My tailgate is rusty ,so I need to replace it . I have a 1999 Tahoe with lift up rear glass and drop down tailgate . It has the ZK3 option, which I've been told means the latch is different . The option list in the glove box shows if a Tahoe or Suburban has the ZK3 . My wife works at a GMC dealer , where I ordered a brand new one , only to be told 2 weeks later it's discontinued . Whatever happened to supplying replacement parts for 10 years after a model ends ? The 2000 Escalade & Denali used the same gate .