2008 DODGE RAM 3500 GAS fuel cap

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
MAINTAINING YOUR VEHICLE 447
7

Change Engine Oil
Follow the Maintenance Schedule for recommended en-
gine oil change intervals.
Engine Oil Selection
For best performance and maximum protection under all
types of operating conditions, the manufacturer only
recommends engine oils that are API-certified and meet
the requirements of DaimlerChrysler Material Standard
MS-6395.
American Petroleum Institute (API) Engine Oil
Identification Symbol
This symbol means that the oil has
been certified by the American
Petroleum Institute (API). The
manufacturer only recommends
API-Certified engine oils.
Engine Oil Viscosity (SAE Grade)
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 the ªEngine Compartmentº illustration
in this section.
452 MAINTAINING YOUR VEHICLE

FLUIDS AND CAPACITIES
U.S. Metric
Fuel (Approximate)
1500 Shortbed Models 26 gal 98 L
1500 Longbed Models 35 gal 132 L
1500 Shortbed Models 34 gal 128 L
2500 Shortbed Models 34 gal 128 L
2500 Longbed Models 35 gal 132 L
3500 Shortbed Models 34 gal 128 L
3500 Longbed Models 35 gal 132 L
508 MAINTAINING YOUR VEHICLE

Pressure Cap......................... 468
Radiator Cap......................... 468
Selection of Coolant (Antifreeze)......466,508,510
Temperature Gauge..................... 198
Cruise Control (Speed Control).............. 145
Cupholders............................ 169
Customer Assistance..................... 523
Data Recorder, Event...................... 60
Daytime Running Lights................... 137
Dealer Service.......................... 450
Defroster, Rear Window.................89,182
Defroster, Windshield................79,260,263
Delay (Intermittent) Wipers................. 141
Differential, Limited-Slip.................. 313
Dipsticks
Automatic Transmission................. 477
Power Steering........................ 460
Disc Brakes............................ 471Disposal
Antifreeze (Engine Coolant)............... 469
Door Locks............................. 27
Door Opener, Garage..................... 156
Drive Belts............................ 454
Drive Shaft Universal Joints................ 461
Driving
Through Flowing, Rising, or Shallow Standing
Water................................ 315
Dual Rear Wheels.....................361,431
DVD Player (Video Entertainment SystemŸ).... 251
E-85 Fuel............................. 377
Electric Rear Window Defrost.............89,182
Electrical Power Outlets................... 166
Electronic Brake Control System............. 324
Anti-Lock Brake System................. 325
Brake Assist System.................... 326
Electronic Roll Mitigation................ 332
INDEX 535
10

Electronic Stability Program............... 333
Traction Control System................. 326
Electronic Roll Mitigation (ERM)............. 332
Electronic Speed Control (Cruise Control)...... 145
Electronic Stability Program (ESP).........204,333
Electronically Shifted Transfer Case........298,306
Emergency Brake........................ 318
Emergency, In Case of
Freeing Vehicle When Stuck............... 437
Hazard Warning Flasher................. 416
Jacking............................. 423
Jump Starting......................... 434
Tow Hooks.......................... 438
Towing............................. 439
Emission Control System Maintenance......... 514
Emission Related Components.............. 457
Engine..........................444,445,446
Air Cleaner.......................... 455
Block Heater......................... 282Break-In Recommendations................ 76
Compartment Identification.........444,445,446
Coolant (Antifreeze).................... 510
Exhaust Gas Caution.................... 375
Flooded, Starting...................... 280
Fuel Requirements..................... 508
Multi-Displacement..................... 338
Oil ...........................451,508,510
Oil Filler Cap......................... 452
Oil Selection.......................452,508
Oil Synthetic......................... 453
Temperature Gauge..................... 198
Equipment Identification Plate.............. 413
Event Data Recorder...................... 60
Exhaust Gas Caution..............78,187,375,465
Exhaust System....................78,464,465
Exterior Lighting........................ 136
Fabric Care............................ 486
536 INDEX

