Nearly 30 years of obsessively cataloging, photographing, and taking video of each part means it will fit your 2009 GMC Pick-up Truck Sierra 1500 1/2 Ton - Yukon Yoke - 8.5" Or 8.6" GM [Mech 3R] With A U/Joint Size And Triple Lip Design - Rear Differential Differential Pinion Yoke.

Period. No Hassle. GUARANTEED.

We cover round trip shipping if we make a mistake.

Check out the video below to view the Guaranteed Exact Fit process from start to finish!