Shaking
 

I have a 2000 Silverado 2500 with the 6.0. When the truck sits at an idle, it shakes. The shaking gets worse, the warmer the truck gets. It feels as if it has a misfire, but doesn't. The check engine light never comes on for a scanner to pick it up, and luckily it never stalls. The shaking is also accompanied by a loss of power, but i'm unaware if the two are relative to each other. I have had multiple combinations of plugs and wires trying to solve the problem, with no relief. Anyone with input?

RE: Shaking
 

sounds like a broken mount, power loss is becasue of freedom of the engine, check the rubber in the mount

RE: Shaking
 

Pop the hood and power brake it, have sombody watch it if possible also check to make sure you don't have bosh spark plugs, same thing kinda on a mustang today at work bosh plugs present switched w/delco solved it never set of c/e light for misfire, wierd...

RE: Shaking
 

i would also check all of the mounts...