1997 GMC JIMMY engine overheat

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

Adding only plain water to your cooling system can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mix will. Your vehicle’s coolant warning
system
is set for the proper coolant mix. With
plain water or the wrong mix, your engine could
get too hot but you wouldn’t get the overheat warning. Your engine could catch fire and you or
others could be burned. Use a
50/50 mix of clean
water and
DEX-COOL@ coolant.
NOTICE:
If you use an improper coolant mix, your engine
could overheat and be badly damaged. The
repair cost wouldn’t be covered by your
warranty.
Too much water in the mix can freeze
and crack the engine, radiator, heater core and
other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling
system.
I NOTICE:
If you use the proper coolant, you don’t have to
add extra inhibitors or additives which claim to improve the system. These can be harmful.
6-24

Radiator Pressure Cap
NOTICE:
Your radiator cap is a 15 psi (105 kPa)
pressure-type cap and must be tightly installed to
prevent coolant
loss and possible engine damage
fronl overheating. Be sure the arrows
on the cap
line up with the overflow tube on the radiator
filler neck.
Thermostat
Engine coolant temperattrre is controlled by a thermostat
in the engine coolant system. The thermostat stops the
flow of coolant through the radiator until the coolant
reaches
a preset temperature.
Power Steerinp Fluid
6-26

Engine ........................................ 6-8
Coolant Heater
............................... 2-17
Coolant Level Check
.......................... 7-46
Coolant Temperature Gage
..................... 2-76
Fan Noise
................................... 5-22
Exhaust
..................................... 2-34
Identification
................................ 6-58
OilLevelCheck
............................... 7-46
Overheating
................................. 5-12
Specifications
................................ 6-63
Running While Parked
......................... 2-35
Starting
..................................... 2-15
Engine Oil
..................................... 6-9
Additives
................................... 6- 12
Checlung
.................................... 6-9
Pressure Gage
................................ 2-79
When to Change
.............................. 6-12
Express-Down Window
.......................... 2-36
Exterior Metal Parts, Protecting
.................... 6-55
Adding
..................................... 6-10
Kindtouse
................................. 6-10
Used
....................................... 6-13
Exhaust, Engine
................................ 2-34
Fabric Cleaning
............................... 6-50
Fifth Gear, Manual Transmission
................... 2-21
FillingYourTank
................................ 6-5
Filter
Air ........................................ 6-13
Remote Oil
.................................. 6-12 Finishcare
. ............................i...... 6-54
First Gear Finish Damage
................................. 6-56
Automatic Transmission
....................... 2-20
Flashers, Hazard Warning
......................... 5-2
Flat Tire, Changing
............................. 5-23
Fluids and Lubricants
....................... 6-64, 7-52
Fog Lamp Switch ............................... 2-47
Foreign Countries, Fuel
........................... 6-4
Fourth Gear, Manual Transmission
................. 2-21
Four-wheel Drive
......................... 2-23, 6-21
Front Map Lamps
............................... 2-48
Front Reading
Lamps .................. 2-47,2-51, 6-38
Front Sidemarker Lamp Bulb Replacement
........... 6-36
FrontStorageArea
.............................. 2-56
ManualTransmission
.......................... 2-21
French Language Manual
u
FrontAxle .................................... 6-22
.. ...........................
FrontTowing .................................. 5-10
Front Turn Signal Lamp Bulb Replacement
.......... 6-36
Fuel
.......................................... 6-3
Filling Your
Tank .............................. 6-5
Foreign Countries
.............................. 6-4
Fuses and Circuit Breakers
....................... 6-59
Gage
....................................... 2-81
bages Engine Coolant TemDerature
.................... 2-76 v L
Engine Oil Pressure ........................... 2-79
Fuel
....................................... 2-81
9-4 b

Methanol .................................... 6-4
Mirrors
....................................... 2-49
Convex Outside
.............................. 2-50
Inside Day/Night Rearview
..................... 2-49
Outside
..................................... 2-49
Visor Vanity
................................. 2-62
Model Reference
................................. vi
Mountain Roads ................................ 4-35
Multifunction Lever
............................. 2-38
Net. Convenience
.............................. 2-57
Neutral
Automatic Trans~nission
....................... 2- I9
Manual Transmission
.......................... 2-22
New Vehicle "Break-In"
......................... 2- I3
Nightvision
................................... 4-28
Normal Maintenance Replacement Parts
............. 6-63
Odometer
.................................... 2.68
Off-Road Driving .............................. 4- 15
Off-Road Recovery
............................. 4- I 1
Opener, Garage Door ............................ 2-5 1
Ordering Owner and Service Publications ....... 8- 11. 8- 12
Outside Mirror
Manual Adjust
............................... 2-49
Power Remote Control
......................... 2-49
Convex
..................................... 2-50
Overdrive, Automatic Transmission
................ 2-20
Oil.
Engine
..................................... 6-9 Overhead Console
.............................. 2-50
Overheating Engine
............................. 5-12
Owner Checks and Services
....................... 7-46
Owner Publications
........................ 8-11 .
Paint Spotting. Chemical ........................ 6-56
Park
Automatic Transmission
....................... 2-18
Shifting Into ................................. 2-30
Shifting Out of
............................... 2-33
AtNight
.................................... 2-12
Brake ...................................... 2-29
Brake Mechanism Check
....................... 7-49
Lots ....................................... 2-12
On Hills with a Trailer ......................... 4-52
Over Things That Burn
........................ 2-34
Your Vehicle. Manual Transmission
.............. 2-33
Passing
....................................... 4-12
Payload
....................................... 4-44
Periodic Maintenance Inspections
.................. 7-50
Power
Accessory Outlets
............................ 2-63
DoorLocks
................................... 2-5
Remote Control Mirror
........................ 2-49
Steering
..................................... 4-9
Steering Fluid
................................ 6-26
Windows
................................... 2-36
Powerseat ..................................... 1-3
Lumbar Controls .............................. 1-4
Parking
9-7