can depend somewhat on what climate you live in but 50/50 ratio is a
safe unless you are at the North Pole or see colder than -30f
Regular antifreeze such as, green, or red!
antifreeze coming from back of intake on 1993 gmc sierra
The 2003 GMC Sierra-1500 has a V6 engine.
The 2003 GMC Sierra-2500HD has 16 valves.
The 2003 GMC Sierra-2500HD has a V8 engine.
The 2003 GMC Sierra-1500 has 12 valves.
The 2003 GMC Sierra-1500 is a gas-powered vehicle.
The 2003 GMC Sierra-1500 has a 5-speed manual.
The 2003 GMC Sierra-2500HD has a 5-speed manual.
The 2003 GMC Sierra-2500HD has overhead valves (OHV).
The 2003 GMC Sierra-2500HD is a gas-powered vehicle.
The 2003 GMC Sierra-1500 has overhead valves (OHV).