Page 62 of 378

When  Should  an Air Bag Inflate? 
An  air  bag is  designed  to  inflate in a moderate  to severe 
frontal,  or  near-frontal crash. The air bag  will inflate 
only 
if the  impact  speed is above the  system’s designed 
“threshold  level.” 
If your  vehicle goes straight into  a 
wall  that  doesn’t  move  or  deform, the threshold level is 
about 
12 to 18 mph (19 to 29 km/h). The threshold 
level  can  vary,  however,  with  specific vehicle design, 
so that it can be somewhat  above or below  this  range. 
If your  vehicle  strikes  something that will move  or 
deform,  such  as  a  parked  car,  the threshold level will 
be  higher.  The  air bag is not designed  to inflate 
in 
rollovers,  rear  impacts,  or  in many  side impacts because 
inflation  would  not  help  the occupant. 
in  any  particular  crash,  no one can say  whether  an air 
bag  should  have  inflated simply  because  of the  damage 
to  a  vehicle  or  because  of what  the repair  costs were. 
Inflation  is determined  by the angle  of the  impact 
and  how  quickly  the vehicle  slows down in frontal  or 
near-frontal  impacts. 
What  Makes  an Air Bag  Inflate? 
In an  impact  of sufficient  severity,  the air bag sensing 
system detects that the vehicle  is in 
a crash. The 
sensing system triggers  a release 
of gas from  the 
inflator, which  inflates the  air bag. The  inflator,  air bag, 
and related hardware are all part  of the  air bag 
modules inside the steering wheel  and 
in the  instrument 
panel in front  of the  right  front passenger. 
How Does  an Air Bag  Restrain? 
In moderate  to severe frontal or  near-frontal collisions, 
even belted occupants can contact the  steering wheel or 
the  instrument  panel.  Air bags supplement the 
protection provided  by safety  belts.  Air  bags distribute 
the  force  of the impact more  evenly over the occupant’s 
upper body, stopping the  occupant more gradually. 
But air bags would  not help  you in many types  of 
collisions, including  rollovers,  rear impacts and many 
side impacts, primarily because an occupant’s motion  is 
not toward those air  bags.  Air bags should  never  be 
regarded as anything more than  a supplement to  safety 
belts,  and then  only 
in moderate  to severe frontal  or 
near-frontal collisions. 
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        Page 231 of 378

California  Fuel Additives 
If 
your vehicle is certified  to meet  California Emission 
Standards  (see  the underhood  emission control label), 
it  is  designed  to operate  on fuels that  meet California 
specifications.  If this fuel  is not available  in states 
adopting California emissions standards, your vehicle 
will operate satisfactorily  on fuels  meeting federal 
specifications, but emission control  system  performance 
may  be  affected.  The  malfunction indicator  lamp  may 
turn  on (see  Malfunction Indicator 
Lamp on page 3-32) 
and your vehicle  may fail a  smog-check  test.  If  this 
occurs, return to  your authorized 
GM dealer  for 
diagnosis.  If it is determined that the condition is  caused 
by  the type  of fuel  used, repairs  may not be  covered 
by your  warranty.  To 
provide cleaner air,  all gasolines in  the United  States 
are  now  required 
to contain additives  that  will  help 
prevent engine  and  fuel  system  deposits from  forming, 
allowing your emission control  system to work 
properly.  You should  not have  to add  anything to  your 
fuel.  Gasolines containing oxygenates,  such as 
ethers  and ethanol,  and reformulated  gasolines  may  be 
available  in your area  to contribute  to clean  air. 
General Motors  recommends that you  use  these 
gasolines, particularly 
if they  comply  with the 
specifications described  earlier. 
Notice: Your  vehicle  was  not  designed  for  fuel  that 
contains  methanol.  Don’t  use  fuel containing 
methanol.  It  can  corrode  metal  parts in  your  fuel 
system  and  also  damage  the  plastic  and  rubber 
parts. That damage  wouldn’t be covered  under  your 
warranty. 
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        Page 234 of 378

When  you put the  fuel  cap  back  on,  turn it  to the  right 
(clockwise)  until you  hear  a  clicking sound.  Make 
sure  you  fully  install the cap.  The diagnostic  system  can 
determine 
if the fuel  cap has  been  left off or improperly 
installed.  This would  allow  fuel to evaporate into 
the 
atmosphere.  See  Malfunction  Indicator Lamp on 
page 
3-32. 
Notice: If you  need a new  fuel  cap, be  sure  to  get 
the  right  type.  Your  dealer  can  get  one  for  you. 
If you  get  the  wrong  type, it may  not fit properly. 
This  may  cause  your  malfunction  indicator  lamp  to 
light  and  may  damage  your  fuel  tank  and  emissions 
system.  See “Malfunction  Indicator  Lamp”  in 
the  Index. 
Filling  a  Portable  Fuel  Container 
~ .-ver  fil. - portable  fL--  cc..-ainer  while it is in 
your  vehicle.  Static  electricity  discharge  from 
the  container  can  ignite  the  gasoline  vapor.  You  can  be  badly  burned  and  your  vehicle 
damaged  if  this  occurs. 
To help  avoid  injury  to 
you  and  others: 
Dispense  gasoline  only  into  approved 
containers. 
Do  not  fill  a  container  while it is inside  a 
vehicle, 
in a  vehicle’s  trunk,  pickup  bed  or 
on  any  surface  other  than  the  ground. 
Bring  the fill nozzle in contact  with  the 
inside  of  the  fill  opening  before  operating 
the  nozzle.  Contact  should  be  maintained 
until  the  filling  is  complete. 
Don’t  smoke  while  pumping  gasoline. 
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        Page 285 of 378
Bulb Replacement 
For the proper  type of replacement  bulb,  see 
Replacement 
Bulbs on  page 5-66. 
For any  bulb  changing  procedure  not listed in this 
section,  contact  your  dealer. 
Halogen Bulbs 
Headlamps 
1. Open the  hood. 
Halogen  bulbs have  pressurized  gas inside 
and  can  burst 
if you drop  or  scratch  the  bulb. 
You  or  others  could be injured. Be sure  to read 
and 
follow the  instructions  on the  bulb 
package. 
2.  Remove  the  two  bolts  from  the  top 
of the 
headlamp  assembly. 
5-60