I have a 1999 Blazer that has 143k on it. Its in good shape, very solid, no rot. I have put new shocks on it and I know the pitman arm has a very slight amount of play. Anyways I have noticed when I hit bumps that the body feels "Wiggley". Before this I had a 99' Suburban with 220k that did not do this. It feels like the frame is twisting or the body is wiggling on the frame. It just feels sloppy to me. This is not a steering related issue as the steering does not wiggle of shake or bounce when I hit a bump it feels like it's in the body. My C4 corvette does the same thing and those are known to have a "Flexible" frame due to the design. Hence my question about the Blazer frame/body mounts. My Caprice with 200k doesn't do it either and that is also a body on frame vehicle. Any ideas?

 

Ball joints and tie rod ends will also give a "wiggley" feeling over bumps. Have the front end thoroughly inspected. Your suburban and caprice are tanks. Your corvette is a cheetah. Your blazer should ride like they spent a drunk night together.

 

LOVE the analogy, haha I will have to take a close look at the ball joints. I know the tie rods don't have play but I'm not 100% on the ball joints. I did have to clean them out to force grease in as the old grease hardened up. I was able to quiet the squeaks from the ball joints but maybe them being dry before I got the Blazer had took it's toll already.