GMC 3500 Class C motorhomes deliver proven power and performance. Pacbrake builds them even more powerful for towing and hauling. Eliminate embarrassing truck squat, excessive bounce, bottoming out, and ride instability with Pacbrake AlphaTM HD (5,000 lb) Air Spring Suspension Kits for GMC 3500 motorhomes. Command your ride with Wireless Air Suspension Controls. Or let 'em know you're there with Pacbrake Air Horns. GMC 3500 motorhome kits by Pacbrake: Leaders of the Pack.