Q: Is there anything I might add to the  front of the vehicle  that could 
keep the air bag  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  f'rom working properly. Also. the air bag system may not  work 
properly 
if you  relocate  any of the air bag sensors. If you have any 
question  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  Satistiaction  Procedure" in 
the Index.) 
Safety Belt Use During  Pregnancy 
Safety belts  work for everyone,  including pregnant women.  Like all 
occupants. they are more  likely  to  be seriously injured if they don't  wear 
safety belts. 
A pregnant  woman should wear a lap-shoulder  belt.  and  the  lap portion 
should  be  worn 
as low as possible throughout  the pregnancy. 
The  best way 
to protect  the fetus  is to protect the  mother.  When  a safety belt 
is worn properly,  it's more likely that the fetus  won't be  hurt 
in a  crash.  For 
pregnant  women, as  for  anyone, the key 
to making safety belts effective  is 
wearing them properly. 
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NOTICE: 
Driving  in  the  4-WHEEL  HIGH  (4H) or 4-WHEEL  LOW (4,) 
positions  for a  long  time  on  dry  or wet pavement  could  shorten 
the  life of your  vehicle’s  drivetrain. 
NOTICE: 
Changing  your  vehicle’s body  height  can  damage  your  vehicle’s 
suspension,  drivetrain,  or  other  vehicle components.  It 
may also 
affect  the 
way your  vehicle  handles,  and  the  function  of your 
vehicle’s  safety  features. 
Do not  change  your  vehicle’s height 
from  the  original  design  specifications. 
Transfer Case 
The transfer case shift 
lever 
is on the  floor  to 
the  right  of  the  driver. 
Use 
this lever to shift 
into  and 
out of 
four-whcel  drive. 
An indicator near  the lever  shows  you  the  transfer case settings. 
4-WHEEL  LOW (4L) 
NEUTRAL (N) 
2-WHEEL HIGH (2H) 
4-WHEEL HIGH (4H) 
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Brake  Wear 
Your vehicle has  front disc brakes and rear  drum brakes.  If you have a C 
3500 HD model, it has four-wheel  disc brakes. 
Disc brake pads have  built-in wear indicators that make 
a high-pitched 
warning  sound when the brake pads are  worn  and  new pads are needed.  The 
sound  may come  and 
go or be heard  all the time your vehicle  is moving 
(except  when  you  are pushing  on  the brake pedal  firmly). 
I A CAUTION: 
The  brake  wear  warning  sound  means  that  sooner  or  later  your 
brakes  won’t  work  well.  That  could  lead  to  an  accident.  Whe\
n 
you hear  the  brake  wear  warning  sound,  have  your  vehicle 
serviced. 
NOTICE: 
Continuing  to  drive  with  worn-out  brake  pads  could  result in 
costly  brake  repair. 
Some  driving  conditions or  climates  may cause  a brake  squeal  when  the 
brakes  are first applied  or lightly applied.  This  does not  mean something  is 
wrong  with your brakes. 
If you have rear drum brakes,  they don’t  have  wear  indicators,  but if you 
ever  hear 
a rear brake rubbing  noise, have  the rear brake linings inspected. 
Also, the rear brake  drum should  be removed and inspected each time the 
tires  are removed for rotation 
or changing.  When  you  have  the  front brakes 
replaced, have the rear brakes inspected, too. 
Brake linings should always  be replaced as complete  axle  sets. 
Brake  Pedal  Travel 
See your  dealer if the brake  pedal does not return to normal height,  or if 
there is a rapid  increase in pedal  travel.  This  could  be a sign of brake 
trouble. 
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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. 
In most cases, you will not need to have your wheels aligned  again. 
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 
GM 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. 
A 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/odometer calibration, headlamp 
aim,  bumper  height,  vehicle  ground clearance,  and  tire or  tire 
chain clearance to  the body  and chassis. 
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