[2000CAYukon]

I bought a 90 GMC K1500 Z71 Truck new back in Nov 1989. The Z71 package did not include limited slip (at least not in the 90 model year).

You need to look at the SPID label in the glove box. If you find G80, then you have limited slip.

Limited slip was standard on my 2000 Yukon with the towing package (not sure about 1993).

//2000CAYukon