GMC SIERRA 1998 Service Manual

0 Your vehicle is equipped with a crash sensing and
diagnostic module, whch records information about
the air
bag system. The module records information
about the readiness
of the system, when the sensors are
activated
and driver’s safety belt usage at deployment.
switch
on the instrument. panel that you can use to
turn
off the passenger’s air bag. But use this switch
only when you want to secure a rear-facing child
restraint at the right front passenger’s position. See
“Securing a Child Restraint
in the Right Front Seat
Position”
in the Index for more on this, including
important safety information.
0 Unless you have a Crew Cab, your vehicle has a
A CAUT-ON:
If the right front passenger’s air bag is turned
off, the person sitting there won’t have the extra
protection
of an air bag. In a crash, the air bag
wouldn’t be able to inflate and help protect the
person sitting there. Make sure the
air bag is
turned on unless
you are using a rear-facing child
restraint in the right front seat position.
0 Let only qualified technicians work on your air bag
system. Improper service can mean that your air bag
system won’t work properly. See your dealer
for service.
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I NOTICE:
If you damage the covering for the driver’s or the
right front passenger’s air bag, the bag may not
work properly. You may have to replace the air
bag module in the steering wheel or both the air
bag module and the instrument panel for the right front passenger’s air bag.
Do not open or
break the air bag coverings.
Servicing Your Air Bag-Equipped Vehicle
Air bags affect how your vehicle should be serviced.
There are parts
of the air bag system in several places
around your vehicle. You don’t want the system to
inflate while someone is working on your vehicle. Your
dealer and the service manual have information about
servicing your vehicle and the air
bag system. To
purchase a service manual, see “Service and Owner
Publications”
in the Index.
If your vehicle ever gets into a lot of water -- such as
water up to the carpeting or higher -- or if water enters
your vehicle
and soaks the carpet, the air bag controller
can be soaked and ruined. If this ever happens, and then
you start your vehicle, the damage could make the air
bags inflate, even if there’s no crash.
You would have to
replace the air bags
as well as the sensors and related
parts. If your vehicle is ever
in a flood? or if it‘s exposed
to water that soaks the carpet, you can avoid needless
repair costs
by turning off the vehicle immediately.
Don’t
let anyone start the vehicle, even to tow it, unless
the battery cables are first disconnected.
I
For up to 10 minutes after the ignition key is
turned off and the battery is disconnected, an air
bag can still inflate during improper service. You
can be injured if you are close to an air bag when
it inflates. Avoid
wires wrapped with yellow tape
or yellow connectors. They are probably part of
the
air bag system. Be sure to follow proper
service procedures, and make sure the person
performing work for you
is qualified to do so.
~~
The ail- bag system does not need regular maintenance.
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Adding Equipment to Your Air
Bag-Equipped Vehicle
e.” If I add a push bumper or a bicycle rack to the
front of my vehicle, will it keep the air
bags
from working properly?
A: As long as the push bumper or bicycle rack is
attached to your vehicle so that the vehicle’s basic
structure isn’t changed, it’s not likely to keep the
air bags from working properly in a crash.
Q.” Is there anything I might add to the front of the
vehicle that could keep the air bags from
working properly?
A: Yes. If you add things that change your vehicle’s
frame, bumper system, front end sheet metal or
height, they may keep the air bag system from
working properly. Also, the air bag system may
not
work properly if you relocate any of the air bag
sensors. If
you have any questions about this, you
should contact Customer Assistance before you
modify your vehicle. (The phone numbers and
addresses for Customer Assistance are
in Step Two
of the Customer Satisfaction Procedure in this
manual. See “Customer Satisfaction Procedure” in
the Index.)
What if I add a snow plow? Will it keep the air
bags from working properly?
A: We’ve designed our air bag systems to work
properly under a
wide range of conditions,
including snow plowing with vehicles equipped
with the
optional Snow Plow Prep Package (RPO
VYU). But don’t change or defeat the snow plow’s
“tripping mechanism.”
If you do, it can damage
your snow plow and your vehicle, and
it may cause
an air bag inflation.
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Center Passenger Position
Lap Belt
If your vehicle has front and rear bench seats, someone
can sit in the center positions. Rear (Extended and Crew Cab)
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Front (All) Rear (Extended and Crew Cab)
When you sit in a center seating position, you have a lap
safety belt, which has
no retractor. To make the belt
longer, tilt the latch plate
and pull it along the belt.
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r ront (All)
To make the belt shorter, pull its free end as shown until
the belt is snug.
Buckle, position and release
it the same way as the lap
part of a lap-shoulder belt. If the belt isn’t long enough,
see ”Safety Belt Extender” at the end
of this section.
Make sure the release button on the buckle
is positioned
so you would be able to unbuckle the safety belt quickly
if you ever had to.
Rear Seat Passengers
It’s very important for rear seat passengers to buckle up!
Accident statistics show that unbelted people
in the rear
seat are hurt more often in crashes than those who are
wearing safety belts.
Rear passengers who aren’t safety belted can be thrown
out of the vehicle
in a crash. And they can strike others
in the vehicle who are wearing safety belts.
Rear Seat Outside Passenger Positions
(Extended
Cab)
If you have a Crew Cab, see “Rear Seat Outside
Passenger Positions (Crew Cab)” later
in this section.
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Lap-Shoulder Belt (Extended Cab)
The positions next to the windows have lap-shoulder
belts. Here’s
how to wear one properly.
1. Pick up the latch plate and pull the belt across you.
2. Push the latch plate into the buckle until it clicks.
Don’t
let it get twisted. If
the belt stops before it reaches the buckle, tilt the
latch plate and keep pulling until you can buckle it.
Pull up on the latch plate to make sure it is secure.
If the belt is not long enough, see “Safety Belt
Extender” at the end of this section.
Make sure the release button on the buckle is
positioned
so you would be able to unbuckle the
safety belt quickly
if you ever had to.
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1. To make the lap part tight, pull down on the buckle
end of the belt as
you pull up on the shoulder part. The lap part
of the belt should
be worn low and snug on
the hips, just touching the thighs. In a crash, this applies
force to the strong pelvic bones. And you'd be less likely
to slide under the lap belt.
If you slid under it, the belt
would apply force at your abdomen.
This could cause
serious or even fatal injuries. The' shoulder belt should go
over the shoulder and across the chest. These parts
of the
body are best able to take belt restraining forces.
The safety belt locks
if there's a sudden stop or a crash.
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1 A CAUTION:
I
You can be seriously hurt if your shoulder belt is
too loose.
In a crash, you would move forward
too much, which could increase injury. The
shoulder belt should fit against your body.
To unlatch the belt, just push the button on the buckle.
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Rear Seat Outside Passenger Positions (Crew Cab)
If you have an Extended Cab, see “Rear Seat
Outside Passenger Positions (Extended Cab)” earlier
in this section.
Lap-Shoulder Belt (Crew Cab)
The positions next to the windows have lap-shoulder
belts. Here’s how to wear one properly.
1. Pick up the latch plate and pull the belt across you.
Don’t let
it get twisted.
2. Push the latch plate into the buckle until it clicks. pull
up on the latch plate to make sure it is secure. When
the lap belt is pulled out all the way, it will lock.
If it
does, let it go back all the way and
start again.
If the belt is not long enough, see “Safety Belt
Extender” at the end
of this section.
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