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CAUTION!(Continued)
•Your vehicle has been built with improved fluids
that protect the performance and durability of your
vehicle and also allow extended maintenance inter-
vals. Do not use chemical flushes in these compo-
nents as the chemicals can damage your engine,
transmission, power steering or air conditioning.
Such damage is not covered by the New Vehicle
Limited Warranty. If a flush is needed because of
component malfunction, use only the specified
fluid for the flushing procedure.
Engine Oil
Checking Oil Level
To assure proper lubrication of your vehicle’s engine, the
engine oil must be maintained at the correct level. Check
the oil level at regular intervals, such as every fuel stop. The best time to check the engine oil level is about five
minutes after a fully warmed up engine is shut off.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Always
maintain the oil level within the SAFE zone on the
dipstick. Adding one quart of oil when the reading is at
the bottom of the SAFE zone will result in a reading at the
top of the safe zone on these engines.
CAUTION!
Overfilling or underfilling the crankcase will cause
oil aeration or loss of oil pressure. This could damage
your engine.
7
MAINTAINING YOUR VEHICLE 637
Page 641 of 734

Engine Oil Viscosity
SAE 5W-20 engine oil is recommended for all operating
temperatures. This engine oil improves low temperature
starting and vehicle fuel economy. The engine oil filler
cap also shows the recommended engine oil viscosity for
your engine. For information on engine oil filler cap
location, refer to “Engine Compartment” in “Maintaining
Your Vehicle” for further information.
NOTE:Vehicles equipped with a 5.7L engine must use
SAE 5W-20 oil. Failure to do so may result in improper
operation of the Multi-Displacement System (MDS). Re-
fer to “Multi-Displacement System” in “Starting and
Operating” for further information.
Lubricants which do not have both the engine oil certi-
fication mark and the correct SAE viscosity grade num-
ber should not be used. NOTE:
For 2500/3500 trucks with a 5.7L engine operat-
ing under a gross combined weight rating of 14,000 lbs (6
350 kg) or greater, SAE 5W-30 engine oil is recommended
for all operating temperatures.
Synthetic Engine Oils
You may use synthetic engine oils provided the recom-
mended oil quality requirements are met, and the recom-
mended maintenance intervals for oil and filter changes
are followed.
Disposing Of Used Engine Oil And Oil Filters
Care should be taken in disposing of used engine oil and
oil filters from your vehicle. Used oil and oil filters,
indiscriminately discarded, can present a problem to the
environment. Contact your authorized dealer, service
station or governmental agency for advice on how and
where used oil and oil filters can be safely discarded in
your area.
7
MAINTAINING YOUR VEHICLE 639
Page 648 of 734

exhaust system inspected each time the vehicle is raised
for lubrication or oil change. Replace as required.
WARNING!
•Exhaust gases can injure or kill. They contain
carbon monoxide (CO), which is colorless and
odorless. Breathing it can make you unconscious
and can eventually poison you. To avoid breathing
CO, refer to “Safety Tips/Exhaust Gas” in “Things
To Know Before Starting Your Vehicle” for further
information.
• A hot exhaust system can start a fire if you park
over materials that can burn. Such materials might
be grass or leaves coming into contact with your
exhaust system. Do not park or operate your ve-
hicle in areas where your exhaust system can con-
tact anything that can burn.
CAUTION!
• The catalytic converter requires the use of un-
leaded fuel only. Leaded gasoline will destroy the
effectiveness of the catalyst as an emissions control
device and may seriously reduce engine perfor-
mance and cause serious damage to the engine.
• Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition.
In the event of engine malfunction, particularly
involving engine misfire or other apparent loss of
performance, have your vehicle serviced promptly.
