My 2004 Silverado Z71 1500, has been making a clunking noise when i excelerate from a dead stop. Feels like its coming from the rear. Also feel a bad rattle in the front every time hit a bump. Can feel the rattle in the gas and brake pedals.

2000 gm. Serria 4x4 5.3 liter my wheel has a bad vibrating and shaking is it the steering knuckle

As far as the rear goes may be a u joint. have the fluid checked in the rear axle unt and while there down there with vehicle in neutral and the tires blocked grab hold of the drive shaft and try to move it up and down and side to side. if it moves around you have found your problem. as far as the front problem goes could be a number of things. the steering shaft that runs down from the steering wheel could be loose causing a rattle. you can check this by opening the hood and grabing where it comes out of the fire wall and see if it moves up and down. the stabilizer bushings could be worn. do you feel the rattle in you feet on the floor? a shock could be worn as well. hope this helps

The clunk sounds like it has a bad u-joint in the rear drive shaft. The rattle in the front may be a broken swaybar link.