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Cadillac STS

Maintenance specs for 3 variants of the Cadillac STS — from 2005 to 2011.

20052011 Cadillac STS

3.6L V6 (LY7) · RWD

255 hp / 252 lb-ft

Engine Oil

Weight5W-30
Capacity6 qt
FilterPF48

Transmission

Type6-Speed Automatic (6L50)
FluidDexron VI
Drain & fill5.5 qt
Full capacity10 qt

Coolant

TypeDex-Cool (orange)
Capacity11.5 qt
Shop coolant

Brake Fluid

TypeDOT 3
Shop DOT 3

Power Steering

TypeHydraulic
FluidGM Power Steering Fluid

Differentials

Rear fluid75W-90 Synthetic GL-5

Fuel

Tank17.5 gal
TypePremium 91

Tires

Size235/50R18
Pressure (front)30 PSI
Pressure (rear)30 PSI
Shop 235/50R18 tires

Battery

Group size48
CCA690 A
Shop group 48 battery

Spark Plugs

Gap0.043 in
Shop spark plugs

Wiper Blades

Driver22"
Passenger19"
Shop wiper blades

Service Intervals

Oil change5,000 mi
Trans service50,000 mi
Coolant flush150,000 mi
Spark plugs100,000 mi
Timingchain (no scheduled replacement)
Air filter30,000 mi
Cabin filter22,500 mi
Drive belt60,000 mi

20052011 Cadillac STS

3.6L V6 (LY7) · AWD

255 hp / 252 lb-ft

Engine Oil

Weight5W-30
Capacity6 qt
FilterPF48

Transmission

Type6-Speed Automatic (6L50)
FluidDexron VI
Drain & fill5.5 qt
Full capacity10 qt

Coolant

TypeDex-Cool (orange)
Capacity11.5 qt
Shop coolant

Brake Fluid

TypeDOT 3
Shop DOT 3

Power Steering

TypeHydraulic
FluidGM Power Steering Fluid

Differentials

Front fluid75W-90 Synthetic GL-5
Rear fluid75W-90 Synthetic GL-5

Fuel

Tank17.5 gal
TypePremium 91

Tires

Size235/50R18
Pressure (front)30 PSI
Pressure (rear)30 PSI
Shop 235/50R18 tires

Battery

Group size48
CCA690 A
Shop group 48 battery

Spark Plugs

Gap0.043 in
Shop spark plugs

Wiper Blades

Driver22"
Passenger19"
Shop wiper blades

Service Intervals

Oil change5,000 mi
Trans service50,000 mi
Coolant flush150,000 mi
Spark plugs100,000 mi
Timingchain (no scheduled replacement)
Air filter30,000 mi
Cabin filter22,500 mi
Drive belt60,000 mi

20052011 Cadillac STS

4.6L V8 Northstar (LH2) · RWD

320 hp / 315 lb-ft

Engine Oil

Weight5W-30
Capacity7.5 qt
FilterPF46

Transmission

Type6-Speed Automatic (6L50)
FluidDexron VI
Drain & fill5.5 qt
Full capacity10 qt

Coolant

TypeDex-Cool (orange)
Capacity13 qt
Shop coolant

Brake Fluid

TypeDOT 3
Shop DOT 3

Power Steering

TypeHydraulic
FluidGM Power Steering Fluid

Differentials

Rear fluid75W-90 Synthetic GL-5

Fuel

Tank17.5 gal
TypePremium 91

Tires

Size235/50R18
Pressure (front)30 PSI
Pressure (rear)30 PSI
Shop 235/50R18 tires

Battery

Group size78
CCA770 A
Shop group 78 battery

Spark Plugs

Gap0.05 in
Shop spark plugs

Wiper Blades

Driver22"
Passenger19"
Shop wiper blades

Service Intervals

Oil change5,000 mi
Trans service50,000 mi
Coolant flush150,000 mi
Spark plugs100,000 mi
Timingchain (no scheduled replacement)
Air filter30,000 mi
Cabin filter22,500 mi
Drive belt60,000 mi