6-55 Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced
carefully at the factory to give you the longest tire life
and best overall performance.
Scheduled wheel alignment and wheel balancing are
not needed. However, if you notice unusual tire wear or
your vehicle pulling one way or the other, the alignment
may need to be reset. If you notice your vehicle
vibrating when driving on a smooth road, your wheels
may need to be rebalanced.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly
rusted or corroded. If wheel nuts keep coming loose,
the wheel, wheel bolts and wheel nuts should be
replaced. If the wheel leaks air, replace it (except some
aluminum wheels, which can sometimes be repaired).
See your dealer if any of these conditions exist.
Your dealer will know the kind of wheel you need.
Each new wheel should have the same load
-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
CAUTION:
Using the wrong replacement wheels, wheel bolts
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use
the correct wheel, wheel bolts and wheel nuts
for replacement.
NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire or tire
chain clearance to the body and chassis.
See ªChanging a Flat Tireº in the Index for
more information.
6-66
Electrical System
Add-On Electrical Equipment
NOTICE:
Don't add anything electrical to your vehicle
unless you check with your dealer first. Some
electrical equipment can damage your vehicle
and the damage wouldn't be covered by your
warranty. Some add
-on electrical equipment
can keep other components from working as
they should.
Your vehicle has an air bag system. Before attempting to
add anything electrical to your vehicle, see ªServicing
Your Air Bag
-Equipped Vehicleº in the Index.
Headlamp Wiring
The headlamp wiring has an individual fuse. An
electrical overload will cause the lamps to go on and off,
or in some cases to remain off. If this happens, have the
headlamp wiring checked right away.
Windshield Wiper Fuses
A circuit breaker protects the wiper motor. If the wiper
motor overheats due to heavy snow, the wipers will stop
until the motor cools and will then restart.
A MiniFuse
powers the wiper motor. If the MiniFuse
blows, there is an electrical problem. Be sure to have
it fixed.
Power Windows and Other Power Options
Circuit breakers protect the power windows. When the
current load is too heavy, the circuit breaker opens and
closes, protecting the circuit until the problem is fixed or
goes away.
6-68
Minifuses Usage
1 ALDL
2 Accessory
3 Windshield Wipers
4 Not Used
5 Headlamp Low Beam Left
6 Headlamp Low Beam RightMinifuses Usage
7 Instrument Panel
8 Powertrain Control
Module Battery
9 Headlamp High Beam Right
10 Headlamp High Beam Left
11 Ignition 1
12 Fog Lamps
13 Transmission
14 Cruise Control
15 Coil MDL
16 Injector Bank #2
17 Not Used
18 Not Used
19 Powertrain Control
Module Ignition
20 Oxygen Sensor
21 Injector Bank #1
6-69
Minifuses Usage
22 Auxiliary Power, (Cltr2)
23 Cigar Lighter
24 Daytime Running Lamps
25 Horn
26 Air Conditioner Clutch
Micro Relays Usage
27 Headlamp High Beam
28 Headlamp Low Beam
29 Fog Lamps
30 Daytime Running Lamps
31 Horn
32 Air Conditioner Clutch
Mini Relays Usage
33 Not Used
34 Accessory
35 Not UsedMini Relays Usage
36 Starter 1
37 Cooling Fan Secondary
38 Ignition 1
39 Cooling Fan Series/Parallel
40 Cooling Fan Primary
Maxibreaker Usage
41 Starter
42 Export Use
MaxiFuses Usage
43 Not Used
44 Antilock Brake System
45 Air Pump
46 Cooling Fan Secondary
47 Cooling Fan Primary
The spare fuses are located in numbers 48 through 52.
The fuse puller is located in number 53.
6-75
Replacement Bulbs
Application Number
Headlamps Composite
Inner High Beam 9005 HB3. . . . . . . . . . . . . . . . . . .
Outer Low Beam 9006 HB4. . . . . . . . . . . . . . . . . . .
Front Turn Signal 2357NA. . . . . . . . . . . . . . . . . . . . . .
Stop/Taillamp 3057. . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Turn Signal 3057. . . . . . . . . . . . . . . . . . . . . . . .
Capacities and Specifications
The following approximate capacities are given in
English and metric conversions. Please refer to
ªRecommended Fluids and Lubricantsº in the
Maintenance Schedule booklet for more information.
Engine Specifications
Displacement 279 cubic inches (4 565 cc). . . . . . . . .
Type 4.6 L DOHC V8. . . . . . . . . . . . . . . . . . . . . . . . .
VIN Engine Code
SLS Y. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STS 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horsepower
SLS 275 (bhp) @ 5600 rpm. . . . . . . . . . . . . . . . . . .
205 (kW) @ 5600 rpm
STS 300 (bhp) @ 6000 rpm. . . . . . . . . . . . . . . . . . .
224 (kW) @ 6000 rpm
Torque
SLS 300 (lb
-ft) @ 4000 rpm . . . . . . . . . . . . . . . . . .
407 (N´m) @ 4000 rpm
STS 295 (lb
-ft) @ 4400 rpm . . . . . . . . . . . . . . . . . .
400 (N´m) @ 4400 rpm
Firing Order 1
-2-7-3-4-5-6-8 . . . . . . . . . . . . . . . . . . .
Thermostat Starts To Open 177
-184F (81-85C) . .
