There's a lot of potential problems with the recall work and pricing...check around on this site and you'll see many posts outlining this.
In many cases, dealers (yeah, Workhorse certified dealers) told folks that while Workhorse covers the cost of the calipers, they'll likely also need new rotors and pads, which will be an extra $2400. That's usually complete hooey.
To change the calipers, they have to take the brake system apart, which is covered by Workhorse. Fresh pads were about $200 for a complete set. They already have to take the old pads out to do the work, so there should be NO additional labor charge, even if the pads need replacing. Same for the rotors...once the wheels are off, and the calipers are removed, that's about 90% of the work to get the rotors off, and rotors are cheap, IF they even need to be replaced at all.
First place I called when I had mine done told me that there would likely be up to $2,000 not covered by Workhorse. I kept dialing ;)
Ended up having recall done, got fresh pads on the front which Workhorse also agreed to pay for. Some of these shops are just trying to completely rip off unsuspecting and/or uneducated consumers. As soon as I questioned the woman who told me it would likely be an extra $2,000, she started stuttering and sputtering...said I'd have to talk to the service manager, who wasn't in, but I needed to book immediately because they were very booked up, dangerous for my family, etc etc. Basically a shyster...and she had a well-developed speech.
Definitely have it done by Workhorse, and there are tons of Workhorse shops out there. Don't forget, workhorse chassis were used for a very wide range of applications, and was a very popular truck chassis, so don't limit your search to RV dealers.
As mentioned before, go to the Workhorse site, register, and you can search for shops in your area.
And as stated above, when you register, the site will tell you if the work has already been done, and all you need is a bleed...and NOT of the "wallet" type ;)
Jim