Page 278 of 408

Black plate (18,1)Cadillac ELR Owner Manual (GMNA-Localizing-U.S./Canada-6081525) -
2014 - Second Edition - 1/22/14
10-18 Vehicle Care
The coolant reservoir is located on
the passenger side of the engine
compartment. SeeEngine
Compartment Overview on
page 10-8.
The coolant level should be at or
above the cold fill line on the
coolant surge tank. If it is not, there
could be a leak in the cooling
system.
How to Add Coolant to the
Coolant Surge Tank
{Warning
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engine.
{Caution
This vehicle has a specific
coolant fill procedure. Failure to
follow this procedure could cause
the engine to overheat and be
severely damaged.
{Warning
The electric fans under the hood
can start up even when the
engine is not running and can
cause injury. Keep hands,
clothing, and tools away from any
underhood electric fan.
{Warning
Steam and scalding liquids from a
hot cooling system can blow out
and burn you badly. They are
(Continued)
Warning (Continued)
under pressure, and if you turn
the surge tank pressure
cap—even a little —they can
come out at high speed. Never
turn the cap when the cooling
system, including the surge tank
pressure cap, is hot. Wait for the
cooling system and surge tank
pressure cap to cool if you ever
have to turn the pressure cap.
If coolant is needed, add the proper
DEX-COOL coolant mixture at the
coolant surge tank.
Page 279 of 408

Black plate (19,1)Cadillac ELR Owner Manual (GMNA-Localizing-U.S./Canada-6081525) -
2014 - Second Edition - 1/22/14
Vehicle Care 10-19
The coolant surge tank pressure
cap can be removed when the
cooling system, including the surge
tank pressure cap and upper
radiator hose, is no longer hot.
1. Turn the pressure cap slowlycounterclockwise. If a hiss is
heard, wait for that to stop.
A hiss means there is still some
pressure left.
2. Keep turning the cap and remove it.3. Fill the coolant surge tank withthe proper mixture to the cold
fill line.
4. Replace the pressure cap. Be sure the pressure cap is
hand-tight and fully seated.
{Caution
If the pressure cap is not tightly
installed, coolant loss and
possible engine damage may
occur. Be sure the cap is properly
and tightly secured.
Engine Overheating
The vehicle has an indicator to warn
of engine overheating.
If the decision is made not to lift the
hood when this warning appears,
get service help right away. See
Roadside Service on page 13-5.
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface. Then check to see if the engine
cooling fans are running. If the
engine is overheating, the fans
should be running. If they are not,
do not continue to run the vehicle
and have the vehicle serviced.
{Caution
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty.
Washer Fluid
What to Use
When adding windshield washer
fluid to the vehicle, be sure to read
the manufacturer's instructions
before use. If operating the vehicle
in an area where the temperature
may fall below freezing, use a fluid
that has sufficient protection against
freezing.
Page 352 of 408

Black plate (2,1)Cadillac ELR Owner Manual (GMNA-Localizing-U.S./Canada-6081525) -
2014 - Second Edition - 1/22/14
11-2 Service and Maintenance
Because of the way people use
vehicles, maintenance needs vary.
There may need to be more
frequent checks and services. The
Additional Required Services -
Normal are for vehicles that:
.Carry passengers and cargo
within recommended limits on
the Tire and Loading Information
label. SeeVehicle Load Limits
on page 9-12.
.Are driven on reasonable road
surfaces within legal driving
limits.
.Use the recommended fuel. See
Fuel on page 9-66.
Refer to the information in the
Maintenance Schedule Additional
Required Services - Normal chart.
The Additional Required Services -
Severe are for vehicles that are:
.Mainly driven in heavy city traffic
in hot weather.
.Mainly driven in hilly or
mountainous terrain.
.Frequently towing a trailer.
.Used for high speed or
competitive driving.
.Used for taxi, police, or delivery
service.
Refer to the information in the
Maintenance Schedule Additional
Required Services - Severe chart.
{Warning
Performing maintenance work can
be dangerous and can cause
serious injury. Perform
maintenance work only if the
required information, proper tools,
and equipment are available.
If they are not, see your dealer to
have a trained technician do the
work. See Doing Your Own
Service Work on page 10-5.
Maintenance
Schedule
Owner Checks and Services
At Each Fuel Stop
.Check the engine oil level. See
Engine Oil on page 10-9.
Once a Month
.Check the tire inflation
pressures. See Tire Pressure on
page 10-48.
.Inspect the tires for wear. See
Tire Inspection on page 10-54.
.Check the windshield washer
fluid level. See Washer Fluid on
page 10-19.
.Engine, power electronics, and
high voltage battery pack
coolant level checks. See
Cooling System (Engine) on
page 10-14 orCooling System
(High Voltage Battery) on
page 10-15 orCooling System
(Power Electronics and Charger
Modules) on page 10-16.
Page 353 of 408

Black plate (3,1)Cadillac ELR Owner Manual (GMNA-Localizing-U.S./Canada-6081525) -
2014 - Second Edition - 1/22/14
Service and Maintenance 11-3
Engine Oil Change
Every 24 months or when the
CHANGE ENGINE OIL SOON
message displays, change the
engine oil and filter as soon as
possible, within the next 1 000 km/
600 mi. The engine oil and filter
must be changed at least once
every 24 months. After each oil and
filter change, the oil life system must
be reset. SeeEngine Oil Life
System on page 10-12. More
frequent changes may be required
when the vehicle is exposed to a
corrosive environment, such as
areas of high humidity, along an
ocean coast, and/or areas that
apply road salt during winter.
Your trained dealer technician can
perform this work. If the engine oil
life system is reset accidentally,
service the vehicle within 5 000 km/
3,000 mi since the last service.
Reset the oil life system when the
oil is changed.
Tire Rotation and Required
Services Every 12 000 km/
7,500 mi
Rotate the tires, if recommended for
the vehicle, and perform the
following services. See Tire
Rotation on page 10-54.
.Check engine oil level and oil
life percentage. If needed,
change engine oil and filter, and
reset oil life system. See Engine
Oil on page 10-9 andEngine Oil
Life System on page 10-12.
.Check engine coolant level. See
Engine Coolant on page 10-16.
.Check windshield washer fluid
level. See Washer Fluid on
page 10-19.
.Visually inspect windshield wiper
blades for wear, cracking,
or contamination. See Exterior
Care on page 10-80. Replace
worn or damaged wiper blades.
See Wiper Blade Replacement
on page 10-25.
.Check tire inflation pressures.
See Tire Pressure on
page 10-48.
.Inspect tire wear. See Tire
Inspection on page 10-54.
.Visually check for fluid leaks.
.Inspect engine air cleaner filter.
See Engine Air Cleaner/Filter on
page 10-13.
.Inspect brake system.
.Visually inspect steering,
suspension, and chassis
components for damaged, loose,
or missing parts or signs of
wear. See Exterior Care on
page 10-80.
.Check restraint system
components. See Safety System
Check on page 3-18.
.Visually inspect fuel system for
damage or leaks.
.Visually inspect exhaust system
and nearby heat shields for
loose or damaged parts.