got a question. ive got an 04 silverado with 125,000 miles on it and it gets a vibration between 60 and 75 mph its a 5spd truck ive checked everything feels like its in the right rear almost ive tried new tires, rims, brakes have no clue anybody know what it may be

 

Could be an axle.

 

i had the gear replaced at 85,000 axles were replaced then due to spider gear splitting the carrier and i havnt been to hard on it since only two trips to the track and i had the vibration before the track

 

Factory blemish's are known, pull the brakes off and spin the axle and check it with a dial indicator.

 

i check it out this weekend i guess its the only think it could be beside maybe the driveshaft balance

 

How about pinion angle or U-Joints?

 

vibrations suck!! i finally got rid of mine, and it was all improper wheel balancing, but i also have a tie rod end, it could be any of the following
1. wheel balancing
2.pinion angle and u joints (as suggested)
3. bent axle flange, or excessive runout
4.tie rod ends
5.wheel bearings failing, im sure theres more, but these where the top 5 suggested to me, good luck