2007 CHEVROLET SUBURBAN heater

What to Use
Use a mixture of one-half clean, drinkable water
and one-half DEX-COOL®coolant which will
not damage aluminum parts. If you use this coolant
mixture, you do not need to add anything else.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as 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 would
not get the overheat warning. Your engine
could catch re and you or others could
be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.Notice:If you use an improper coolant
mixture, your engine could overheat and be
badly damaged. The repair cost would not 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 extra inhibitors and/or
additives in your vehicle’s cooling system, you
could damage your vehicle. Use only the
proper mixture of the engine coolant listed in
this manual for the cooling system. See
Recommended Fluids and Lubricants on
page 590for more information.
471

If No Steam Is Coming From Your
Engine
The ENGINE OVERHEATED STOP ENGINE or
the ENGINE OVERHEATED IDLE ENGINE
message, along with a low coolant condition, can
indicate a serious problem.
If you get an engine overheat warning, but see or
hear no steam, the problem may not be too
serious. Sometimes the engine can get a little too
hot when you:
Climb a long hill on a hot day.
Stop after high-speed driving.
Idle for long periods in traffic.
Tow a trailer. SeeTowing a Trailer on
page 422.If you get the ENGINE OVERHEATED STOP
ENGINE or the ENGINE OVERHEATED IDLE
ENGINE message with no sign of steam, try this
for a minute or so:
1. If you have an air conditioner and it is on, turn
it off.
2. Turn on your heater to full hot at the highest
fan speed and open the windows as
necessary.
3. In heavy traffic, let the engine idle in
NEUTRAL (N) while stopped. If it is safe to do
so, pull off the road, shift to PARK (P) or
NEUTRAL (N) and let the engine idle.
If you no longer have the overheat warning, you
can drive. Just to be safe, drive slower for
about 10 minutes. If the warning does not come
back on, you can drive normally.
If the warning continues, pull over, stop, and park
your vehicle immediately.
475

The coolant level should be at or above the FULL
COLD mark. If it is not, you may have a leak at
the pressure cap or in the radiator hoses,
heater hoses, radiator, water pump or somewhere
else in the cooling system.
{CAUTION:
Heater and radiator hoses, and other
engine parts, can be very hot. Do not
touch them. If you do, you can be burned.
Do not run the engine if there is a leak. If
you run the engine, it could lose all
coolant. That could cause an engine re,
and you could be burned. Get any leak
xed before you drive the vehicle.
478

Notice:Engine damage from running your
engine without coolant is not covered by your
warranty. SeeOverheated Engine Protection
Operating Mode on page 476for information on
driving to a safe place in an emergency.
Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core, or
radiator corrosion. In addition, the engine
coolant could require changing sooner, at
30,000 miles (50 000 km) or 24 months,
whichever occurs rst. Any repairs would not
be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your
vehicle.
How to Add Coolant to the Coolant
Surge Tank
If you have not found a problem yet, check to see
if coolant is visible in the surge tank. If coolant
is visible but the coolant level is not at or above the
FULL COLD mark, add a 50/50 mixture of
clean, drinkable water and DEX-COOL
®coolant at
the coolant surge tank, but be sure the cooling
system, including the coolant surge tank pressure
cap, is cool before you do it. SeeEngine
Coolant on page 470for more information.
479

Notice:In cold weather, water can freeze and
crack the engine, radiator, heater core and
other parts. Use the recommended coolant and
the proper coolant mixture.
{CAUTION:
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.1. You can remove the
coolant surge tank
pressure cap
when the cooling
system, including
the coolant
surge tank pressure
cap and upper
radiator hose, is no
longer hot.
Turn the pressure cap slowly counterclockwise
about one full turn. If you hear a hiss, wait
for that to stop. A hiss means there is
still some pressure left.
2. Then keep turning the pressure cap slowly,
and remove it.
481

