2004 CHEVROLET SSR ECU

{CAUTION:
If the air bag readiness light ever comes on
when you have turned off the passenger’s
frontal air bag, it means that something may
be wrong with the air bag system. The
passenger’s frontal air bag could inate even
though the switch is off. If this ever happens,
do not let anyone whom the national
government has identied as a member of a
passenger air bag risk group sit in the
passenger’s position (for example, do not
secure a rear-facing child restraint in your
vehicle) until you have your vehicle serviced.
SeeAir Bag Off Switch on page 1-51.
Charging System Light
The charging system light
will come on briey when
you turn on the ignition,
but the engine is not
running, as a check to
show you it is working.
It should go out once the engine is running. If it stays
on, or comes on while you are driving, you may have a
problem with the charging system. It could indicate
that you have problems with a generator drive belt, or
another electrical problem. Have it checked right
away. Driving while this light is on could drain your
battery.
If you must drive a short distance with the light on, be
certain to turn off all your accessories, such as the radio
and air conditioner.
3-29

Change Engine Oil Light
This light is displayed
when the engine oil needs
to be changed.
Once the engine oil has been changed, the light must
be reset. Until it is reset, the light will be displayed when
the engine is on. For more information on resetting
the system, see “When to Change Engine Oil (GM Oil
Life System)” underEngine Oil on page 5-13. See
alsoScheduled Maintenance on page 6-4.
Security Light
This light will come on
briey when you turn the
key to START. The
light will stay on until the
engine starts.
If the light ashes, the Passlock
®system has entered a
tamper mode. If the vehicle fails to start, seePasslock®
on page 2-13.
If the light comes on continuously while driving and
stays on, there may be a problem with the Passlock
®
system. Your vehicle will not be protected by Passlock®,
and you should see your dealer.
Also, seeContent Theft-Deterrent on page 2-11for
additional information regarding the security light.
3-37

Include an ice scraper, a small brush or broom, a
supply of windshield washer uid, a rag, some winter
outer clothing, a small shovel, a ashlight, a red
cloth and a couple of reective warning triangles. And, if
you will be driving under severe conditions, include a
small bag of sand, a piece of old carpet or a couple of
burlap bags to help provide traction. Be sure you
properly secure these items in your vehicle.Driving on Snow or Ice
Most of the time, those places where your tires meet
the road probably have good traction.
However, if there is snow or ice between your tires and
the road, you can have a very slippery situation. You
will have a lot less traction or “grip” and will need to be
very careful.
4-27

Certication/Tire Label
The Certication/Tire label is found on the driver’s door
edge, below the door latch. The label shows the size
of your original tires and the ination pressures needed
to obtain the gross weight capacity of your vehicle.
This is called the Gross Vehicle Weight Rating (GVWR).
The GVWR includes the weight of the vehicle, all
occupants, fuel, cargo and trailer tongue weight, if
pulling a trailer.The Certication/Tire label also tells you the maximum
weights for the front and rear axles, called Gross
Axle Weight Rating (GAWR). To nd out the actual loads
on your rear axle, you need to go to a weigh station
and weigh your vehicle. Your dealer can help you with
this. Be sure to spread out your load equally on both
sides of the centerline.
Never exceed the GVWR for your vehicle, or the GAWR
for the rear axle.
And, if you do have a heavy load, you should spread it
out and load toward the front of the pickup box.
Similar appearing vehicles may have different GVWRs
and payloads. Please note the Certication/Tire
label on your truck or consult your dealer for additional
details.{CAUTION:
In the case of a sudden stop or collision,
things carried in the bed of your truck could
shift forward and come into the passenger
area, injuring you and others. If you put things
in the bed of your truck, you should make sure
they are properly secured.
U.S. Shown, Canada Similar
4-36

