Is the GU6 3 : 42 rear axle a Posi?
Is the GU6 3 : 42 rear axle a Posi? Hey guys my 02 Tahoe has a GU6 3:42 rear axle with the tow package. Just wondering if that would be a factory posi unit. Please let me know if you can. Is there a G80 code in the glove box? If yes, you have a limited slip differential. If no G80, then no, you don't have an LSD. Yeah, GU6 only denotes the ratio. G80 will tell you if its a locker. Where is the rear axle on a GMC GU6? Click to expand... Look in the glove box,...