not without a lift. 30's or 31's will fit as long as you don't articulate too much. You can trim to fit them better and 33's will require a 3 or 4 inch lift with minor trimming. If you go that route you will also need a transfer case drop or slip yoke eliminator to fix your drive line angle.
20 gallon
It is on the bottom of the washer bottle.
Yes.
The grand Cherokee is a body style, sport is a trim package that is used on all jeep models(wrangler, Cherokee, grand Cherokee, patriot, ...)
There is no such part on a 1999 Jeep Cherokee.
P225/75r15 102s
The fuel pump is in the gas tank on a 1999 jeep Cherokee sport.
no
20 gallon
Not with out major modifications.
It doesn't have EGR
location of relay for heated o2 sensor 1999 jeep Cherokee sport
It is on the bottom of the washer bottle.
yes.
Yes.
It is either a Cherokee, Grand Cherokee, or Wrangler. The model codes are xj, wj, and tj.
Dealer.