what size tire should I use on '99 chevy suburban?

[Carrie TX]

should I use a 235 75 16, 245 75 16, 275 75 16, or a 285 75 16??

[D E]

Original Equipment Size: 235/75-15
Load Range XL

It all depends on what model you have and what size wheels you have. You can vary the size, you just need the same rolling radius so you won't affect your speedometer