yeah there just some GM 3.42 pinnion and ring gears.they didnt fit right in my car so im was going to have to a spacer for the ring gear but im getting some 3.72 that i need a spacer so i just put teh 3.00 in for winter. but im not sure on the millage on them but they look preaty much new. i tryed getting the number and the GM stamp in the pics but the camra but it was a lil hard. so judgeing from the pics you can startmaking offers

http://img168.imageshack.us/img168/4792/0000445ls2.jpg
the two gears coming together

http://img239.imageshack.us/img239/6370/0000447cv2.jpg
pinnion

http://img205.imageshack.us/img205/2888/0000454pm6.jpg
numbers on pinnion, blurry but you can make out the GM stamp

http://img243.imageshack.us/img243/1428/0000455nd2.jpg
ring gear

http://img205.imageshack.us/img205/4238/0000459xk5.jpg
together

also i will take the barring off if you want