There are 2 transmission dipstick tubes available from GM. but which is right for me? there is part#15999402 which one mean GM guy said came up under my last 8 vin digits which is SK146285 and then there is part# 15735192 which comes up for 96+ . is the part# 15735192 a better revised tube coated with anti - corrison protection? whats the difference?

 

15999402 is the revised design for your year as stated in TSB #99-07-30-004.