Have a 2005 1500 5.7 hemi 4x4
It shakes when I am in idle and gets worse when I accelerate at low rpms and gets less noticeable at higher speeds/rpms. When I let off the gas pedal the shaking lessens or disappears altogether at ANY speed so I know it is not a tire balance problem. Please help!!!

 

do you mean the engine shakes like its gonna stall, or the truck shakes while moving?????

 

When is the last time you had a tune-up done? Plugs are due every 30kmi! Sounds like plugs to me. You don't always feel the roughness of the idling engine when you are at higher speeds and are coating because the engine is actually higher than idle, somewhere's between 1500-2000rpms which would smooth it out.

I'd first check your plugs and air filter. If it isn't your plugs, then your plug wires/coil packs could be of issue.