Cadillac STS - 2009

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Overview

Model:

Cadillac STS V-6, STS V-8 and STS-V luxury performance sedans

Body style / driveline:

STS V-6 and V-8: luxury 4-door performance sedan with rear-wheel drive or all-wheel drive

STS-V: luxury 4-door high-performance sedan with rear-wheel drive

Construction:

unitized welded steel body with direct-mounted front cradle and rubber-isolated, multi-link independent rear suspension assembly

Manufacturing location:

Lansing Grand River Assembly, Lansing, Mich.

Key competitors:

STS V-6, V-8: BMW 5 & 7-Series, Mercedes Benz E-Class, Lexus GS/LS 430, Audi A6, Jaguar S-Type

STS-V: BMW M5, Mercedes Benz AMG E55

Engines

 

3.6L V-6 VVT DI

4.6LNorthstar V-8 VVT

4.4L Northstar DOHC V-8 SC

Application:

std. STS V-6

opt STS

std. STS-V

Displacement (cu in / cc):

217 / 3564

279 / 4565

267 / 4371

Bore & stroke (in / mm):

3.70 x 3.37 / 94 x 85

3.66 x 3.30 / 93 x 84

3.58 x 3.30 / 91 x 84

Block material:

cast aluminum

cast aluminum

upper: sand-cast 319 T7 aluminum; lower: die-cast aluminum

Cylinder head material:

semi-permanent mold aluminum

semi-permanent mold aluminum

319 T7 semi-permanent mold cast aluminum alloy

Valvetrain:

dual-overhead camshafts, 4 valves per cylinder, continuously variable valve timing

dual-overhead camshafts, 4 valves per cylinder, continuously variable valve timing

roller follower DOHC, 4 valves per cylinder, variable valve timing

Ignition system:

coil-on-plug with extended-life dual platinum-tipped spark plugs

coil-on-plug with extended-life dual platinum-tipped spark plugs

coil-on-plug with extended-life dual platinum-tipped spark plugs

Fuel delivery:

direct injection

returnless sequential fuel injection

returnless, electronic sequential fuel injection; supercharged

Compression ratio:

11.3:1

10.5:1

9.0:1

Horsepower (hp / @ rpm):

302 / 225 @ 6300*

320 / 239 @ 6400

469 / 349 @ 6400*

Torque (lb-ft / Nm @ rpm):

272 / 369 @ 5200*

315 / 427 @ 4400

439 / 595 @ 3900 *

Recommended fuel:

regular unleaded

premium recommended but not required

premium required

Maximum engine speed:

6700

6750

6700

Emissions controls:

evaporative system, close-coupled catalytic converters, positive crankcase ventilation, inlet and exhaust cam phasers, electronic throttle control, feedback air-fuel-ratio control

evaporative system, close-coupled catalytic converters, positive crankcase ventilation, inlet and exhaust cam phasers, electronic throttle control, feedback air-fuel-ratio control

BIN8/EURO 4 compliant; close-coupled catalytic converters – EGR and AIR not required;

meets Federal, California, and LEV2 evaporative emissions standards

EPA estimated fuel economy (city / hwy):

17 / 26 (RWD)

17 / 26 (AWD)

15 / 24 (RWD)

14 / 21 (AWD)

13 / 19

Transmissions

 

Hydra-Matic 6L50 (V-6 and 4.6L V-8)

Hydra-Matic 6L80 (V-8 SC)

Type:

6-speed electronically controlled automatic with lockup torque converter, clutch to clutch architecture, integral electro/hydraulic control module, Driver Shift Control, and performance algorithm liftfoot

6-speed, rear-wheel drive, electronically controlled, automatic overdrive with torque converter clutch; clutch-to-clutch architecture with integral electro/hydraulic control module, Driver Shift control

Gear ratios (:1):

 

 

First:

4.06

4.03

Second:

2.37

2.36

Third:

1.55

1.53

Fourth:

1.15

1.15

Fifth:

0.85

0.85

Sixth:

0.67

0.67

Reverse:

3.20

3.06

Final drive ratio:

RWD: 3.42

AWD: 3.23

3.23

Chassis/Suspension

 

Standard/Luxury Package

Performance Handling Package

STS-V

Availability:

std on V-6

std on V-8, opt on V-6

std on STS-V

Front:

independent, short/long arm, coil-over shock, anti-roll bar

independent, short/long arm, coil-over shock, anti-roll bar

Independent short/long arm, coil-over performance tuned monotube shocks, anti-roll bar

Rear:

independent, modified multi-link, coil springs, automatic load leveling shock absorbers, anti-roll bar

independent, modified multi-link, coil springs, magnetic ride control, pneumatic load leveling, anti-roll bar

independent, modified multi-link, coil springs, Nivomat performance-tuned load-leveling shocks, anti-roll bar

Traction control system:

full-range

full-range

full-range

Stabilizer bar:

Front:

hollow, 33-mm diameter

hollow, 33-mm diameter

hollow, 36-mm diameter

Rear:

