy something I don't need.