🧪Fluid Capacities
Cadillac STS Fluid Capacities
All fluid capacities for your Cadillac STS: engine oil, coolant, transmission fluid, brake fluid, power steering, and more.
Quick Answer
The Cadillac STS requires multiple fluids maintained at specific levels. Engine oil, coolant, transmission fluid, brake fluid, and power steering fluid all have different capacities depending on your engine and model year.
2006-2011
2006-2011Engine OilVaries by engine — check owner's manual (typically 4-8+ quarts)
Coolant (total system)6.0 - 10.0 quarts
Transmission Fluid3.5 - 4.0 quarts (drain & fill) / 7-9 quarts (total)
Brake FluidDOT 3 or DOT 4 — ~1 quart for full flush
Power Steering FluidATF or manufacturer-specific — ~1 quart
Windshield Washer~1 gallon
Notes
- →Never mix different types of coolant — flush completely when changing brands
- →Transmission fluid should be checked with the engine running and at operating temperature
- →Brake fluid absorbs moisture over time — replace every 2-3 years regardless of mileage
2005-2005
2005-2005Engine OilVaries by engine — check owner's manual (typically 4-8+ quarts)
Coolant (total system)6.0 - 10.0 quarts
Transmission Fluid3.0 - 4.0 quarts (drain & fill)
Brake FluidDOT 3 or DOT 4 — ~1 quart for full flush
Power Steering FluidATF or manufacturer-specific — ~1 quart
Windshield Washer~1 gallon
Notes
- →Never mix different types of coolant — flush completely when changing brands
- →Transmission fluid should be checked with the engine running and at operating temperature
- →Brake fluid absorbs moisture over time — replace every 2-3 years regardless of mileage
Frequently Asked Questions
- How much coolant does a Cadillac STS hold?
- The Cadillac STS cooling system holds 6-10 quarts total depending on the engine. A drain-and-fill replaces about 50-60% of the coolant. For a complete flush, you'll need the full capacity amount.
- What type of transmission fluid does a Cadillac STS use?
- The Cadillac STS transmission fluid type depends on whether it's an automatic or manual transmission and the model year. Always use the manufacturer-specified fluid — check your owner's manual for the exact ATF or manual transmission fluid required.
- Does a Cadillac STS have power steering fluid?
- 2015+ Cadillac STS models with electric power steering don't use power steering fluid. Older models with hydraulic power steering use ATF or manufacturer-specific fluid — check your owner's manual.
- What brake fluid does a Cadillac STS use?
- Most Cadillac STS models use DOT 3 or DOT 4 brake fluid. DOT 4 has a higher boiling point and is preferred for performance driving. Never use DOT 5 (silicone-based) in a system designed for DOT 3/4.
Cadillac STS Repair Guides
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