Would have been built with R12. Can be retrofitted to R134a.
R134a
It came from the factory with R12. I would suggest you convert it over to R134a. R12 is very expensive if you can find it. If it is low then you also have a leak that must be fixed.
10w30
The Jeep Grand Cherokee did not come out until 1993. It used a 5281090 Mopar filter.
10w30
R134a
Green
The old green in a 50-50 mixture.
Green up till the 2001. Red after 2002.
The grand Cherokee is a body style, sport is a trim package that is used on all jeep models(wrangler, Cherokee, grand Cherokee, patriot, ...)
The price of the Jeep Grand Cherokee depends on the year it was made, whether it is new or used, and if it it used, the condition of it. A new 2013 Jeep Grand Cherokee costs around $26000.
R134a