Engine Coolant Reservoir. Dual Coolant / Windshield Washer Fluid Reservoir. Coolant Reservoir. Notes: w/Liftgate Wiper System | Combined Coolant and Washer Fluid Reservoir. 1995 GMC Safari Engine: 4.3L V6; w/Liftgate Wiper System | Combined Coolant and Washer Fluid Reservoir; Position: Front;.