'Professional grade' should extend to the GMC steering rack, right? We hope so. After all, the GMC steering rack in your heavy-duty truck takes a beating on the trail, at the boat launch ramp, and on the construction site. When GMC moved away from recirculating ball steering and elected to use a GMC steering rack and the associated rack and pinion steering, there were quite a few skeptics. Would the GMC steering rack prove to be as durable and reliable as the old system? Time has shown that the GMC steering rack is a solid component, and anyone who has driven the new rack and pinion equipped trucks has no doubt realized the huge handling improvement they make. It's all thanks to the power GMC steering rack. Your GMC steering rack won't last forever, though. Over time, the seals begin to break down on the inside, allowing power steering fluid to leak past the internal components of the GMC steering rack. Once leakage begins, the power assist starts to fail, and the result is a GMC steering rack that 'catches' during turns-also described as 'flat-spotting.' Even for the capable do-it-yourselfer, installing a new GMC steering rack is a much better idea than trying to disassemble and repair your old GMC steering rack. There's a high degree of complexity involved in making your truck steer accurately, and your steering isn't something you want to be experimenting with! Bolt on one of our new or remanufactured GMC steering rack units and get your handling and steering performance back to 'like new' again.