RWD: hollow, 17-mm diameter

AWD: hollow, 24-mm diameter

RWD: hollow, 19-mm diameter

AWD: hollow, 24-mm diameter

hollow: 24-mm diameter

Steering type:

power-assisted rack and pinion; ZF Servotronic II variable assist system available

power-assisted rack and pinion; ZF Servotronic II variable assist system available

power-assisted rack and pinion; ZF Servotronic II variable assist system

Steering ratio:

18.2:1, variable ratio

18.2:1, variable ratio

17.2:1, variable ratio

Steering wheel turns, lock-to-lock:

3

3

2.85

Turning circle, curb-to-curb (ft / m):

V-6 w/17-inch tires: 36.9 / 11.5

V-6 w/18-inch tires: 38.8 / 11.82

V-8 w/17-inch tires: 37.7 / 11.5

V-8 w/18-inch tires: 38.8 / 11.82

38.8 / 11.82

Brakes

 

Luxury / Performance Package

Performance Handling Package

STS-V

Availability:

std on V-6

std on V-8, opt. on V-6

std on STS-V

Type:

power-assist – vacuum with anti-lock control, traction control and StabiliTrak

Brembo 4-wheel ABS, 4-piston front and rear calipers and performance brake linings, std. StabiliTrak with opt. active front steering (V-8 RWD only)

Brembo high-performance 4-wheel, 4-piston calipers; power-assist – vacuum with anti-lock control, traction control, StabiliTrak

Rotor diameter x thickness

(in / mm):

front: 11.9 x 1.3 / 303 x 32 vented disc

rear: 11.7 x 1.0 / 298 x 26 vented disc

front: 13.97 x 1.25 / 355 x 32 vented disc

rear: 14.37 x 1.10 / 365 x 28 vented disc

front: 13.97 x 1.25 /355 x 32 vented disc

rear: 14.37 x 1.1 / 365 x 28 vented disc

Wheels/Tires

 

Luxury / Performance Package

Performance Handling Package

STS-V

Availability:

std on V-6

std on V-8, opt on V-6

std on STS-V

Wheel size and type:

17 x 7-inch cast aluminum (std) or 18 x 8-inch 14-spoke polished aluminum alloy

17 x 7.5 / 8-inch (split size) aluminum or 18 x 8.5-inch chrome-plated aluminum alloy

front: 18 x 8.5-inch aluminum alloy six-lug

rear: 19 x 9.5-inch aluminum alloy six-lug

Tires:

Michelin V-rated, 235/50R17 & 255/45R17 or Michelin ALS 235/50R17

Michelin V-rated, 235/50R17 & 255/45R17 or Michelin W-rated, 235/50R18 & 255/45R18 or Michelin Pilot Sport, 255/45R18 summer only

front: P255/45R18 Extended Mobility – Pirelli

rear: P275/40R19 Extended Mobility – Pirelli

 Dimensions

Exterior

 

Wheelbase (in / mm):

116.4 / 2956

Overall length (in / mm):

STS V-6 and V-8: 196.3 / 4986

STS-V: 197.6 / 5018.7

Overall width (in / mm):

72.6 / 1844

Overall height (in / mm):

STS V-6 and V-8: 57.6 / 1463

STS-V: 58.2 / 1477.4

Track (in / mm):

STS V-6 and V-8 front: 61.8 / 1569

STS V-6 and V-8 rear: 62.3 / 1581

STS-V front: 66.0 / 1677.4

STS-V rear: 61.9 / 1571.5

Curb weight (lb / kg):

3.6L automatic: 3857 / 1750

3.6L automatic w/ AWD: 3660 / 1795

4.6L automatic: 3921 / 1779

4.6L automatic w/ AWD: 4230 / 1919

4.4L automatic: 4294 / 1948

Weight distribution

(% front / rear):

V-6: 52 / 48

V-8: 54 / 46

Interior

 

Headroom (in / mm):

front: 38.7 / 983

rear: 37.9 / 962

Legroom (in / mm):

front: 42.6 / 1082

rear: 38.3 / 972

Shoulder room (in / mm):

front: 58.6 / 1488

rear: 57.4 / 1458

Hip room (in / mm):

front: 54.6 / 1387

rear: 55.6 / 1412

 Capacities

EPA total volume (cu ft):

116.7

EPA trunk volume (cu ft):

13.8

Trailer towing maximum (lb / kg):

1000 / 454

Fuel tank (gal / L):

17.5 / 66.2

Engine oil (qt / L):

3.6L: 6 / 5.6

4.4L: 8 / 7.5

4.6L: 8 / 7.5

Cooling system (qt / L):

10.9 / 10.3

Seating capacity (front / rear):

2 / 3

*SAE certified

Note: Information shown is current at time of publication.

2009 Cadillac STS

2009 Cadillac STS

2009 Cadillac STS

2009 Cadillac STS

2009 Cadillac STS

2009 Cadillac STS

2009 Cadillac STS

2009 Cadillac STS

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