Filters
Air Cleaner........................455,481
Engine Fuel.......................... 455
Engine Oil........................454,510
Engine Oil Disposal.................... 453
Flashers
Turn Signal.......................... 139
Flat Tire Stowage.....................422,433
Flexible Fuel Vehicles
Cruising Range........................ 380
Engine Oil........................... 380
Fuel Requirements..................377,379
Replacement Parts..................... 381
Starting............................. 380
Flooded Engine Starting................... 280
Fluid, Brake............................ 511
Fluid Capacities......................... 508
Fluid Level Checks
Automatic Transmission................. 477Brake............................... 472
Power Steering........................ 460
Fluids, Lubricants and Genuine Parts.......... 510
Fog Lights.......................138,201,498
Fold Flat Load Floor..................... 179
Four Wheel Drive....................... 294
Four-Way Hazard Flasher.................. 416
Freeing A Stuck Vehicle................... 437
Front Axle (Differential)................... 474
Front Wheel Bearings..................... 479
Fuel................................. 371
Adding............................. 375
Filler Cap (Gas Cap).................... 377
Filter............................... 455
Gauge.............................. 207
Hoses.............................. 471
Octane Rating......................371,510
Requirements......................371,508
System Hoses......................... 471
INDEX 537
10

Tank Capacity........................ 508
Fuel, Flexible.............See Flexible Fuel Vehicles
Fuses................................ 489
Garage Door Opener (HomeLinkt) ........... 156
Gas Cap (Fuel Filler Cap)...............377,447
Gasoline (Fuel)......................... 371
Gasoline, Reformulated................... 372
Gauges............................... 196
Coolant Temperature.................... 198
Fuel................................ 207
Oil Pressure.......................... 197
Speedometer......................... 197
Tachometer.......................... 196
Voltmeter............................ 196
Gear Ranges........................283,290
General Information.................18,117,371
Glass Cleaning.......................... 488
Grocery Bag Retainer..................... 178Gross Axle Weight Rating.................. 386
Gross Vehicle Weight Rating................ 385
Guide, Body Builders...................... 6
GVWR............................... 381
Hands-Free Phone (UConnectt) .............. 91
Hazard
Driving Through Flowing, Rising, or Shallow
Standing Water......................... 315
Hazard Warning Flasher................... 416
Head Restraints......................... 121
Headlights............................ 495
Cleaning............................ 487
High Beam........................... 140
High Beam/Low Beam Select Switch........ 140
Lights On Reminder.................... 138
Passing............................. 140
Switch.............................. 136
Heated Mirrors.......................89,182
538 INDEX

Outside.............................. 87
Rearview............................. 86
Trailer Towing......................89,400
Modifications/Alterations, Vehicle............. 7
Monitor, Tire Pressure System............... 362
Mopar Parts.........................449,526
Multi-Displacement Engine System........... 338
Multi-Function Control Lever............... 139
Navigation Radio........................ 248
Navigation System....................... 248
Noise Control
Maintenance.......................... 480
Tampering Prohibited................480,481
Noise Emission Warranty.................. 482
Occupant Restraints....................... 34
Octane Rating, Gasoline (Fuel).............. 371
Odometer..........................199,207Trip .............................199,207
Off-Pavement Driving (Off-Road)............ 317
Off-Road Driving (Off-Pavement)............ 317
Oil Change Indicator..................... 200
Oil Change Indicator, Reset................. 200
Oil, Engine.........................451,510
Capacity............................ 508
Change Interval....................... 452
Dipstick............................. 451
Disposal............................ 453
Filter............................454,510
Filter Disposal........................ 453
Identification Logo..................... 452
Materials Added to..................... 453
Pressure Gauge....................... 197
Recommendation...................452,508
Synthetic............................ 453
Viscosity..........................452,508
Onboard Diagnostic System..............447,448
542 INDEX