Join Date: May 2016
Location: Northern Virginia
In case anybody searches to find this, I got an answer from the manufacturer. The minimum height of the jacks for the 5000 lbs. version is 3". If your car is lower than that, you need to get it up (tee hee!) a little bit.
Hope this helps someone!
1996 Impala SS (Original Owner, owned again)
2014 Camaro ZL1 (Also original owner )