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.
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.
2001 Buick Century coolant system repair costs
Low coolant in the system. Defective heater control valve. Clogged heater core.
The 2001 Chevy Venture typically requires about 12 quarts (or approximately 3 gallons) of coolant when performing a complete coolant system flush and refill. It's important to use a 50/50 mixture of coolant and distilled water for optimal performance. Always check the owner's manual for specific recommendations and guidelines related to your vehicle's cooling system.