Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 Chevrolet SuburbanCoolant Type & Capacity
OEM spec from the factory service manual for the FL, 4WD, Gas variant.
Quick Answer
Coolant Type
50/50 mixture of DEX-COOL and clean, drinkable water
Capacity
17.80 QTS.
16.84 L
Variant
FL, 4WD, Gas
Note: All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling.
This vehicle's factory manual
2018 Chevrolet Suburban: confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
What You'll Need
Related for Your 2018 Chevrolet Suburban
Frequently Asked Questions
- What type of coolant does a 2018 Chevrolet Suburban take?
- The 2018 Chevrolet Suburban requires 50/50 mixture of DEX-COOL and clean, drinkable water. The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the FL, 4WD, Gas configuration.
- How much coolant does a 2018 Chevrolet Suburban hold?
- The 2018 Chevrolet Suburban cooling system capacity is 17.80 QTS. (16.84 L).
- Can I use universal coolant in my 2018 Chevrolet Suburban?
- It is strongly recommended to use coolant that meets the 50/50 mixture of DEX-COOL and clean, drinkable water specification. Universal coolants may not provide the correct corrosion protection for your engine's materials.
- What happens if I use the wrong coolant in my 2018 Chevrolet Suburban?
- Using coolant that does not meet the OEM specification can cause corrosion, gasket damage, and overheating. Always verify the correct coolant type before topping off or flushing the system.