2009 Silverado. I took off the old rack and started compressing the coils. I used a tool developed for this by O'Reilly's. It wasn't enough. Two grown men couldn't twist the latch tight enough to grab this bad boy. I returned those shocks and paid a little extra to put the Monroes together. So much easier. These shocks may be good, but I couldn't safely remove the old ones from the spool, so I reinstalled them.