2016 Chevrolet Silverado 2500HD Coolant Capacity & Type

The 2016 Chevrolet Silverado 2500HD cooling system holds approximately 16.3-17.0 quarts (15.5-16.1 liters) of coolant for the 6.0L V8 and 24.3-24.8 quarts (23.0-23.4 liters) for the 6.6L Duramax Diesel.

Quick Answer

• Total Cooling System Capacity:
  • 6.0L V8: 16.3-17.0 Quarts (15.5-16.1 Liters)
  • 6.6L Duramax Diesel: 24.3-24.8 Quarts (23.0-23.4 Liters)
• OEM Coolant Spec: DEX-COOL® (Orange, OAT - Organic Acid Technology)
• Mix Ratio: 50/50 Pre-mix or 50/50 concentrate with distilled water

Capacity by Engine Option

The coolant capacity for your 2016 Chevrolet Silverado 2500HD varies slightly depending on the engine installed:

Always consult your owner's manual for the most precise capacity specifications for your specific vehicle configuration.

Flush Interval

Maintaining your cooling system is crucial for the longevity of your engine. The recommended flush intervals for a 2016 Chevrolet Silverado 2500HD are:

• Normal Duty: Every 5 years or 150,000 miles, whichever comes first.
• Severe Duty: If your vehicle is frequently used for towing, hauling heavy loads, or driven in extreme temperatures, it's advisable to inspect your coolant more frequently and consider shortening the flush interval.

Regular coolant checks should be part of your routine maintenance, ensuring proper levels and condition of the coolant.

How to Refill & Bleed

Properly refilling and bleeding the cooling system after a flush or repair is critical to prevent air pockets, which can lead to overheating. Here's a general procedure for your 2016 Silverado 2500HD:

1. Drain the System: With the engine cool, place a drain pan under the radiator. Open the radiator drain cock and remove the radiator cap to allow the system to drain completely. If flushing, follow the instructions of your chosen flush product.
2. Close Drain & Refill: Close the radiator drain cock. Begin refilling the system slowly with the specified DEX-COOL® coolant mixture through the radiator fill neck or the surge tank (for vehicles so equipped).
3. Start Engine & Bleed: Start the engine and let it run with the heater on full blast (this opens the heater core valve, allowing coolant to circulate through it). Keep an eye on the coolant level in the surge tank and top it off as needed. Air bubbles will naturally rise and escape through the surge tank. For the Duramax diesel, ensure the specific bleed screws (if present, consult your service manual) are opened to assist in air removal.
4. Burp the System: Squeeze the upper and lower radiator hoses several times to help dislodge any trapped air bubbles.
5. Monitor Temperature: Continue to run the engine until it reaches operating temperature and the thermostat opens (you'll feel the upper radiator hose get hot). The cooling fan should cycle on.

After refilling, drive the vehicle and then allow it to cool completely. Recheck the coolant level in the surge tank and top off if necessary. Repeat this process over the next few drive cycles to ensure all air has been expelled.

Common Cooling System Issues

Owners of 2016 Chevrolet Silverado 2500HD trucks may occasionally encounter certain cooling system issues, similar to other vehicles of this generation:

• Water Pump Leaks: A common wear item, water pump failures can lead to coolant leaks and overheating. Look for coolant puddles under the front of the vehicle or a noticeable drop in coolant level.
• Thermostat Failure: A stuck-open thermostat can cause the engine to run cold, while a stuck-closed thermostat can lead to rapid overheating. Check for unusual temperature gauge readings.
• Radiator Leaks: Radiators can develop leaks over time due to corrosion or damage from road debris. Inspect the radiator fins and tanks for any signs of leaks or damage.
• Hose Leaks: Hoses can degrade and crack, leading to leaks. Periodically inspect all cooling system hoses for cracks, bulges, or softness.
• Degraded Coolant: Over time, coolant can break down and lose its protective properties, leading to corrosion and sludge buildup. This underscores the importance of adhering to flush intervals.

Addressing these issues promptly can prevent more severe engine damage.

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