Where to put coolant in a 2010 Cadillac SRX?

The coolant is added to the engine’s expansion tank (the coolant reservoir) in the engine bay. Do not pour coolant directly into the radiator, and use the Dex-Cool long-life coolant in a 50/50 mix with distilled water unless you have pre-mixed coolant. This will keep the cooling system properly pressurized and prevent overheating.

In this article, you’ll find where the fill point is located on the 2010 SRX, what type of coolant to use, and step-by-step guidance for safely checking and refilling the system. The goal is to help you identify the correct reservoir, understand the proper mixture, and perform a safe refill without risking burns or damage to the cooling components.

Where to add coolant on the 2010 SRX

The primary fill point is the translucent expansion tank (coolant reservoir) in the engine bay. It has a cap on top and MIN/MAX level marks on the side. In most 2010 SRX models, the reservoir is located toward the front-right side of the engine bay near the radiator. Use the reservoir cap to add coolant rather than filling through the radiator cap (if your model uses a separate radiator cap, the reservoir is still the correct fill point for routine top-offs).

Before attempting any filling, make sure the engine is completely cold to avoid scalding and pressurized spray from the system.

1. Park the vehicle on level ground and let the engine cool completely (no heat in the engine or radiator).


2. Open the hood and locate the expansion tank. It’s a translucent reservoir with a labeled cap and MIN/MAX marks.


3. Gently turn the reservoir cap counterclockwise to remove it. If there is resistance, stop and wait longer for the engine to cool.


4. Inspect the coolant level against the MAX mark on the side of the tank when the cap is removed. Do not exceed the MAX line.


5. Pour a 50/50 mix of Dex-Cool (the long-life coolant used by GM) and distilled water into the reservoir until the level reaches the MAX line. If you’re using pre-mixed Dex-Cool, you can top off with the same pre-mixed solution to the MAX line.


6. Install the reservoir cap securely and wipe away any spilled coolant from the reservoir area.


7. Start the engine and allow it to reach normal operating temperature with the heater on (to help bleed air). Check for leaks and re-check the coolant level once the engine cools again; top off if necessary to the MAX line.

After completing these steps, the coolant level should be stable around the MAX mark when the engine is cold. If the level drops quickly, or if you notice frequent overheating or leaks, have the cooling system inspected by a professional.

Choosing the right coolant for your SRX

Using the correct coolant type and mixture is essential for the 2010 SRX’s Dex-Cool system. Here are the key points to know.

• Use Dex-Cool (orange) long-life coolant, which is GM-approved for this vehicle.


• Mix 50/50 with distilled water if you’re using concentrate Dex-Cool. If you buy pre-mixed Dex-Cool, you can top off with the same pre-mixed product.


• Do not mix Dex-Cool with other brands or types of coolant unless the manufacturer explicitly allows it; incompatible mixes can cause gelling or reduced cooling efficiency.


• Avoid using water-only fills or coolant that’s formulated for non-Dex-Cool systems, unless you’re converting per GM guidelines.

Note: Always check the owner’s manual or your service documentation for the exact coolant specification and any model-specific bleed procedures. If you’re unsure about the exact mix or have a complex leak, seek professional service.

Safety and maintenance tips

Working with a hot cooling system can cause severe burns, and using the wrong coolant can damage components. Follow these safety tips during any refill or inspection process.

• Never open the coolant reservoir cap when the engine is hot or under pressure.


• Handle coolant with care; store any spilled fluid in a sealed container and dispose of it at a proper facility.


• Keep the coolant cap clean and free of dirt to maintain proper sealing.


• Check hoses and the reservoir for signs of wear, cracks, or leaks during the refill process.

If you suspect a persistent overheating issue, a slow leak, or coolant loss between top-offs, schedule a diagnostic check. The cooling system is critical to engine reliability, and early attention can prevent more serious damage.

Summary

For a 2010 Cadillac SRX, the correct place to add coolant is the expansion tank in the engine bay, using Dex-Cool in a 50/50 mix with distilled water (or pre-mixed Dex-Cool). Open the reservoir cap only when cold, fill to the MAX line, reseal, and run the engine to bleed air before rechecking. Use the proper coolant type, avoid mixing incompatible formulations, and monitor for leaks or overheating. When in doubt, consult the owner’s manual or a qualified technician to ensure safe and accurate service.