They should it depends, the obvious is it a four or two light system, make sure bolts align prior to removal... remove light bezel and check mounting position of lower grille mounting bolts.
As a general rule GMC parts will bolt right onto a Chevy vehicle of the same model type. So yes that GMC grille will fit your '99 Chevy Tahoe if the year range and model type are the same.
YES.
bolted to the front core support in the grille.
this might help you: http://www.justanswer.com/questions/194b5-1987-gmc-suburban-4x4
you mean a Gmc Yukon Xl well they are simillar it just that I think that the Yukon XL is bigger than the Chevy suburban and the grille looks bigger
GMC Sonoma around 1991 - 1998 Ish,
Any 1978-87 El Camino or GMC Caballero
Same as chevy and gmc.... some uniqueness but for the most part the same
5on5
Behind the grill
u just bend over and fart loud and it should just fall off
A 1989 Chevrolet Silverado and a 1993 GMC Cheyenne are two totally different body styles. With that being said then no the body parts will not interchange