Other information:
Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the tailgate upper trim.
(Refer to Body - "Tailgate Trim")
3.
Disconnect the high mounted stop lamp connector (A).
...
Your vehicle is delivered with high quality ethylene glycol coolant in the cooling
system. It is the only type of coolant that should be used because it helps prevent
corrosion in the cooling system, lubricates the water pump and prevents freezing.
Be sure to replace or replenish your coolant ...