246 transfer case out of a 2003 Siera 2500 extended cab that was written off with front end damage Had a 4L60 transmission with a 6 litre engine A friend knew I needed one so he found this one and guaranteed it would work with my serial # Well I took it to a garage / Tonka in Edmonton to have it installed and the splines were different so I ended up buying a rebuilt for $1700 This one has 27 splines and I needed 29 The front drive shaft goes with it I