You can purchase a coolant flush kit from your local auto parts store for less than $10. It comes with directions.
You don't have to but it is a good opportunity to flush the system.
To flush the coolant on a 2001 Volvo XC, start by ensuring the engine is cool and then remove the coolant reservoir cap. Place a drain pan under the radiator and open the drain valve to allow the old coolant to flow out. After draining, close the valve and fill the system with a mixture of water and a suitable coolant flush product, then run the engine until it reaches operating temperature, allowing the flush to circulate. Finally, drain the flush solution, refill with fresh coolant, and bleed the system of any air.
Clean the reservoir and flush the cooling system.
A flush and new coolant is not a bad idea on a 7 year old vehicle - pressure test system to determine if there is a leak and if so where
pull the handle down
Every 5 years
11.7 quarts
It uses Dexcool.
11 to 12 qts depending if it has ac or not.
It would be best to go to bgfindashop.com and get a repair shop to do it for you. With the BG flush there is a cleaner put in and then the system is back flushed. The new coolant is added with a rust inhibitor.
Low coolant in the system. Defective heater control valve. Clogged heater core.
2001 Buick Century coolant system repair costs