Continued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
646 MAINTAINING YOUR VEHICLE
Page 672 of 734
Cavity Car-tridgeFuse Micro
Fuse Description
F08 30 Amp Pink Emissions Diesel –
If Equipped
F09 40 Amp Green Diesel Fuel Heater
– If Equipped
F10 40 Amp Green Body Controller /
Exterior Lighting #2
F10 50 Amp Red Body Controller /
Exterior Lighting #2 – If Equipped with Stop/Start
F11 30 Amp Pink Integrated Trailer
Brake Module – If EquippedCavity Car- tridgeFuse Micro
Fuse Description
F12 40 Amp Green Body Controller #3
/ Interior Lights
F13 40 Amp Green Blower Motor
F14 40 Amp Green Body Controller #4
/ Power Locks
F15 30 Amp Pink Electric Park Brake
Right Side – If Equipped
F19 30 Amp Pink SCR – If Equipped
F20 30 Amp Pink Passenger Door
Module
670 MAINTAINING YOUR VEHICLE
Page 674 of 734
Cavity Car-tridgeFuse Micro
Fuse Description
F33 20 Amp Yellow Diesel Fuel Heater
#1 – If Equipped / Rear Blower – If Equipped
F34 30 Amp Pink Vehicle System In-
terface Module #2 – If Equipped
F35 30 Amp Pink Sunroof – If
Equipped
F36 30 Amp Pink Rear Defroster– If
Equipped
F37 30 Amp Pink Diesel Fuel Heater
#2 if equippedCavity Car- tridgeFuse Micro
Fuse Description
F38 30 Amp Pink Power Inverter
115V AC– IfEquipped
F39 30 Amp Pink Vehicle System In-
terface Module #1– If Equipped
F41 10 Amp
Red Active Grill Shutter
F42 20 Amp
Yellow Horn
F43 10 Amp
Red Snow Plow (Left) –
If Equipped
F44 10 Amp
Red Diagnostic Port
672 MAINTAINING YOUR VEHICLE
Page 676 of 734
Cavity Car-tridgeFuse Micro
Fuse Description
F58
20 Amp Yellow
(Gas En- gine) /
25 Amp Natural (Diesel
Engine)Engine Cooling Pump
F60 15 Amp
Blue Underhood Lamp
F61 20 Amp
Yellow Power Take-off
Unit – If Equipped
F62 10 Amp
Red Air Conditioning
Clutch
Cavity Car- tridgeFuse Micro
Fuse Description
F63 20 Amp
Yellow
IgnitionCoils (Gas),
Urea Heater (Diesel)
F64 25 Amp
Natural Fuel Injectors /
Powertrain
F65 10 Amp
Red USB interface
F66 10 Amp
Red Sunroof / Passen-
ger Window
Switches / Rain Sensor
F67 10 Amp
Red CD / DVD /
Bluetooth Hands- free Module – If Equipped
674 MAINTAINING YOUR VEHICLE
Page 677 of 734
Cavity Car-tridgeFuse Micro
Fuse Description
F69 15 Amp
Blue Mod SCR 12V – If
Equipped
F70 30 Amp
Green Fuel Pump Motor
F71 25 Amp
Natural Amplifier
F72 10 Amp
Red Voltage Stabilizer
Modules – IfEquippedCavity Car- tridgeFuse Micro
Fuse Description
F74 20 Amp
Yellow (Gas
Engine) /10
Amp Red
(Diesel
Engine) Brake Vacuum
Pump Gas/Diesel – If Equipped
F75 10 Amp
Red Coolant Tempera-
ture Valve Actuator
F76 10 Amp
Red Antilock Brakes/
Electronic Stability Control
7
MAINTAINING YOUR VEHICLE 675
Page 691 of 734
FLUID CAPACITIES
U.S.Metric
Fuel (Approximate)
1500 Regular Cab Shortbed/Crew Quad Cab Models 26 Gallons98 Liters
1500 Regular Cab Longbed/Crew Quad Cab Models (Optional) 32 Gallons 121 Liters
2500/3500 Shortbed Models 34 Gallons129 Liters
2500/3500 Longbed Models 35 Gallons132 Liters
Engine Oil With Filter
3.6L Engine (We recommend you use SAE 5W-20, API Certified) 6 Quarts5.6 Liters
4.7L Engine (We recommend you use SAE 5W-20, API Certified) 6 Quarts5.6 Liters
5.7L Engine (We recommend you use SAE 5W-20, API Certified) 7 Quarts6.6 Liters
5.7L Engine (We recommend you use SAE 5W-30, API Certified).
For 2500/3500 trucks operating under a gross combined weight
rating greater than 14,000 lbs (6 350 kg). 7 Quarts
6.6 Liters
7
MAINTAINING YOUR VEHICLE 689