Cleaning (cont.)
Weatherstrips........................................... 556
Windshield, Backglass, and
Wiper Blades........................................ 558
Climate Control System............................... 227
Dual Automatic......................................... 231
Outlet Adjustment..................................... 238
Rear Air Conditioning and Heating
System................................................. 239
Rear Air Conditioning and Heating
System, Electronic................................ 240
Clock.........................................291, 292, 293
Collision Damage Repair............................. 610
Comfort Guides, Rear Safety Belt................. 56
Compass............................................162, 166
Content Theft-Deterrent............................... 135
Control of a Vehicle..................................... 360
Coolant
Engine Temperature Gage........................ 252
Heater, Engine......................................... 143
Surge Tank Pressure Cap........................ 473
Cooling System........................................... 477
Cruise Control............................................. 211
Cruise Control Light.................................... 258
Cupholder(s)................................................ 190Customer Assistance Information
Courtesy Transportation........................... 607
Customer Assistance for Text
Telephone (TTY) Users ......................... 602
Customer Assistance Offices.................... 602
Customer Satisfaction Procedure.............. 598
GM Mobility Reimbursement Program...... 603
Reporting Safety Defects to
General Motors..................................... 615
Reporting Safety Defects to the
Canadian Government.......................... 615
Reporting Safety Defects to the
United States Government.................... 615
Roadside Assistance Program.................. 604
Service Publications Ordering
Information........................................... 616
D
Daytime Running Lamps............................. 216
Defensive Driving........................................ 356
Delayed Locking.......................................... 123
Disc, MP3..........................................321, 327
Doing Your Own Service Work.................... 445
622

Dome Lamp Override.................................. 219
Dome Lamps............................................... 219
Door
Delayed Locking...................................... 123
Locks....................................................... 122
Power Door Locks................................... 123
Programmable Automatic Door Locks....... 123
Rear Door Security Locks........................ 124
Driver
Position, Safety Belt................................... 43
Driver Information Center (DIC)................... 260
DIC Operation and Displays............261, 267
DIC Vehicle Customization....................... 280
DIC Warnings and Messages................... 270
Driving
At Night................................................... 389
City.......................................................... 393
Defensive................................................. 356
Drunken................................................... 357
Freeway................................................... 394
Hill and Mountain Roads.......................... 398
In Rain and on Wet Roads...................... 390
Off-Road.................................................. 372
Recovery Hooks....................................... 406
Rocking Your Vehicle to Get it Out.......... 405
Winter...................................................... 400Dual Automatic Climate Control System....... 231
DVD
Rear Seat Entertainment System............. 337
E
Electrical System
Add-On Equipment................................... 563
Center Instrument Panel Fuse Block........ 566
Fuses and Circuit Breakers...................... 564
Instrument Panel Fuse Block................... 565
Power Windows and Other Power
Options................................................. 564
Underhood Fuse Block............................. 567
Windshield Wiper Fuses........................... 564
Engine
Air Cleaner/Filter...................................... 464
Check and Service Engine Soon Light..... 253
Coolant.................................................... 470
Coolant Heater......................................... 143
Coolant Temperature Gage...................... 252
Drive Belt Routing.................................... 593
Engine Compartment Overview................ 458
Exhaust................................................... 160
Fan Noise................................................ 483
Oil ........................................................... 459
623

G
Gage
Engine Coolant Temperature.................... 252
Fuel......................................................... 259
Oil Pressure............................................. 256
Speedometer........................................... 244
Tachometer.............................................. 244
Voltmeter Gage........................................ 249
Garage Door Opener................................... 178
Gasoline
Octane..................................................... 447
Specications........................................... 447
Glove Box................................................... 190
GM Mobility Reimbursement Program.......... 603
H
Hazard Warning Flashers............................ 204
Head Restraints............................................ 18
Headlamp
Aiming..................................................... 499
Headlamps
Bulb Replacement.................................... 502
Daytime Running Lamps.......................... 216
Flash-to-Pass........................................... 207
Halogen Bulbs......................................... 502Headlamps (cont.)
High/Low Beam Changer......................... 207
On Reminder........................................... 216
Heated Seats................................................ 12
Heater......................................................... 227
Heater......................................................... 231
Highbeam On Light..................................... 259
Highway Hypnosis....................................... 397
Hill and Mountain Roads............................. 398
Hood
Checking Things Under............................ 456
Release................................................... 457
Horn............................................................ 204
How to Use This Manual................................ 4
How to Wear Safety Belts Properly............... 43
I
Ignition Positions......................................... 140
Infants and Young Children, Restraints.......... 64
Ination - Tire Pressure............................... 515
Instrument Panel
Overview.................................................. 202
Instrument Panel (I/P)
Brightness................................................ 219
Cluster..................................................... 243
625