How much coolant does a 2001 Chevy Blazer hold?
The typical cooling system capacity for a 2001 Chevy Blazer depends on the engine installed. A 4.3-liter V6 Blazer generally holds about 12–14 quarts (roughly 11–13 liters), while a Blazer equipped with a 5.7-liter V8 holds about 20–24 quarts (roughly 19–23 liters).
Engine options and cooling capacity
The 2001 Blazer offered two main engine choices, each with its own approximate cooling system capacity. The figures below reflect the full cooling loop, including radiator, engine block, hoses, and the heater core. For precise numbers tied to your VIN, consult the official GM service manual.
- 4.3L V6 (Vortec) — approximately 12–14 quarts (11–13 liters)
- 5.7L V8 — approximately 20–24 quarts (19–23 liters)
Actual capacity can vary slightly based on radiator size, auxiliary cooling components, and whether any aftermarket parts were added. When refilling, use the coolant type and mixture recommended by GM for your engine and fill to the level indicated on the expansion reservoir when the system is cold.
Practical considerations for refilling and maintenance
Coolant type and mixture
GM vehicles from this era commonly use Dex-Cool long-life coolant. If your owner’s manual specifies Dex-Cool, use it or an equivalent HOAT coolant compatible with your engine. Mixes are typically 50/50 with distilled water unless the manual instructs otherwise. Never mix different coolant types without verifying compatibility.
Refilling tips
When refilling after a drain or a coolant flush, follow these general steps: ensure the engine is cool, gradually fill the reservoir to the indicated level, start the engine and allow the thermostat to open, then top off the reservoir as needed until the level stabilizes.
Summary
In short, a 2001 Chevy Blazer’s coolant capacity varies by engine: about 12–14 quarts for the common 4.3L V6 and about 20–24 quarts for the optional 5.7L V8. Always refer to the owner’s manual or service manual for the exact spec tied to your VIN, and use the recommended coolant type and mixture when refilling.
