Light Trucks
Maintaining Light & Medium Duty Truck Cooling Systems
In most cases, the cooling system needs to be checked visually about once a month to be sure that the coolant level in the overflow bottle is adequate. It is not necessary to open the bottle or radiator to do this! If it is low, add enough of the correct coolant type to bring it to the “full” line. In addition, some coolants need an annual pint of additive to prevent problems.
Here is a general guide as to what is the “correct” type for you truck, but check your owner’s manual to be sure.
By the way, it is best not to stray from the type of coolant that came in the truck from the factory.
Check your user’s manual
Conventional “green” coolants alone: (i.e. Prestone II, Peak, Zerex): Dodge trucks except diesels.
Conventional “green” coolants with SCA: Dodge trucks with diesels, Ford with diesels before 2003, GM with diesels before 1996.
Nitrited carboxylate “red-orange” coolants diesel GMC and Chevy trucks 1996 and newer.
Carboxylate “orange” coolants GMC and Chevy gasoline trucks 1996 and newer.
Hybrid coolants, some are orange some are yellow such as Ford / Zerex G-05: Ford 2003 and newer.
Check your user’s manual
Conventional “green” coolants alone: (i.e. Prestone II, Peak, Zerex): Dodge trucks except diesels.
Conventional “green” coolants with SCA: Dodge trucks with diesels, Ford with diesels before 2003, GM with diesels before 1996.
Nitrited carboxylate “red-orange” coolants diesel GMC and Chevy trucks 1996 and newer.
Carboxylate “orange” coolants GMC and Chevy gasoline trucks 1996 and newer.
Hybrid coolants, some are orange some are yellow such as Ford / Zerex G-05: Ford 2003 and newer.
GM 1996 and newer, Ford 2003 and newer, can operate up to 5 years or 100,000 to 150,000 miles between coolant changes.
All others: Change coolant every 2 to 3 years.
Change coolant if coolants have been mixed, or if any discoloration or problems are suspected. Its cheap insurance! Maintain SCA levels in diesels as specified.