{CAUTION:
Do not load your vehicle any heavier than the
GVWR, or either the maximum front or rear
GAWR. If you do, parts on your vehicle can
break, and it can change the way your vehicle
handles. These could cause you to lose
control and crash. Also, overloading can
shorten the life of your vehicle.
Using heavier suspension components to get added
durability might not change your weight ratings. Ask your
dealer to help you load your vehicle the right way.
Notice:Overloading your vehicle may cause
damage. Repairs would not be covered by your
warranty. Do not overload your vehicle.
If you put things inside your vehicle — like suitcases,
tools, packages, or anything else — they will go as fast
as the vehicle goes. If you have to stop or turn
quickly, or if there is a crash, they’ll keep going.
{CAUTION:
Things you put inside your vehicle can strike
and injure people in a sudden stop or turn, or
in a crash.
Put things in the rear area of your vehicle.
Try to spread the weight evenly.
Never stack heavier things, like suitcases,
above the tops of the seats inside the
vehicle or in the cargo area when the
convertible top is lowered.
If you carry tall objects in the cargo area,
secure them properly and have the
convertible top fastened in the raised
position.
Do not leave an unsecured child restraint
in your vehicle.
When you carry something inside the
vehicle, secure it whenever you can.
4-37

Then pretension the ball rod by pulling out the
handwheel and turning it counterclockwise. When
the ball is pretensioned, it means:
The red area of the handwheel should be
opposite the white marking on the ball rod.
The key cannot be withdrawn.
The ball rod can only be installed in this position.
If the key is inserted and the lock is open,
tighten the handwheel slightly and turn clockwise
as far as the stop. Insert the ball rod as far
into the housing as it will go. When this happens,
you will hear the lock engage.3. Check that the ball rod is tight by doing the
following:
Close the lock, withdraw the key, and install the
lock cover securely.
The green area on the handwheel should be
opposite the white dot on the ball rod.
Move the hitch back and forth to ensure it is
properly secured.
If you cannot complete all of the above checks, repeat
the assembly procedure.
4-45

Trailer Brakes
If your trailer weighs more than 1,000 lbs. (450 kg)
loaded, then it needs its own brakes—and they must be
adequate. Be sure to read and follow the instructions
for the trailer brakes so you’ll be able to install,
adjust and maintain them properly.
Your trailer’s brake system can tap into the vehicle’s
hydraulic brake system only if:
The trailer parts can withstand 3,000 psi
(20 650 kPa) of pressure.
The trailer’s brake system will use less than
0.02 cubic inch (0.3 cc) of uid from your vehicle’s
master cylinder. Otherwise, both braking systems
won’t work well. You could even lose your brakes.
If everything checks out this far, then make the brake
uid tap at the port on the master cylinder that
sends uid to the rear brakes. But don’t use copper
tubing for this. If you do, it will bend and nally break off.
Use steel brake tubing.
Driving with a Trailer
Towing a trailer requires a certain amount of experience.
Before setting out for the open road, you’ll want to get
to know your rig. Acquaint yourself with the feel of
handling and braking with the added weight of the trailer.
And always keep in mind that the vehicle you are
driving is now a good deal longer and not nearly as
responsive as your vehicle is by itself.
Before you start, check all trailer hitch, parts and
attachments, safety chains, electrical connector, lamps,
tires and mirror adjustment. If the trailer has electric
brakes, start your vehicle and trailer moving and then
apply the trailer brake controller by hand to be sure
the brakes are working. This lets you check your
electrical connection at the same time.
During your trip, check occasionally to be sure that the
load is secure, and that the lamps and any trailer
brakes are still working.
Following Distance
Stay at least twice as far behind the vehicle ahead as
you would when driving your vehicle without a trailer.
This can help you avoid situations that require
heavy braking and sudden turns.
4-48

When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal down
while you:
Start your engine.
Shift into a gear.
Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the
chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re
pulling a trailer. SeeScheduled Maintenance on
page 6-4for more information. Things that are especially
important in trailer operation are automatic transmission
uid (don’t overll), engine oil, axle lubricant, belt,
cooling system and brake system. Each of these is
covered in this manual. If you’re trailering, it’s a
good idea to review these sections before you start
your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Trailer Wiring Harness
The trailer wiring is a four-wire harness assembly. The
wires are blunted and taped to the wiring harness.
The harness and wiring are stored under the vehicle on
the driver’s side. The harness has no connector and
should be wired by a qualied electrical technician. The
technician can use the following color code chart
when connecting the wiring harness to your trailer.
Black: Ground wire.
Yellow: Left turn lamps.
Dark Green: Right turn lamps.
Brown: Parking lamps.
Securely attach the harness to the trailer, then tape or
strap it to your vehicle’s frame rail. Be sure you
leave it loose enough so the wiring doesn’t bend or
break, but not so loose that it drags on the ground. Store
the harness in its original place. Wrap the harness
together and tie it neatly so it won’t be damaged.
4-51