Thinking of adding larger block to rear, any difference?

Travis Whitmore · November 9, 2015

Installed machined aluminum 2" lift (1" spacers) I bought off eBay for $26.99. Now considering bringing the back up a little bit. I've seen some rear block/bolt kits going on line for $150 and some on eBay for $65. Whats the diff if any? Are they all going to be tapered? Should I use tapered ones? Thinking of installing a 2" rear block, if I'm not mistaken the factory one is 1.25, correct?

HondaHawkGT · November 9, 2015

A 3" block gave me 2" of rake with my leveling struts. You should have just about 1" of rake with a 2" block.

Travis Whitmore · November 9, 2015

With the 2" front level I've got .75" rake right now.

Big Whiskey · November 9, 2015

Yes, the factory blocks are 1.25". And yes, you'll want tapered ones. As long as they have good centering pins and new u-bolts, you'll be fine.

dougwtx · November 9, 2015

I used 3" ReadyLift rear blocks and their shock extensions on my 2015 double cab. They are tapered and with my 2" leveling kit, it has about 2" rake. I am not sure of the differences in the lower cost ones on eBay but I wanted to stick with well-known brands.

Travis Whitmore · November 9, 2015

Yeah, ready lift wants almost $160 which seems a bit much for what you're getting.

HondaHawkGT · November 10, 2015

I got mine from Zone Offroad. I highly recommend their U-bolts. You don't want to buy cheapies or chinese ebay ones.

http://zoneoffroad.com/zone-offroad-products-suspension-leaf-spring-u-bolt/4037

http://zoneoffroad.com/zone-offroad-products-3-inch-tapered-lift-block-9-16-inch-pin/u3030

SILVER SLED · November 10, 2015

After installing the Rough Country 2" front lift, I felt the front sat just a little to high. So I installed the rear block from the RC 2 1/2" level kit. You can buy the rear blocks seperate for about $56 including U-Bolts and nuts from RC.

HondaHawkGT · November 10, 2015

Also don't forget your rear shock length and travel won't work well with the new blocks. Some guys will try to get away with it but if you drive offroad and the back end kicks up, the shocks will over-extend. The result won't be good.

You can either install shock extensions or buy longer shocks. I went the longer shock route. I was able to talk to a Rancho rep and he figured out the exact model number for my setup.

Kerrslight · November 10, 2015

I got this exact kit. I have 2.5" front level and the front sat just a tad higher than the rear. Added the rear blocks and the rear is now about 1" higher than the front. Just what I was looking for. Had it for a while now and haven't had any problems. Make sure to torque to factory specs

http://www.ebay.com/itm/GMC-SIERRA-1500-2WD-4WD-1-Rear-Leveling-Lift-blocks-U-bolts-CH-1500-R1-/121381283461?hash=item1c42e36685:g:tx8AAOxyPFJTmJQ3&vxp=mtr

HondaHawkGT · November 10, 2015

Stacking blocks is a bad idea.

Kerrslight · November 10, 2015

Stacking blocks is a bad idea.

Probably not the best idea, but there are certainly worse things to do. I mainly drive on the interstate and in the city. At some point I will probably just switch to one solid block, but as long as its installed correctly and torqued to spec, shouldn't have any problem. Now if it were a larger block, I could understand why thats a bad idea.