08 Tahoe rear springs. #2773522 from Napa and it added 2" easy.
The rear wheel well measuring heights
Front of wheel 11.5" rear of wheel 14" Before measurements.
Front of wheel 13.5" and rear is 16", AFTER measurements.
Just Installed Marks 2.5" lift for the front. Just used the fronts with monroe quick struts that someone put on at some point. I just reused everything because it was easier and suspension didnt feel all the bad. I can always upgrade springs and shocks later. This mod is not tough to do again and it took about 1.5 hours and a 30 min alignment. (WAY OFF and even drove straight. Toe was .30-.40 inward) Caster was 3.5 - 2.3 and camber was -.3 - .2 got toe to about .05 - .05 ish. The upper ball joints with suspension loaded on the ground is damn near vertical. So I did not do upper control arm swap.
The ride overall just feels like a 2500 vehicle. The soft van feel is gone, and its firm and still comfortable. The rear springs made a good feel even with Monroe rear shocks for the trailblazer. I like the firm feeling, it lets me feel the road and handles better. Maybe not the best for offroading, but good for driving imo. With the front springs pre-loaded it doesnt seem to change much. Just the taller top heavy change when cornering and going over bumps. Ride quality is not hindered in any way.
Much better ground clearance and I feel like Im in a truck. Wife didnt complain about the vehicle being too high or ride quality.
Cant wait for spring to test it out with a Mini trail test up our driveway.

Bone stock

Just the rear springs. They settled a bit over a month. As expected.


This is front before the spacers installed. About 10 inches.

Front after spacers.

Installation before and after


Loaded suspension before

Loaded after

Just more pics
Before

After

Neighbors trailblazer also in background

Mine
