Hello I recently replaced the air compressor and rear shocks on our 2012 Suburban LTZ.

I can hear the compresor come on and turn off after a few seconds after turning on the truck. If I add some weight to the trunk it’ll run for a bit longer.

However, no matter the scenario, after the compressor runs and I check the bags in the air shocks, they don’t seem to be filled with air. I can squeeze the bags fairly easy. I’ve spent hours looking up videos online and nobody seems to show how the air shocks should fill up with air after they’ve been replaced.

Curious as to how one would make sure that the air shocks are actually filling up? I have no codes on my dash.