Consistency of Readings
Always check the uid level at least twice using
the procedures described. Consistency (repeatable
readings) is important to maintaining proper uid
level. If uid is added, it may take 15 minutes
or longer to obtain an accurate reading because of
residual uid draining down the dipstick tube. If
inconsistent readings persist, check the
transmission breather to be sure it is clean and
not clogged. If readings are still inconsistent,
contact your dealer.
Engine Coolant
If your vehicle has the DURAMAX®Diesel engine,
see the DURAMAX®Diesel manual for more
information.
The cooling system in your vehicle is lled with
DEX-COOL
®engine coolant. This coolant is
designed to remain in your vehicle for ve years or
150,000 miles (240 000 km), whichever occurs
rst, 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, seeEngine
Overheating on page 517.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down to
−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as they
should.
Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core, or
radiator corrosion. In addition, the engine
coolant may require changing sooner, at the
rst maintenance service after each
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.
514
Visors.......................................................... 129
Voltmeter Gage........................................... 257
W
Warning Lights, Gages and Indicators......... 248
Warnings
DIC Warnings and Messages................... 281
Hazard Warning Flashers......................... 213
Other Warning Devices............................ 213
Safety and Symbols..................................... 4
Vehicle Damage.......................................... 5
Wheels
Alignment and Tire Balance..................... 576
Different Size........................................... 574
Replacement............................................ 576
Where to Put the Restraint............................ 57
Windows..................................................... 126
Manual..................................................... 126
Power...................................................... 127
Sliding Rear............................................. 128Windshield
Rainsense™ II Wipers............................. 218
Washer.................................................... 219
Washer Fluid........................................... 527
Wiper Blade Replacement........................ 551
Wiper Blades, Cleaning............................ 606
Wiper Fuses............................................ 611
Wipers..................................................... 217
Winter Driving............................................. 420
X
XM Radio Messages................................... 355
XM™ Satellite Radio Antenna System......... 373
Y
Your Vehicle and the Environment............... 625
684
