PC9224A 1991 PONTIAC GRAND PRIX GOOD CHEAP TRANSPORTATION. At Timberline Auto it's always easy to find a great deal! For more info contact one of our friendly sales staff at (208) 523-4000 or to arrange a test drive come see us at 1580 E. LINCOLN RD. Idaho Falls, Idaho. To view all of our inventory please visit us at www.timberlineautosales.com.