90 K5 Rear suspension troubleshooting (bouncing)

[Dave101]

I have a 1990 K5 and the rear suspension is very bouncy and looking at the truck it seems to sag just a little in the rear. I can't tell if it's the leaf springs or shocks. Any suggestions?

 

[dhcomp]

Its the springs that make it sag, the shocks that make it bouncy. Replace all 4 shocks with decent quality ones, and get a zero rate add a leaf to help raise the rear back to even.

http://offroaddesign.com/catalog/Zero Rates.htm

 

[4X4HIGH]

Yep, springs support the weight and shocks control the bounce.

 

[Kenny78]

Is the suspension stock?

 

[Dave101]

I believe the suspension is stock and there is no added lift.
I will post some Pics tomorrow!
Thanks for all the Replies!

 

[Dave101]

Here are some Pics!

 

[trevmountain]

I didn't think k5's came with a stock ubolt flip. Maybe it was just the trucks that didn't. That shock is looking a little weird, almost bent. New shocks certainly wouldn't hurt. You can have them checked but if the truck's bouncing that is an indication of bad shocks.

 

[G-Force8]

Mine bounces out back,but its because the upper shock mount on the driver side has broken in two pieces. No shockage on that side.

I believe one of your shocks is shot. Looks like you have the expensive Edelbrock IAS shocks too.

I'd replace them with something a little less expensive

 

[6.2Blazer]

As already mentioned bad shocks typically cause the bouncing issue. However I'm looking at your pics and not real sure what the shiny u-bolt clamp thing on the springs is for (second pic down). It also looks like it's rubbing on the shock......this could be at least part of the issue?