Service............................................................5-3
Doing Your Own Service Work.........................5-4
Two Safety Cautions about Engine Fan
Breakage...................................................5-5
Fuel................................................................5-6
Gasoline Octane............................................5-6
Gasoline Specifications....................................5-6
Additives.......................................................5-6
Diesel Engine Fuel.........................................5-7
What Fuel to Use...........................................5-8
Very Cold Weather Operation.........................5-10
Water in Fuel...............................................5-10
Running Out of Fuel.....................................5-15
Fuel Filter Replacement.................................5-16
Fuels in Foreign Countries.............................5-17
Filling the Tank............................................5-18
Filling a Portable Fuel Container.....................5-19
Checking Things Under the Hood....................5-20
Hood Latches...............................................5-20
Engine Oil (Caterpillar
®Diesel Engine).............5-22
Engine Oil (DURAMAX®Diesel)......................5-22
Engine Oil (Gasoline Engine)..........................5-26
Engine Oil Life System (Gasoline Engine)........5-29
Engine Oil Life System (DURAMAX
®Diesel).....5-31
Engine Oil Life System (Caterpillar®
Diesel Engine)..........................................5-32Engine Air Cleaner/Filter................................5-33
Automatic Transmission Fluid.........................5-34
Manual Transmission Fluid.............................5-35
Engine Coolant (Gas and
DURAMAX
®Engines).................................5-36
Engine Coolant (Caterpillar®Diesel Engines).....5-38
Coolant Surge Tank Pressure Cap..................5-38
Engine Overheating.......................................5-38
Cooling System (Gas and
DURAMAX
®Engines).................................5-40
Engine Fan Noise.........................................5-45
Power Steering Fluid.....................................5-45
Windshield Washer Fluid................................5-46
Brakes........................................................5-47
Battery........................................................5-55
Jump Starting...............................................5-56
Rear Axle.......................................................5-60
Rear Axle Shift Motor....................................5-62
Four-Wheel Drive............................................5-62
Front Axle......................................................5-63
Noise Control System.....................................5-64
Tampering with Noise Control System
Prohibited.................................................5-64
Bulb Replacement..........................................5-65
Windshield Wiper Blade Replacement..............5-65
Section 5 Service and Appearance Care
5-1
Battery
Your vehicle has one or more maintenance free
batteries. When it is time for a new battery, be sure it
has the replacement number shown on the original
battery’s label. We recommend an ACDelco
®
replacement battery.
Warning:Battery posts, terminals, and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.
Vehicle Storage
If you are not going to drive your vehicle for 25 days or
more, remove the black, negative (−) cable from the
battery. This will help keep your battery from running
down. (If your vehicle has more than one battery,
be sure to remove the negative (−) battery cable from
each battery.)
{CAUTION:
Batteries have acid that can burn you and gas
that can explode. You can be badly hurt if you
are not careful. SeeJump Starting on
page 5-56for tips on working around a battery
without getting hurt.
When you are ready to use the vehicle again, refer to
the engine starting procedure in the Index.
5-55
Jump Starting
If your battery (or batteries) has run down, you may
want to use another vehicle and some jumper cables to
start your vehicle. Be sure to use the following steps
to do it safely.
{CAUTION:
Batteries can hurt you. They can be dangerous
because:
They contain acid that can burn you.
They contain gas that can explode
or ignite.
They contain enough electricity to
burn you.
If you do not follow these steps exactly, some
or all of these things can hurt you.Notice:Ignoring these steps could result in costly
damage to your vehicle that would not be covered
by your warranty.
Trying to start your vehicle by pushing or pulling it
will not work, and it could damage your vehicle.
1. Check the other vehicle. It must have a
12-volt battery (or batteries) with a negative
ground system.
Notice:If the other vehicle’s system is not a 12-volt
system with a negative ground, both vehicles can
be damaged. Only use vehicles with 12-volt systems
with negative grounds to jump start your vehicle.
If you have a diesel engine vehicle with
two batteries (or more), you should know before
you begin that, especially in cold weather, you may
not be able to get enough power from a single
battery in another vehicle to start your diesel engine.
If your vehicle has more than one battery, use the
one closest to the starter — this will reduce electrical
resistance.
5-56
2. Get the vehicles close enough so the jumper cables
can reach, but be sure the vehicles are not touching
each other. If they are, it could cause a ground
connection you do not want. You would not be able
to start your vehicle, and the bad grounding
could damage the electrical systems.
To avoid the possibility of the vehicles rolling, set the
parking brake firmly on both vehicles involved in the
jump start procedure. Put an automatic transmission
in PARK (P) or a manual transmission in NEUTRAL
before setting the parking brake. If you have a
four-wheel-drive vehicle, be sure the transfer case is
in a drive gear, not in NEUTRAL.
Notice:If you leave your radio or other accessories
on during the jump starting procedure, they could
be damaged. The repairs would not be covered
by your warranty. Always turn off your radio and
other accessories when jump starting your vehicle.
3. Turn off the ignition on both vehicles. Unplug
unnecessary accessories plugged into the cigarette
lighter or accessory power outlets. Turn off the
radio and all lamps that are not needed. This will
avoid sparks and help save both batteries, and
it could save the radio!4. Open the hood on the other vehicle and locate the
positive (+) and the negative (−) terminal locations
on that vehicle.
Open the hood on your
vehicle and find the remote
positive (+) terminal,
located under a red plastic
cover on the passenger’s
side of the vehicle.
Squeeze the tab to open
the cover and access
the remote positive (+)
terminal.
You will not see the battery (or batteries) of your
vehicle under the hood. They are located in a frame
mounted battery box, which is located on either
the driver’s or the passenger’s side of the vehicle.
You will not need to access your battery (or
batteries) for jump starting. The remote positive (+)
terminal is for that purpose.
5-57
J
Jump Starting.................................................5-56
K
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
L
Lamps
Dome........................................................3-16
Exterior......................................................3-14
Marker.......................................................3-16
Reading.....................................................3-17
Light
Airbag Off..................................................3-28
Airbag Readiness........................................3-27
Anti-Lock Brake System Warning...................3-34
Brake System Warning.................................3-31
Change Engine Oil......................................3-38
Charging System.........................................3-30
Check Gages Warning.................................3-42
Daytime Running Lamps Indicator..................3-41
Differential Lock Indicator..............................3-40Light (cont.)
Engine Overspeed Warning...........................3-39
Engine Shutdown Warning............................3-39
Exhaust Brake Indicator................................3-40
Highbeam On.............................................3-41
Low Coolant Warning...................................3-35
Low Oil Level.............................................3-38
Low Washer Fluid Warning...........................3-42
Malfunction Indicator....................................3-36
Range Inhibit Warning Indicator.....................3-31
Reduced Engine Power................................3-41
Safety Belt Reminder...................................3-27
Safety Belt Reminder Tone...........................3-27
Service Transmission Warning.......................3-31
Trailer Anti-Lock Brake System Warning..........3-34
Wait to Start Indicator..................................3-36
Water in Fuel Warning.................................3-43
Lighting
Entry.........................................................3-17
Loading Your Vehicle.......................................4-32
Locks
Door........................................................... 2-6
Power Door.................................................. 2-7
Loss of Control...............................................4-15
Low Coolant Warning Light..............................3-35
Low Washer Fluid Warning Light.......................3-42
8