inflation pressure Ram 2500 2015 Owner's Guide

Tire Size
The tire size on the Vehicle Certification Label represents
the actual tire size on your vehicle. Replacement tires
must be equal to the load capacity of this tire size.
Rim Size
This is the rim size that is appropriate for the tire size
listed.
Inflation Pressure
This is the cold tire inflation pressure for your vehicle for
all loading conditions up to full GAWR.
Curb Weight
The curb weight of a vehicle is defined as the total weight
of the vehicle with all fluids, including vehicle fuel, at full
capacity conditions, and with no occupants or cargo loaded
into the vehicle. The front and rear curb weight values are
determined by weighing your vehicle on a commercial
scale before any occupants or cargo are added.
Loading
The actual total weight and the weight of the front and
rear of your vehicle at the ground can best be determined
by weighing it when it is loaded and ready for operation.
The entire vehicle should first be weighed on a commer-
cial scale to insure that the GVWR has not been exceeded.
The weight on the front and rear of the vehicle should
then be determined separately to be sure that the load is
properly distributed over the front and rear axle. Weigh-
ing the vehicle may show that the GAWR of either the
front or rear axles has been exceeded but the total load is
within the specified GVWR. If so, weight must be shifted
from front to rear or rear to front as appropriate until the
specified weight limitations are met. Store the heavier
items down low and be sure that the weight is distributed
equally. Stow all loose items securely before driving.
640 STARTING AND OPERATING

WARNING!(Continued)
3. GAWR
4.
Tongue weight rating for the trailer hitch utilized.
Towing Requirements — Tires
•Do not attempt to tow a trailer while using a compact
spare tire.
• Proper tire inflation pressures are essential to the safe
and satisfactory operation of your vehicle. Refer to
“Tires – General Information” in “Starting And Oper-
ating” for proper tire inflation procedures.
• Check the trailer tires for proper tire inflation pres-
sures before trailer usage.
• Check for signs of tire wear or visible tire damage
before towing a trailer. Refer to “Tires – General
Information” in “Starting And Operating” for the
proper inspection procedure. •
When replacing tires, refer to “Tires – General Infor-
mation” in “Starting And Operating” for proper tire
replacement procedures. Replacing tires with a higher
load carrying capacity will not increase the vehicle’s
GVWR and GAWR limits.
Towing Requirements — Trailer Brakes
WARNING!
• Do not connect trailer brakes to your vehicle’s
hydraulic brake lines. It can overload your brake
system and cause it to fail. You might not have
brakes when you need them and could have an
accident.
• Towing any trailer will increase your stopping
distance. When towing you should allow for addi-
tional space between your vehicle and the vehicle
in front of you. Failure to do so could result in an
accident.
5
STARTING AND OPERATING 653

Glass Cleaning.......................... .791
Grocery Bag Retainer ...................... .242
Gross Axle Weight Rating ...................642
Gross Vehicle Weight Rating ..................641
Guide, Body Builders ........................6
GVWR ................................ .639
Hazard Driving Through Flowing, Rising, or Shallow
Standing Water ........................ .547
Hazard Warning Flasher ....................679
Headlights ............................. .806
Automatic ........................... .166
Cleaning ............................ .791
High Beam ........................... .176
High Beam/Low Beam Select Switch .........176
Passing ............................. .176
Switch .............................. .165
Head Restraints ......................... .154Heated Mirrors
...................... .139, 242
Heater ............................. .395, 400
Heater, Engine Block ...................... .451
High Beam/Low Beam Select (Dimmer) Switch . . . .176
Hill Descent Control ...................... .587
Hill Descent Control Indicator ................587
Hitches Trailer Towing ........................ .648
Hoisting ............................... .725
HomeLink® (Garage Door Opener) .............211
Hood Release ........................... .163
Hub Caps .............................. .724
Ignition .................................16
Key .............................. .12, 16
Ignition Key Removal .......................16
Illuminated Entry ..........................24
Immobilizer (Sentry Key) ....................19
Inflation Pressure Tires .....................613
10
INDEX 849

Tachometer............................. .285
Tailgate ............................... .265
Temperature Control, Automatic (ATC) ..........413
Tilt Steering Column ...................... .180
Tip Start ............................... .443
Tire and Loading Information Placard . . . .597, 598, 613
Tire Markings ........................... .591
Tires............................117, 601, 839
Aging (Life of Tires) .....................611
Air Pressure .......................... .601
Chains .............................. .613
Compact Spare ........................ .608
Dual ............................ .617, 680
General Information .....................601
High Speed .......................... .604
Inflation Pressures ...................... .602
Life of Tires ...........................611
Load Capacity ..................... .597, 598
Pressure Monitor System (TPMS) ............619Pressure Warning Light
...................285
Quality Grading ....................... .839
Radial .............................. .604
Replacement ...........................611
Rotation ............................. .616
Safety ........................... .591, 601
Sizes ............................... .592
Snow Tires ........................... .606
Spinning ............................ .610
Tread Wear Indicators ....................610
Tire Safety Information .....................591
Tongue Weight/Trailer Weight ................650
Tonneau Cover .......................... .792
Tonneau Cover Cleaning ....................792
Torque Converter Clutch .................475, 486
Tow Hooks, Emergency .....................732
Towing ............................ .641,
737
Disabled Vehicle ....................... .737
Guide .............................. .649
858 INDEX