Owner's Manual
Page 375
...) or 24 months, whichever occurs first. Damage caused by the use of clean, drinkable water and DEX-COOLR coolant will require change sooner -- When the differential is important that you use only DEX-COOLR (silicate-free) coolant. A 50/50 mixture of coolant other than DEX-COOLR is added to the system... lubricant to 1/2 inch (12 mm) below the filler plug hole. In addition, the engine coolant will : D D D D D Give freezing protection down to 265_F (129_C). When the differential is filled with engine overheating, see "Engine Overheating" in the Index.
...) or 24 months, whichever occurs first. Damage caused by the use of clean, drinkable water and DEX-COOLR coolant will require change sooner -- When the differential is important that you use only DEX-COOLR (silicate-free) coolant. A 50/50 mixture of coolant other than DEX-COOLR is added to the system... lubricant to 1/2 inch (12 mm) below the filler plug hole. In addition, the engine coolant will : D D D D D Give freezing protection down to 265_F (129_C). When the differential is filled with engine overheating, see "Engine Overheating" in the Index.