I am a retired GM tech. I just don't have access to GM tech support any longer. I did locate the repair procedure. GM calls the Getrag 760 the "transfer case" which it is not a traditional transfer case as it is a separate extension of the transaxle. The seals are not called axle shaft seals, but rather "transfer case input shaft seal (right)." The passenger seal (part #22) on the exploded parts view is leaking. The vehicle has 63,000 miles. The transfer case MUST be removed, the case half must be separated as these seals ARE on the inside of the transfer case. In addition, the case half seal and left input shaft seal (transaxle to transfer case) needs to be replaced during the disassembly. Repair time is 6 flagged hours. Parts are roughly $120 and the rest is labor to R&I the transfer case. For an $850 repair, it's worth doing yourself, but ONLY if you know what you are doing and have the special tools to disassemble the transfer case.