Cadillac Escalade
Released a year after the Denali, the Escalade utilized almost the same exterior and interior. But there were a few special touches that GM added to the Escalade to make it unique. One of the most obvious options was the hidden third-row seat it came with. This was not an option available on the Tahoe which shared its platform with the Escalade (via Edmunds).
The new OnStar system that offered roadside assistance was also heavily pushed on this generation of the Escalade. The 1999 Escalade was also the first SUV that GM offered with the new Lo Jack tracking service.