Generally
Original GM Radiator Cap
485 kr
Original radiator cap
Original GM Radiator Cap
Change the coolant every 5 years, the rust protection becomes worse with old coolant. You should have a mixture of 50-60% glycol, then you raise the boiling point, then you have good rust protection and not least you avoid a frozen engine block. The garage where the car is parked over the winter can be without electricity and heat. Every spring we get phone calls from customers with frozen engine blocks.