How much coolant does a 2007 Chevy Colorado 3.7 take?

The cooling system of a 2007 Chevy Colorado with the 3.7-liter engine typically requires about 9 quarts (roughly 8.5 liters) of coolant for a full drain and fill, using Dex-Cool in a 50/50 premixed mix with distilled water.

What this means in practice is that the complete cooling loop—covering the radiator, engine block, heater core, and associated hoses—holds roughly 8.5 to 9.0 quarts of coolant. If you’re performing a flush or replacement, plan for the higher end of that range to ensure you can top off properly after bleeding air from the system.

Capacity overview

The following figures are typical values cited for the 2007 Colorado’s 3.7L inline-5 cooling system. Actual capacity can vary slightly based on factory options and how the system is drained and refilled.

• Total cooling system capacity (drain-and-fill): about 8.5–9.0 quarts (8.0–8.5 liters), including the radiator, engine block, heater core, and hoses.

Knowing this helps you estimate how much coolant to purchase and prepare for a complete refill. Always follow the manufacturer’s guidelines for the correct coolant type and mixing ratio.

Coolant type and mixing ratio

For this GM model year, Dex-Cool long-life coolant is the recommended type. Use a 50/50 premixed solution with distilled water unless your coolant product specifies a different ratio.

• Coolant type: Dex-Cool long-life (orange) coolant, compatible with GM engines of this era.


• Mixing ratio: 50% premixed coolant and 50% distilled water (or concentrate mixed per label with distilled water).

Using the correct coolant and mix helps protect against corrosion and overheating, and it maintains proper freeze-thaw resistance in varying climates.

Filling and bleeding the cooling system

After draining, refilling and bleeding are essential to remove air pockets that can cause overheating. Follow these steps to ensure a proper fill.

1. Make sure the engine is completely cool before starting.


2. Place a drain pan under the radiator and open the drain valve to remove as much old coolant as possible.


3. Close the drain valve and begin filling through the radiator neck with a 50/50 Dex-Cool mixture.


4. Leave the radiator cap off or loosen it slightly to allow air to escape as the system fills.


5. Start the engine and set the heater to the hottest setting. Run at idle until the thermostat opens and the upper radiator hose becomes hot.


6. Topping off as needed: once air bubbles stop, top off the radiator and the reservoir to the correct levels with the premixed coolant.


7. Replace the radiator cap securely, then check for leaks and re-check coolant level after the engine reaches normal operating temperature and cools again.

Safety note: avoid opening the cooling system when it’s hot. Wear eye protection and gloves, and keep a proper distance from hot surfaces and steam.

Summary

A full drain-and-fill on a 2007 Chevy Colorado with the 3.7L engine typically requires about 9 quarts (approximately 8.5 liters) of Dex-Cool coolant in a 50/50 premixed solution. Plan accordingly, use the correct coolant type, and follow a careful bleeding procedure to ensure a proper fill and reliable cooling performance.

How much antifreeze does a 2007 Chevy Silverado hold?

The 2007 Chevy Silverado coolant capacity varies by engine size, but common capacities are around 12.7 to 13.4 quarts for the 4.8L or 5.3L V8 engines with automatic transmissions, and up to 14.1 to 14.9 quarts for the 5.3L V8 with air conditioning. The 6.0L V8 engine is larger and has a different capacity range. Always confirm the specific capacity for your truck's engine by checking its owner's manual or a service manual. 
You can watch this video to see how to fill the coolant in a Chevy Silverado: 46sjimi breezeYouTube · Nov 30, 2021

Engine	Transmission	Coolant Capacity (approximate)
4.8L	Automatic	12.7 liters / 13.4 quarts
5.3L	Automatic	12.7 liters / 13.4 quarts
5.3L	Automatic with A/C	14.1 liters / 14.9 quarts
6.0L	Automatic	14.0 liters / 14.8 quarts

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This video explains how to check the coolant level in a Chevy Silverado: 1m1A Auto: Repair Tips & Secrets Only Mechanics KnowYouTube · Oct 23, 2018

How many gallons of coolant do I need?

You will likely need between 1 and 2 gallons of coolant concentrate to mix with an equal amount of distilled water for a 50/50 solution, but the exact amount depends on your vehicle's cooling system capacity, which can range from 3 to 7 liters (or about 0.75 to 1.75 gallons). It is best to consult your owner's manual or purchase a slightly larger quantity, such as two gallons of concentrate, to ensure you have enough, as some systems can hold more and you may need extra to top off. 
How to determine the right amount

• Check the owner's manual: This is the most reliable method, as it will state the exact capacity of your vehicle's cooling system. Look for information under "fluid capacities". 
• Estimate based on engine size: If you don't have the manual, you can estimate that 4-cylinder engines generally require between 1 and 2 gallons of a 50/50 mix. Larger engines will need more. 
• For a complete flush: If you are doing a full coolant flush, you will likely need more concentrated antifreeze. You can start by adding about 4 gallons of concentrate to a system that holds 8 gallons total, as you can't drain all the old coolant, and then fill the rest with distilled water. 
• For topping off: If you are just topping off the system, add enough to reach the "COLD" line on the overflow tank. The amount will be much smaller, likely less than a quart, says this Quora post. 

Important tips

• Always use distilled water: Never use tap water, as the minerals can cause corrosion in your cooling system. 
• Mix it correctly: Make sure to mix the antifreeze with distilled water in a 50/50 ratio for optimal protection. 
• Check the level after service: After refilling, run the engine and keep an eye on the coolant level, as air bubbles may need to be "burped" out of the system. 

How many gallons does a 2007 Chevy Colorado hold?

Fuel & MPG
342/456 mi. 19 gal.

How many quarts does a 2007 Chevy Colorado take?

6 quarts
Oil Grade: SEO23

Viscosity:	0W-30 (Below -29°C) 5W-30 (All TEMPS) - SAE 5W-30 is preferred.
Capacity:	6 quarts (with filter). After refill check oil level.
Torque:	19 ft/lbs (Oil Drain Plug)