2008 DODGE RAM 5500 CHASSIS CAB immobilizer

SENTRY KEY
The Sentry Key Immobilizer 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, which 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 (2)
seconds if someone uses an invalid key to start the
engine.
NOTE:A key, which 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 Alarm Indicator Light willturn on for three (3) seconds 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 start the engine. Either of
these conditions will result in the engine being shut off
after two (2) seconds.
If the Vehicle Security Alarm Indicator Light turns on
during normal vehicle operation (vehicle running for
longer than 10 seconds), it indicates that there is a fault in
the electronics. Should this occur, have the vehicle ser-
viced as soon as possible.
NOTE:
²The Sentry Key Immobilizer System is not compatible
with some after-market remote starting systems. Use
of these systems may result in vehicle starting prob-
lems and loss of security protection.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 15
2

²Exxon/Mobil Speed Pass,Ÿ additional Sentry Keys, or
any other transponder-equipped components on the
same key chain willnotcause a key-related (transpon-
der) fault unless the additional part isphysically 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 Key is programmed to a vehicle, it cannot
be programmed to any other vehicle.
CAUTION!
Always remove Sentry Keys from 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 PIN number. Keep the PIN in a secure
location. This number is required for dealer replacement
of keys. Duplication of keys may be performed at an
authorized dealer or by using the Customer Key Pro-
gramming procedure. This procedure consists of pro-
gramming a blank key to the vehicle electronics. A blank
key is one, which has never been programmed.
NOTE: When having the Sentry Key Immobilizer
System serviced, bring all vehicle keys with you to the
dealer.
16 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

Hitches
Trailer Towing........................ 355
Hoisting.............................. 389
Hood Release.......................... 120
Hoses................................ 440
Hub Caps............................. 385
Hydraulic Clutch Fluid.................... 443
Ignition............................... 12
Key ................................. 12
Ignition Key Removal..................... 12
Illuminated Entry........................ 20
Immobilizer (Sentry Key)................... 15
Infant Restraint........................59,60
Inflation Pressure Tires.................... 333
Information Center...................... 143
Information Center, Vehicle................. 143
Inside Rearview Mirror.................... 81
Instrument Cluster....................172,174Instrument Panel and Controls.............. 171
Instrument Panel Lens Cleaning............. 461
Integrated Power Module (Fuses)............ 462
Interior Appearance Care.................. 460
Interior Lights.......................... 122
Intermittent Wipers (Delay Wipers)........... 128
Intervention Regeneration Strategy........... 422
Introduction............................. 4
Jack Location........................... 379
Jack Operation.......................... 380
Jump Starting.......................... 390
Key, Programming........................ 17
Key, Replacement........................ 16
Key, Sentry (Immobilizer)................... 15
Keyless Entry System...................... 21
Keys................................. 12
INDEX 517
10

Folding Floor......................... 163
Heated.............................. 119
Lumbar Support....................... 117
Power.............................. 117
Reclining............................ 115
Security Alarm (Theft Alarm).............19,177
Selection of Coolant (Antifreeze)..........435,476
Sentry Key (Immobilizer)................... 15
Sentry Key Programming................... 17
Sentry Key Replacement................... 16
Service Assistance....................... 500
Service Contract......................... 502
Service Information...................... 404
Service Manuals........................ 504
Setting the Clock.............184,188,196,209,222
Settings, Personal........................ 146
Shifting............................... 273
Manual Transmission................... 285
Transfer Case......................... 292Transfer Case, Shifting into Transfer Case
Neutral (N).......................370,372
Transfer Case, Shifting out of Transfer Case
Neutral (N).......................371,374
Shoulder Belt Upper Anchorage.............. 43
Shoulder Belts........................... 35
Signals, Turn........................... 126
Sliding Rear Window
Power............................34,162
Slippery Surfaces, Driving On............... 304
Snow Chains (Tire Chains)................. 333
Snow Plow............................ 365
Snow Tires............................ 334
Soot Filter............................. 422
Spare Tire............................. 329
Spark Plugs.........................420,476
Speed Control (Cruise Control).............. 132
Speedometer........................... 175
Starting............................252,255
INDEX 523
10