Coolant servicing

[rex]

H1 owners..... While cleaning the truck, I noticed that my coolant level is 1.5 inches below the cold fill line level although the coolant temperature warning light in my instrument pannel is not illuminating.. I checked all the lines but i can't find any signs of leak.. I don't know if im loosing bec i havn't check it since i bought the truck more than a year ago..I checked the fluid.. Its clear orange and its still good to (-40 level when i tested it). Now, what should i do? Is there a specific brand of coolant that you

will recommend? Should i make a 50 - 50 mixture with water? How is the procedure of filling the surge tank? Sound stupid but i really don't know and havn't experience this before? Is it just open the cap and fill? Your advice will surely be appreciated. Thanks

[humtek]

YES JUST FILL IT TO THE FULL LINE

PINK ORANGE COOLANT IS LONG LIFE .GREEN IS REG ANTI-FREEZE

YES BUY OR MAKE A 50 50 MIX

BUT IF YOUR ONLY ADDING A LITER OR SO YOU CAN AD STAIGHT COOLANT

IT WONT HURT.