1999 CADILLAC CATERA engine overheat

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6-21
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, drinkable water and
one
-half DEX-COOL
coolant which won't damage
aluminum parts. If you use this coolant mixture, you
don't need to add anything else.
CAUTION:
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 mixture will. Your vehicle's coolant
warning system is set for the proper coolant
mixture. With plain water or the wrong mixture,
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 mixture of clean, drinkable water and
DEX
-COOL
coolant.

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6-22
NOTICE:
If you use an improper coolant mixture, your
engine could overheat and be badly damaged.
The repair cost wouldn't be covered by your
warranty. Too much water in the mixture 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.
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.
Checking Coolant
The surge tank is located behind the air cleaner on the
passenger's side of the engine.
The cooling system when hot is under a lot of pressure.
If the low coolant warning light on the instrument panel
appears, you will need to add coolant.

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8-4
Driving (Continued)
Night 4-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Curves 4-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Grades While Towing a Trailer 4-36 . . . . . . . . . . . . . . .
On Hill and Mountain Roads 4-23 . . . . . . . . . . . . . . . . . . . .
On Snow or Ice 4-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Through Deep Standing Water 4-19 . . . . . . . . . . . . . . . . . . .
Winter 4-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
With a Trailer 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Equipment, Adding 2-19 . . . . . . . . . . . . . . . . . . . .
Electrical System 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night Rearview Mirror 2-47 . . . . . . . . . .
Electronic Climate Control (ECC) 3-2 . . . . . . . . . . . . . . . . . . .
Electronic Level Control 4-30 . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency Trunk Release 2-12 . . . . . . . . . . . . . . . . . . . . . . . .
Engine 6-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner/Filter 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compartment Relay Center 6-61 . . . . . . . . . . . . . . . . . . . . .
Coolant 6-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Heater 2-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Temperature Gage 2-69 . . . . . . . . . . . . . . . . . . . . .
Coolant Temperature Warning Light 2-68 . . . . . . . . . . . . . .
Cooling When Trailer Towing 4-37 . . . . . . . . . . . . . . . . . . .
Exhaust 2-11, 2-30, 2-31, 4-28 . . . . . . . . . . . . . . . . . . . . . .
Identification 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overheating 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running While You're Parked 2-31 . . . . . . . . . . . . . . . . . . .
Specifications 6-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speed Limiter 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your 2-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine Oil 6
-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additives 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Kind to Use 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What to do with Used 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . .
When to Add 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When to Change 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
English/Metric Display 3-3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethanol 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust, Engine 2-11, 2-30, 2-31, 4-28 . . . . . . . . . . . . . . . . .
Extender, Safety Belts 1-52 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior Lamps 2-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan Button, Climate Control System 3-2 . . . . . . . . . . . . . . . .
Features and Controls 2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling a Portable Fuel Container 6-8 . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter, Air 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter Replacement, Passenger Compartment Air 6-17 . . . . . .
Finish Care 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finish Damage 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIRST (1) Gear, Automatic Transmission 2-23 . . . . . . . . . . . .
Flashers, Hazard Warning 5-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Flash-To-Pass 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flat Tire, Changing 5-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Floor Mats 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid
Brake 6
-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Steering 6-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Washer 6-25 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Lamps 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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8-7
Power Door 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programmable Automatic Door 2-5 . . . . . . . . . . . . . . . . . . .
Rear Door Security 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of Control 4-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Coolant Warning Light 2-69 . . . . . . . . . . . . . . . . . . . . . .
Low Fuel Light 2-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Washer Fluid Warning Light 2-74 . . . . . . . . . . . . . . . . . .
Lumbar Support, Manual 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance, Normal Replacement Parts 6-63 . . . . . . . . . . .
Maintenance, Underbody 6-52 . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Trailer Towing 4-37 . . . . . . . . . . . . . . . . .
Malfunction Indicator Lamp 2-70 . . . . . . . . . . . . . . . . . . . . . .
Manual Folding Outside Rearview Mirrors 2-49 . . . . . . . . . . .
Manual Lumbar Support 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Operation (Climate Controls) 3-4 . . . . . . . . . . . . . . . .
Map Lamps 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Map Pockets 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Seat and Mirrors 1-3 . . . . . . . . . . . . . . . . . . . . . . . . .
Methanol 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mirrors 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convex Outside 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night Rearview 2-47 . . . . . . . . . . . . . .
Heated Rearview 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illuminated Visor Vanity 2-51 . . . . . . . . . . . . . . . . . . . . . . .
Manual Folding Outside Rearview 2-49 . . . . . . . . . . . . . . .
Power Remote Control 2-48 . . . . . . . . . . . . . . . . . . . . . . . . .
MMT 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mobility Program for Persons with Disabilities 7-5 . . . . . . . . .
Mode Button 3-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model Reference ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mountain Roads 4
-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multifunction Lever 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net, Convenience 2-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NEUTRAL (N), Automatic Transmission 2-22 . . . . . . . . . . . .
New Vehicle ªBreak-Inº 2-16 . . . . . . . . . . . . . . . . . . . . . . . . .
Night Vision 4-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Maintenance Replacement Parts 6-63 . . . . . . . . . . . . .
Odometer 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Odometer, Trip 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off-Road Recovery 4-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil, Engine 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Light/Gage 2-72 . . . . . . . . . . . . . . . . . . . . . . . . . .
OnStar
System 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Service and Owner Publications 7-11, 7-12, 7-13 . . . .
Outside Rearview Mirrors, Manual Folding 2-49 . . . . . . . . . .
Outside Temperature Display 3-3 . . . . . . . . . . . . . . . . . . . . . . .
Overheating Engine 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Owner Publications, Ordering 7-11, 7-12, 7-13 . . . . . . . . . . .
Paint Spotting, Chemical 6-52 . . . . . . . . . . . . . . . . . . . . . . . .
Panel, Instrument 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARK (P)
Automatic Transmission 2
-21 . . . . . . . . . . . . . . . . . . . . . . .
Shifting Into 2-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shifting Out of 2-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .