How do you check the transfer case oil on a 1997 GMC Jimmy?

To check the transfer case oil on a 1997 GMC Jimmy, first ensure the vehicle is parked on a level surface and is in neutral. Locate the transfer case, which is typically mounted to the rear of the transmission. Remove the fill plug on the side of the transfer case using a wrench; the oil level should be just below the fill hole. If oil seeps out when the plug is removed, the level is adequate; if not, you may need to add the appropriate type of fluid until it reaches the correct level.