Yeah, most tire shops have tanks that are high pressure and dispense until the tanks are empty. As for full extension, it's easy for a tire shop, they have lifts, put it on a lift, juice up the shocks, and go on.
Local off-road shops have and do the same thing, if they can install a lift kit, they can lift it to extend the shocks and fill/top off the shocks.
Local off-road shops have and do the same thing, if they can install a lift kit, they can lift it to extend the shocks and fill/top off the shocks.