check engine CHEVROLET BLAZER 2005 2.G Workshop Manual

Footnotes
†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
maintenance be recorded.
#Lubricate the front suspension, ball joints, steering
linkage, parking brake cable guides, propshaft splines,
universal joints and brake pedal springs.
+A good time to check your brakes is during tire
rotation. See Brake System Inspection on page 6-31.
**Drive axle service. See Part D: Recommended Fluids
and Lubricants on page 6-32for proper lubricant to use.
Check uid level and add uid as needed.
If your vehicle has a locking differential, drain uid
and rell at rst engine oil change.
7,500 Miles (12 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
15,000 Miles (25 000 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Inspect engine air cleaner lter. If necessary, replace
the lter. If vehicle is driven in dusty/dirty conditions,
inspect lter at every engine oil change. SeeEngine
Air Cleaner/Filter on page 5-18for more information.
An Emission Control Service. (See footnote †.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Change automatic transmission uid and lter if the
vehicle is mainly driven under one or more of these
conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
6-18

When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the uid and lter every 50,000 miles
(83 000 km).
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
22,500 Miles (37 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
30,000 Miles (50 000 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Inspect engine air cleaner lter. If necessary, replace
the lter. If vehicle is driven in dusty/dirty conditions,
inspect lter at every engine oil change. SeeEngine
Air Cleaner/Filter on page 5-18for more information.
An Emission Control Service. (See footnote †.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Change automatic transmission uid and lter if the
vehicle is mainly driven under one or more of these
conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the uid and lter every 50,000 miles
(83 000 km).
6-19

❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
❑Replace fuel lter.An Emission Control Service.
(See footnote †.)
37,500 Miles (62 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
45,000 Miles (75 000 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Replace engine air cleaner lter. SeeEngine Air
Cleaner/Filter on page 5-18for more information.An
Emission Control Service.❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Change automatic transmission uid and lter if the
vehicle is mainly driven under one or more of these
conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the uid and lter every 50,000 miles
(83 000 km).
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
6-20

50,000 Miles (83 000 km)
❑If you have not used your vehicle under severe
conditions listed previously and, therefore, have
not changed your automatic transmission uid,
change both the uid and lter. Manual transmission
uid does not require change.
❑Automatic Transfer Case Only: Change transfer
case uid.
52,500 Miles (87 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
60,000 Miles (100 000 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)❑Inspect engine air cleaner lter. If necessary, replace
the lter. If vehicle is driven in dusty/dirty conditions,
inspect lter at every engine oil change. SeeEngine
Air Cleaner/Filter on page 5-18for more information.
An Emission Control Service. (See footnote †.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Change automatic transmission uid and lter if the
vehicle is mainly driven under one or more of these
conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the uid and lter every 50,000 miles
(83 000 km).
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
❑Replace fuel lter.An Emission Control Service.
(See footnote †.)
6-21

67,500 Miles (112 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
75,000 Miles (125 000 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Inspect engine air cleaner lter. If necessary, replace
the lter. If vehicle is driven in dusty/dirty conditions,
inspect lter at every engine oil change. SeeEngine
Air Cleaner/Filter on page 5-18for more information.
An Emission Control Service. (See footnote †.)❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Change automatic transmission uid and lter if the
vehicle is mainly driven under one or more of these
conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the uid and lter every 50,000 miles
(83 000 km).
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
6-22

82,500 Miles (137 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
90,000 Miles (150 000 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Replace engine air cleaner lter. SeeEngine Air
Cleaner/Filter on page 5-18for more information.
An Emission Control Service.❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Change automatic transmission uid and lter if the
vehicle is mainly driven under one or more of these
conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the uid and lter every 50,000 miles
(83 000 km).
❑Replace fuel lter.An Emission Control Service.
(See footnote †.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
6-23

97,500 Miles (162 500 km)
❑Change engine oil and lter (or every 12 months,
whichever occurs rst).An Emission Control
Service.
❑Lubricate chassis components (or every 12 months,
whichever occurs rst).(See footnote #.)
❑Check rear/front axle uid level and add uid as
needed. Check constant velocity joints and axle seals
for leaking.(See footnote **.)
❑Rotate tires. SeeTire Inspection and Rotation on
page 5-64for proper rotation pattern and additional
information.(See footnote +.)
100,000 Miles (166 000 km)
❑Inspect spark plug wires.An Emission Control
Service.
❑Replace spark plugs.An Emission Control Service.
❑If you have not used your vehicle under severe
service conditions listed previously and, therefore,
have not changed your automatic transmission uid,
change both the uid and lter. Manual transmission
uid does not require change.
❑Automatic Transfer Case Only: Change transfer
case uid.
❑Inspect Positive Crankcase Ventilation (PCV) valve.
An Emission Control Service.
150,000 Miles (240 000 km)
❑Drain, ush and rell cooling system (or every
60 months since last service, whichever occurs rst).
SeeEngine Coolant on page 5-25for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.An Emission Control Service.
❑Inspect engine accessory drive belt.An Emission
Control Service.
6-24

Part B: Owner Checks and Services
Listed in this part are owner checks and services
which should be performed at the intervals specied to
help ensure the safety, dependability and emission
control performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-13for further
details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-25for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer tank and add the proper uid if necessary.
SeeWindshield Washer Fluid on page 5-37for further
details.
At Least Once a Month
Tire Ination Check
Visually inspect your tires and make sure tires are
inated to the correct pressures. Do not forget to check
your spare tire. SeeTires on page 5-56for further
details.
Cassette Tape Player Service
Clean cassette tape player. Cleaning should be done
every 50 hours of tape play. SeeAudio System(s)
on page 3-39for further details.
6-25

At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specied in Part D.
Body Lubrication Service
Lubricate all hood hinges, hood latch assembly,
secondary latch, pivots, spring anchor, release pawl,
door hinges, fuel door hinge, endgate hinges, outer
tailgate handle pivot points, tailgate hinges, tailgate
mounted spare tire (if equipped), glove box and console
doors, moving seat hardware and folding seat
hardware. Part D tells you what to use. More frequent
lubrication may be required when exposed to a corrosive
environment.
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-36if
necessary.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. On automatic transmission vehicles, try to start the
engine in each gear. The starter should work only
in PARK (P) or NEUTRAL (N). If the starter works in
any other position, your vehicle needs service.
On manual transmission vehicles, put the shift lever
in NEUTRAL (N), push the clutch down halfway and
try to start the engine. The starter should work only
when the clutch is pushed down all the way to the
oor. If the starter works when the clutch is not
pushed all the way down, your vehicle needs service.
6-27

Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a level
surface.
2. Firmly apply the parking brake, SeeParking Brake
on page 2-36if necessary.
Be ready to apply the regular brake immediately if
the vehicle begins to move.
3. With the engine off, turn the ignition to RUN, but do
not start the engine. Without applying the regular
brake, try to move the shift lever out of PARK (P)
with normal effort. If the shift lever moves out
of PARK (P), your vehicle needs service.
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition to LOCK in each shift lever position.
With an automatic transmission, the ignition should
turn to LOCK only when the shift lever is in
PARK (P).
With a manual transmission, the ignition should turn
to LOCK only when you press the key release
button.
On all vehicles, the key should come out only in LOCK.
6-28