
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Fan
If the coolant inside the coolant recovery tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.The coolant level should
be at least up to 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.
5.3L V8 Engine
385

If there seems to be no leak, start the engine
again. The engine cooling fan speed should
increase when idle speed is doubled by pushing
the accelerator pedal down. If it does not,
your vehicle needs service. Turn off the engine.
Notice:Engine damage from running your
engine without coolant is not covered by your
warranty.
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
Recovery Tank
If you have not found a problem yet, but the
coolant level is not at the FULL COLD mark, add
a 50/50 mixture of clean, drinkable water and
DEX-COOL
®engine coolant at the coolant
recovery tank. SeeEngine Coolant on page 379
for more information.
{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.
386

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.
When the coolant in the coolant recovery tank is
at the FULL COLD mark, start your vehicle.
If the overheat warning continues, there is one
more thing you can try. You can add the proper
coolant mixture directly to the radiator, but be sure
the cooling system is cool before you do it.
{CAUTION:
Steam and scalding liquids from a hot
cooling system can blow out and burn
you badly. They are under pressure, and if
you turn the radiator pressure cap — even
a little — they can come out at high
speed. Never turn the cap when the
cooling system, including the radiator
pressure cap, is hot. Wait for the cooling
system and radiator pressure cap to cool
if you ever have to turn the pressure cap.
387

Climate Control System
Dual Automatic......................................... 170
Outlet Adjustment..................................... 175
Rear........................................................ 176
Collision Damage Repair............................. 511
Comfort Guides, Rear Safety Belt................. 36
Compass............................................124, 126
Content Theft-Deterrent............................... 106
Control of a Vehicle..................................... 286
Convenience Net......................................... 146
Coolant
Engine Temperature Gage........................ 189
Heater, Engine......................................... 112
Cooling System........................................... 384
Cruise Control............................................. 159
Cruise Control Light.................................... 194
Customer Assistance Information
Courtesy Transportation........................... 507
Customer Assistance for Text
Telephone (TTY) Users......................... 502
Customer Assistance Offices.................... 502
Customer Satisfaction Procedure.............. 498
GM Mobility Reimbursement Program...... 503
Reporting Safety Defects to General
Motors.................................................. 516Customer Assistance Information (cont.)
Reporting Safety Defects to the
Canadian Government.......................... 516
Reporting Safety Defects to the
United States Government.................... 516
Roadside Assistance Program.................. 504
Service Publications Ordering
Information........................................... 517
D
Daytime Running Lamps............................. 163
Defensive Driving........................................ 282
Delayed Locking............................................ 98
Disc, MP3................................................... 251
Doing Your Own Service Work.................... 357
Dome Lamp Override.................................. 166
Dome Lamps............................................... 166
Door
Delayed Locking........................................ 98
Locks......................................................... 96
Power Door Locks..................................... 97
Programmable Automatic Door Locks......... 98
Rear Door Security Locks........................ 101
Driver
Position, Safety Belt................................... 24
522

Driver Information Center (DIC)................... 198
DIC Operation and Displays..................... 199
DIC Vehicle Customization....................... 208
DIC Warnings and Messages................... 202
Driving
At Night................................................... 314
City.......................................................... 319
Defensive................................................. 282
Drunken................................................... 283
Freeway................................................... 320
Hill and Mountain Roads.......................... 323
In Rain and on Wet Roads...................... 316
Off-Road.................................................. 299
Rocking Your Vehicle to Get it Out.......... 330
Winter...................................................... 325
Dual Automatic Climate Control System....... 170
DVD
Rear Seat Entertainment System............. 260
E
Electric Power Management........................ 167
Electrical System
Add-On Equipment................................... 464
Engine Compartment Fuse Block............. 465
Fuses and Circuit Breakers...................... 465
Headlamps............................................... 464Electrical System (cont.)
Power Windows and Other Power
Options................................................. 464
Rear Underseat Fuse Block..................... 471
Windshield Wiper Fuses........................... 464
Electronically Controlled Air Suspension
System.................................................... 337
Engine
Air Cleaner/Filter...................................... 374
Battery..................................................... 396
Check and Service Engine Soon Light..... 190
Coolant.................................................... 379
Coolant Heater......................................... 112
Coolant Temperature Gage...................... 189
Drive Belt Routing.................................... 492
Engine Compartment Overview ................ 366
Exhaust................................................... 122
Fan Noise................................................ 390
Oil ........................................................... 369
Oil Life System........................................ 372
Overheating............................................. 382
Reduced Power Light............................... 195
Starting.................................................... 110
Entry Lighting.............................................. 337
Event Data Recorders (EDR)...................... 337
Exit Lighting................................................ 337
Extender, Safety Belt................................... 337
523

H
Hazard Warning Flashers............................ 154
Head Restraints............................................ 15
Headlamps.................................................. 162
Automatic Headlamp System.................... 164
Bulb Replacement.................................... 404
Daytime Running Lamps.......................... 163
Electrical System..................................... 464
Flash-to-Pass........................................... 157
Halogen Bulbs......................................... 404
Headlamps, Front Turn Signal, and
Parking Lamps..................................... 405
High/Low Beam Changer......................... 157
On Reminder........................................... 163
Heated Seats.................................................. 9
Heater......................................................... 170
Highbeam On Light..................................... 195
Highway Hypnosis....................................... 322
Hill and Mountain Roads............................. 323
Hood
Checking Things Under............................ 364
Release................................................... 364
Horn............................................................ 154
How to Use This Manual................................ 4
How to Wear Safety Belts Properly............... 24
I
Ignition Positions......................................... 109
Infants and Young Children, Restraints .......... 43
In ation - Tire Pressure............................... 419
Instrument Panel
Overview.................................................. 152
Instrument Panel (I/P)
Brightness................................................ 166
Cluster..................................................... 178
J
Jump Starting.............................................. 397
K
Keyless Entry System................................... 93
Keys............................................................. 91
525