2008 DODGE RAM 3500 GAS immobilizer

SENTRY KEYT
The Sentry KeytImmobilizer System prevents unautho-
rized vehicle operation by disabling the engine. The
system does not need to be armed or activated. Operation
is automatic, regardless of whether the vehicle is locked
or unlocked.
The system uses ignition keys that have an embedded
electronic chip (transponder) to prevent unauthorized
vehicle operation. Therefore, only keys that are pro-
grammed to the vehicle can be used to start and operate
the vehicle. The system will shut the engine off in two
seconds if someone uses an invalid key to try to start the
engine.
NOTE:A key that has not been programmed is also
considered an invalid key, even if it is cut to fit the
ignition switch lock cylinder for that vehicle.
During normal operation, after turning on the ignition
switch, the Vehicle Security Light will turn on for threeseconds for a bulb check. If the light remains on after the
bulb check, it indicates that there is a problem with the
electronics. In addition, if the light begins to flash after
the bulb check, it indicates that someone used an invalid
key to try to start the engine. Either of these conditions
will result in the engine being shut off after two seconds.
If the Vehicle Security Light turns on during normal
vehicle operation (vehicle running for longer than 10
seconds), it indicates that there is a fault in the electron-
ics. Should this occur, have the vehicle serviced as soon
as possible.
NOTE:
²The Sentry KeytImmobilizer System is not compat-
ible with some aftermarket remote starting systems.
Use of these systems may result in vehicle starting
problems and loss of security protection.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 15
2

²Exxon/Mobil SpeedpassŸ, additional Sentry Keyst,
or any other transponder-equipped components on
the same key chain willnotcause a key-related
(transponder) fault unless the additional part isphysi-
cally held against the ignition keybeing used when
starting the vehicle. Cell phones, pagers, or other RF
electronics will not cause interference with this system.
All of the keys provided with your new vehicle have
been programmed to the vehicle electronics.
Replacement Keys
NOTE:Only keys that are programmed to the vehicle
electronics can be used to start and operate the vehicle.
Once a Sentry Keytis programmed to a vehicle, it cannot
be programmed to any other vehicle.
CAUTION!
Always remove the Sentry Keystfrom the vehicle
and lock all doors when leaving the vehicle
unattended.
At the time of purchase, the original owner is provided
with a four-digit Personal Identification Number (PIN).
Keep the PIN in a secure location. This number is
required for authorized dealer replacement of keys. Du-
plication of keys may be performed at an authorized
dealer or by following the customer key programming
procedure. This procedure consists of programming a
blank key to the vehicle electronics. A blank key is one
that has never been programmed.
NOTE:When having the Sentry KeytImmobilizer
System serviced, bring all vehicle keys with you to an
authorized dealer.
16 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Heated Seats........................... 131
Heater............................... 261
Heater, Engine Block..................... 282
High Beam/Low Beam Select (Dimmer) Switch . . 140
Hitches
Trailer Towing........................ 389
Hoisting.............................. 434
HomeLinkt(Garage Door Opener) Transmitter . . . 156
Hood Release.......................... 133
Hoses................................ 470
Hub Caps............................. 429
Ignition............................... 12
Key ................................. 12
Ignition Key Removal..................... 12
Illuminated Entry........................ 20
Immobilizer (Sentry Key)................... 15
Infant Restraint........................62,63
Inflation Pressure Tires.................... 357Inside Rearview Mirror.................... 86
Instrument Cluster....................194,196
Instrument Panel and Controls.............. 193
Instrument Panel Lens Cleaning............. 488
Integrated Power Module (Fuses)............ 489
Interior Appearance Care.................. 487
Interior Lights.......................... 135
Intermittent Wipers (Delay Wipers)........... 141
Introduction............................. 4
Jack Location........................... 417
Jack Operation.......................422,423
Jacking Instructions...................... 422
Jump Starting.......................... 434
Key, Programming........................ 17
Key, Replacement........................ 16
Key, Sentry (Immobilizer)................... 15
Keyless Entry System...................... 21
INDEX 539
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Safety Tips............................. 77
Satellite Radio.......................248,251
Satellite Radio Antenna................... 254
Schedule, Maintenance.................... 514
Seat Belt Maintenance.................... 488
Seat Belt Reminder....................... 46
Seat Belts..........................34,35,79
Adjustable Upper Shoulder Anchorage........ 43
And Pregnant Women................... 47
Child Restraint.......................62,75
Extender............................. 47
Front Seat............................ 35
Pretensioners.......................... 45
Reminder............................ 197
Seats.............................. 117,118
Adjustment.......................... 117
Child............................... 75
Cleaning............................ 486
Folding Floor......................... 179Heated............................. 131
Lumbar Support....................... 122
Power...........................122,124
Rear Folding.......................126,128
Reclining......................... 119,120
Reclining Rear........................ 126
Security Alarm (Theft Alarm).............19,199
Selection of Coolant (Antifreeze)..........466,510
Sentry Key (Immobilizer)................... 15
Sentry Key Programming................... 17
Sentry Key Replacement................... 16
Service Assistance....................... 523
Service Contract......................... 525
Service Manuals........................ 527
Setting the Clock.............209,213,221,234,248
Shift Speeds........................... 291
Shifting............................... 282
Automatic Transmission................. 283
Manual Transmission.................288,291
INDEX 545
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