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.
1990 Cadillac DeVilleCoolant Type & Capacity
OEM spec from the factory service manual for the 2D Coupe, 440T4/ME9 variant.
Quick Answer
Coolant Type
50/50 mixture of Ethylene Glycol Base Coolant and water
Capacity
12.00 QTS.
11.35 L
Variant
2D Coupe, 440T4/ME9
Note: GM Specification 1825-M.
Source: Factory service manual — 1990 Cadillac DeVille 2D Coupe, 440T4/ME9. View full manual section →
What You'll Need
Frequently Asked Questions
- What type of coolant does a 1990 Cadillac DeVille take?
- The 1990 Cadillac DeVille requires 50/50 mixture of Ethylene Glycol Base Coolant and water. The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the 2D Coupe, 440T4/ME9 configuration.
- How much coolant does a 1990 Cadillac DeVille hold?
- The 1990 Cadillac DeVille cooling system capacity is 12.00 QTS. (11.35 L).
- Can I use universal coolant in my 1990 Cadillac DeVille?
- It is strongly recommended to use coolant that meets the 50/50 mixture of Ethylene Glycol Base Coolant and 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 1990 Cadillac DeVille?
- 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.