2008 DODGE RAM 3500 GAS tow

ONBOARD DIAGNOSTIC SYSTEM (OBD II)
Your vehicle is equipped with a sophisticated onboard
diagnostic system called OBDII. This system monitors
the performance of the emissions, engine, and automatic
transmission control systems. When these systems are
operating properly, your vehicle will provide excellent
performance and fuel economy, as well as engine emis-
sions well within current government regulations.
If any of these systems require service, the OBD II system
will turn on the Malfunction Indicator Light (MIL). It will
also store diagnostic codes and other information to
assist your service technician in making repairs. Al-
though your vehicle will usually be drivable and not
need towing, see your authorized dealer for service as
soon as possible.CAUTION!
Prolonged driving with the Malfunction Indicator
Light (MIL) on could cause further damage to the
emission control system. It could also affect fuel
economy and drivability. The vehicle must be ser-
viced before any emissions tests can be performed.
If the Malfunction Indicator Light (MIL) is flashing,
severe catalytic converter damage and power loss
will soon occur. Immediate service is required.
Loose Fuel Filler Cap Message
If the vehicle's diagnostic system determines that the fuel
filler cap in loose, improperly installed, or damaged, a
GASCAP message will be displayed in the instrument
cluster. Tighten the gas cap until a ªclickingº sound is
heard. This is an indication that the gas cap is properly
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To minimize the possibility of catalyst damage:
²Do not shut off the engine or interrupt the ignition
when the transmission is in gear and the vehicle is in
motion.
²Do not try to start the engine by pushing or towing the
vehicle.
²Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough
idling or malfunctioning operating conditions.
Emission-Related Components
Positive Crankcase Valve (PCV)
Proper operation of the crankcase ventilation system
requires that the PCV valve be free of sticking or plug-
ging from deposits. Deposits can accumulate in the PCV
valve and passages with increasing mileage. Have the
PCV valve, hoses, and passages checked for proper
operation at the intervals specified. If the valve is
plugged or sticking, replace with a new valveÐdo not
attempt to clean the old PCV valve!Check the ventila-
tion hoses for indications of damage, weepage or plug-
ging with deposits. Replace if necessary.
Maintenance-Free Battery
The top of the maintenance-free battery is permanently
sealed. You will never have to add water, nor is periodic
maintenance required.
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Windshield Wiper Blades
The rubber edges of the wiper blades and the windshield
should be cleaned periodically with a sponge or soft cloth
and a mild nonabrasive cleaner. This will remove accu-
mulations of salt or road film.
Operation of the wipers on dry glass for long periods
may cause deterioration of the wiper blades. Always use
washer fluid when using the wipers to remove salt or dirt
from a dry windshield.
Avoid using the wiper blades to remove frost or ice from
the windshield. Keep the blade rubber out of contact with
petroleum products such as engine oil, gasoline, etc.
Windshield Washers
The fluid reservoir is located under the hood and should
be checked for fluid level at regular intervals. Fill thereservoir with windshield washer solvent only (not ra-
diator antifreeze). When refilling the washer fluid reser-
voir, take some washer fluid and apply it to a cloth or
towel and wipe clean the wiper blades, this will help
blade performance.
To prevent freeze-up of your windshield washer system
in cold weather, select a solution or mixture that meets or
exceeds the temperature range of your climate. This
rating information can be found on most washer fluid
containers.
The washer fluid reservoir will hold a full gallon of fluid
when the Low Washer Fluid Light illuminates.
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²Use Moparttouch up paint on scratches as soon as
possible. Your authorized dealer has touch up paint to
match the color of your vehicle.
Wheel and Wheel Trim Care
All wheels and wheel trim, especially aluminum and
chrome plated wheels should be cleaned regularly with a
mild soap and water to prevent corrosion. To remove
heavy soil and/or excessive brake dust, use Mopart
Wheel Cleaner (05066247AB) or equivalent, or select a
nonabrasive, non-acidic cleaner. Do not use scouring
pads, steel wool, a bristle brush, or metal polishes. Only
Mopartor equivalent is recommended. Do not use oven
cleaner. Avoid automatic car washes that use acidic
solutions or harsh brushes that may damage the wheels'
protective finish.
YES EssentialstFabric Cleaning Procedure ± If
equipped
YES Essentialstseats may be cleaned in the following
manner:
²Remove as much of the stain as possible by blotting
with a clean, dry towel.
²Blot any remaining stain with a clean, damp towel.
²For tough stains, apply MopartTotal Clean or a mild
soap solution to a clean, damp cloth and remove stain.
Use a fresh, damp towel to remove soap residue.
²For grease stains, apply MopartMultipurpose cleaner
to a clean, damp cloth and remove stain. Use a fresh,
damp towel to remove soap residue.
²Do not use any solvents or protectants on Yes Essen-
tials products.
486 MAINTAINING YOUR VEHICLE

