04lss

Hi All, The rear output shaft seal on my transfer case is leaking. I have tried looking for one online but there are a lot of different options and the descriptions dont help. I have a 1999 tahoe, with the auto transfer case. If anyone can provide me with a part number on rock auto or advance auto/autozone/napa, id be very grateful. for example: Rear; 4WD; New Process 241, 243 - 2nd Design Rear; with New Process 243C Transfer Case; 2 Speed; with Part Time 4WD; Boot Type; with 1.500 IN Width tsRear; BOOTED; NP 241C orRear; BOOTED; NP 243C