1997 GMC JIMMY engine

When to Add Oil
If the oil is at or below the ADD line. then you'll need
to add at least one quurt of oil. But you must use the
right kind. This part explains what kind
of oil to LIS~. For
crankcase capacity. see "Capacities and Specifications"
in the Index.
NOTICE:
Don't add too much ail. If your engine has so
much oil that the oil level gets above the
cross-hatched area that
shows the proper
operating range, your engine could be damaged.
Be sure to fill it enough to put the levcl somewhere in
the proper operating range. Push the dipstick all the way
back in when yo~1'1-e tlmugl1.
What Kind of Oil to Use
6-10

L
HOT
WEATHER
FiI 'C
RECOMMENDED SAE VlSCOSlTV GRADE ENGlNE OILS
FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST
SAE
VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE.
~~
SA€ 1OW-30
SAE SW-30 PREFERRED
LOOK
FOR THIS
SYMBOL
COLD
WEATHER
DO NOT USE SAE 2OW-50 OR ANY OTHER
GRADE OIL NOT RECOMMENDED
I NOTICE:
Use only engine oil with the American Petroleum
Institute
Certified For Gasoline Engines
"Starburst" symbol. Failure to use the
reconmended
oil can result in engine damage not
covered
by your warranty.
6-11

Engine Oil Additives
Don't add anything to your oil. YOLK GM dealer is ready
to advise
if you think something should be added.
When to Change Engine Oil
If any one of these is true for you. LIS~ the short trip/city
. maintenxm schedule:
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such as frequent
driving
in stop-and-go traffic).
0 You operate your vehicle in dusty areas or
off-road frequently.
YOLI frequently tow a trailer or use a carrier on top of
your vehicle.
The vehicle is used for delivery service, police, taxi
or other commercial application. Driving under
these conditions causes engine oil to
break
down sooner. If any one of these is true for your
vehicle. then you need to change your
oil and filter
every
3.000 miles (5 000 km) or 3 months -- whichever
occurs first.
Remote Oil Filter (Four-wheel Drive)
The ;1ccess door for the remote oil filter is in the steering
linkage shicld
assembly located under the radiator
support. Twist the
screw to unlock or lock the door.
Make sure
if you open the door, it is securely closed
when you are finished.
6-12

Automatic Transmission Fluid
Operating the engine with the air cleaner off can
cause you or others
to be burned. The air cleaner
not only cleans the air, it stops flame
if the engine
backfires.
If it isn't there, and the engine
backfires, you could be burned. Don't drive with
it
off, and be careful working on the engine with
the air cleaner
off.
I NOTICE:
If the air cleaner is off, a backfire can cause a
damaging engine fire. And, dirt can easily get
into your engine, which
will damage it. Always
have the air cleaner
in place when you're driving.
When to Check and Change
A good time to check your automatic transmission fluid
level is when the engine oil is changed.
Change both the fluid
and filter every 50.000 miles
(83 000 km) 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, the fluid and filter do not require changing.
See "Scheduled Maintenance Services"
in the Index.
6-14

How to Check
Because this operation can be a little difficult, you may
choose to hm;e this done at your
GM dealership
Service Department.
If you do it yourself, be sure to follow all the
instructions here,
or you could get a false reading
on the dipstick.
NOTICE:
Too much or too little fluid can damage your
transmission.
Too much can mean that some of
the fluid could come out and fall on hot engine
parts or exhaust system parts, starting a fire. Be
sure
to get an accurate reading if you check your
transmission fluid.
Wait at least 30 minutes before checking the
transmission fluid level
if you have been driving:
0 When outside temperatures are above 90°F (32°C).
At high speed for quite a while.
0 In heavy traffic -- especially in hot weather.
0 While pulling a trailer.
To get the right reading, the fluid slwuld be at normal
operating temperature. which
is 180°F to 200°F (82°C
to 93°C).
Checking Transmission Fluid Hot
Get the vehicle warmed up by driving about 15 miles
(24 km) when outside temperatures are above 50°F
( 10°C). If it's colder than 50°F ( IOOC), drive the
vehicle
in DRIVE (D) until the engine temperature gage
rnoves and then remains steady for
10 minutes. Then
follow the hot check procedures.
6-15

Checking Transmission Fluid Cold
A cold check is made after the vehicle hus been sitting
for eight hours or
Inore with the engine off and is lwd
only as a reference. Let the engine run rlt idle for five
minutes
if outside temperatures are 50°F ( 10°C) oI
more. If it’s colder than 50°F ( IOOC), you may have to
idle the engine longer. Should the fluid level be low
during a cold check, you rrlwst perfor111 a hot check
before adding fluid. This
will give you a more accurate
reading
of the fluid level.
Checking the Fluid Hot or Cold
Park your vehicle on a level place. Keep the
engine running.
With the parking brake applicd. place the shift le\;er
in PARK (P).
With your foot on the brake pedal, move the shift
lever through each
gear range, pausing for about
three seconds
in each range. Then. position the shit’t
lever
in PARK (P).
Let the engine run at idle for three minutes or more.
I. Flip the handle LIP and then pull out the dipstick and
wipc it with a clean rag or paper towel.
2. Push it back in all the way, wait three seconds and
then pull it back out again.
6-16

Manual Transmission Fluid
When to Check
A good time to have it checked is when the engine oil is
changed. However, the fluid in YOLK manual
transmission doesn't require changing.
How to Check
Because this operation can be a little dii'licult, you
may choose to have this done at your GM dealership
Service Department.
If you do it yourself, be sure to follow all the
instructions here, or you could get
false reading.
NOTICE:
Too much or too little fluid can damage your
transmission.
Too much can mean that some of
the fluid could come out and fall on hot engine
parts or exhaust system parts, starting a
fire. Be
~ sure to get an accurate reading if you check your
~ transmission fluid.
6-18

Engine Coolant
The cooling s stem in your vehicle is filled with
DEX-COOL engine coolant. This coolant is designed
to remain in your vehicle
for 5 years or 150,000 miles
(240 000 km) whichever occurs first, if you add only
DEX-COOL’ extended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem with
engine overheating, see “Engine Overheating” in
the Index.
A 50/50 mixture of water and the DEX-COOL@ coolant
for your vehicle will:
Give freezing protection down to -34°F (-37°C).
0 Give boiling protection up to 265 OF ( 129 O C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as
8
they should.
NOTICE:
When .adding coolant, it is important that you use
only
DEX-COOL@ (silicate-free) coolant.
If coolant other than DEX-COOL@ is added to
the system, premature engine, heater core
or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs
first. Damage caused by the use
of coolant other than DEX-COOL@ is not
covered by your new vehicle warranty.
What to Use
Use a mixture of one-half clean water (preferably
distilled) and one-half DEX-COOL@ coolant which
won’t damage aluminum parts. If you use this mixture,
you don’t need to add anything else.
6-23