I have a 2001 Chevy 1500 with 5.3 V-8 and at times it feels like some thing is hold my truck from moving freely almost like some thing is binding up a bit. At times when your going down a small grade and let off the throttle it will decrease in speed, going up a small grade it seems you need more throttle I drive the same road 2 times a day
Answer: Going down a grade and your Chevy truck is slowing down sounds like the transmission is in a lower gear. If this happens only sometimes, make sure to feel for a downshift as you start going down the hill. The truck should not do that. May sound silly, but make sure the gear shifter is in the D overdrive range.
While trying to go up a hill, does it need more throttle than you used to have to give it? Did this just start? Is or has the check engine light been on? Some possible causes again are the transmission, plugged fuel filter or your Chevy may just need a tune up.