Glass Surfaces
All glass surfaces should be cleaned on a regular basis
with MopartGlass Cleaner or any commercial
household-type glass cleaner. Never use an abrasive type
cleaner. Use caution when cleaning the inside rear win-
dow equipped with electric defrosters or the right rear
quarter window equipped with the radio antenna. Do
not use scrapers or other sharp instruments which may
scratch the elements. When cleaning the rearview mirror,
spray cleaner on the towel or rag that you are using. Do
not spray cleaner directly on the mirror.
Cleaning Plastic Instrument Cluster Lenses
The lenses in front of the instruments in this vehicle are
molded in clear plastic. When cleaning the lenses, care
must be taken to avoid scratching the plastic.1. Clean with a wet soft rag. A mild soap solution may be
used, but do not use high alcohol content or abrasive
cleaners. If soap is used, wipe clean with a clean damp
rag.
2. Dry with a soft tissue.
Seat Belt Maintenance
Do not bleach, dye or clean the belts with chemical
solvents or abrasive cleaners. This will weaken the fabric.
Sun damage can also weaken the fabric.
If the belts need cleaning, use a mild soap solution or
lukewarm water. Do not remove the belts from the car to
wash them.
Replace the belts if they appear frayed or worn or if the
buckles do not work properly.
Dry with a soft tissue.
488 MAINTAINING YOUR VEHICLE

Cavity Cartridge
FuseMini
FuseDescription
9 30 Amp
PinkOff Road Module
Power
10 5 Amp
OrangeTrx-Off Rd Pkg Sen
(Gas Engine Only)
NOTE: Insert 5 amp
fuse in this cavity to
enable the TRX capa-
bility (If Equipped).
11 20 Amp
YellowIgnition Off Draw
(IOD)-Cabin Com-
partment Node
(CCN)/Radio/Under
Hood Lamp/Wireless
Control Module
(WCM)/Satellite Digi-
tal Audio Receiver
(SDARS)/Hands Free
Module (HFM)/EOMCavity Cartridge
FuseMini
FuseDescription
12 30 Amp
PinkElectric Brake
13 25 Amp
NaturalPower-Battery
RWAL/ABS Module
Feed
14 15 Amp
BluePark Lights Left
15 20 Amp
YellowTrailer Park Lights
16 15 Amp
BluePark Lights Right
17 Ð Ð
18 40 Amp
GreenABS Pump
19 30 Amp
PinkTrailer Tow Battery
Feed
490 MAINTAINING YOUR VEHICLE

Perform Maintenance Every(Where time and mileage
are listed, follow the interval that occurs first.)
Maintenance Items Miles Kilometers or Months
Change the engine oil and engine oil filter. 6,000 10 000 6
Rotate Tires. 6,000 10 000 6
Lubricate outer tie rod ends 2500/3500 (4X4) models
only.6,000 10 000 6
Lube Front Drive Shaft Fitting (2500/3500, 4x4 only). 6,000 10 000 6
If using your vehicle for any of the following: Dusty
or off-road conditions. Inspect the engine air cleaner
filter, replace if necessary.12,000 20 000 12
Inspect the brake linings, replace if necessary. 12,000 20 000 12
Inspect the front & rear axle fluid, change if using
your vehicle for police, taxi, fleet, off-road or frequent
trailer towing.18,000 30 000 18
Inspect the CV Joints. Perform the first inspection at
12,000 miles (20 000 km) or 12 months.24,000 40 000 24
MAINTENANCE SCHEDULES 517
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Perform Maintenance Every(Where time and mileage
are listed, follow the interval that occurs first.)
Maintenance Items Miles Kilometers or Months
Inspect Exhaust System. Perform the first inspection at
12,000 miles (20 000 km) or 12 months.24,000 40 000 24
Inspect the front suspension, tie rod ends and boot
seals, replace if necessary.24,000 40 000 24
Replace the engine air cleaner filter. 30,000 50 000 30
Inspect the transfer case fluid. 30,000 50 000 30
Replace the top row of spark plugs on 4.7L engines. **30,000 50 000 30
Replace the spark plugs on 3.7L and 5.7L engines.30,000 50 000 30
Change the automatic transmission fluid & filter if
using your vehicle for any of the following: police,
taxi, fleet or frequent trailer towing.60,000 100 000 60
Change the transfer case fluid if using your vehicle for
any of the following: police, taxi, fleet, off-road or fre-
quent trailer towing.60,000 100 000 60
518 MAINTENANCE SCHEDULES
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