Scheduled  Maintenance 
The  services  shown in this schedule up to 100,000 miles 
(1 66 000 km)  should  be repeated after 100,000 miles 
(1 66 000 km)  at  the  same  intervals for the  life  of 
this  vehicle.  The  services  shown  at 
150,000 miles 
(240 000 km)  should  be repeated at the  same  interval 
after 
150,000 miles (240 000 km)  for the  life of this 
vehicle. 
See 
Part 5: Owner  Checks  and  Services on  page 6-10 
and Part C: Periodic  Maintenance  Inspections on 
page 
6- 14. 
Footnotes 
t The U.S. Environmental  Protection Agency or the 
California  Air  Resources  Board  has  determined  that the 
failure  to  perform  this  maintenance  item will not nullify 
the  emission  warranty  or limit recall liability prior  to 
the  completion  of the  vehicle 
's useful life.  We, however, 
urge  that  all recommended  maintenance  services be 
performed  at the  indicated  intervals and the 
mainienance 
be recoraea. 
+ A  good  time  to  check  your  brakes is during tire 
rotation.  See  Brake  System  Inspection 
on page 6-15. 
Engine Oil and Chassis  Lubrication 
Scheduled  Maintenance 
Change  engine oil and filter as indicated  by the GM 
Oil Life System  (or every 12 months, whichever 
occurs first).  Reset the  system. 
Your  vehicle  has a computer  system that lets you know 
when  to  change the engine oil and filter. This is based  on 
engine  revolutions and engine temperature, and  not on 
mileage.  Based on driving  conditions, the mileage at 
which  an oil change will be indicated can  vary 
considerably. For the  oil life  system  to  work properly, 
you  must  reset the system  every time the 
oil is changed. 
When  the system has calculated  that oil life has been 
diminished,  it will  indicate that an oil change  is 
necessary. 
A change engine oil  message will come  on. 
Change  your oil as soon 
as possible within the  next 
two  times you stop  for  fuel. It 
is possible  that, if you  are 
driving under the  best conditions, the oil  life system  may  not  indicate that  an oil change  is necessary for over 
a  year.  However,  your engine oil  and filter  must  be 
changed at least once  a  year  and  at this time the system 
must  be reset. It  is also  important  to check  your oil 
regularly and  keep it at the  proper  level. 
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