Keyless Entry System and Remote Functions: Other Chevrolet Silverado 2500 HD

Reference Information

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Circuit/System Verification

1. Perform the RCDLR Programming and Setup procedure. Refer to «Remote Control Door Lock Receiver Programming and Setup»(ref-278020-S38752884132008012100000) .
2. Operate the vehicle within the Condition for Running the DTC and verify the DTC does not reset. NOTE: If the DTC resets, replace the RCDLR.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for RCDLR replacement, setup, and programming

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278024-S16299655452008012100000)
2. «Scan Tool Data Definitions»(ref-278024-S07074123912008012100000)

Special Tools Required

J 43241 Keyless Enter Tester

Attempt to program the keyless entry transmitter, refer to Transmitter Programming . The transmitter should program.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for RCDLR replacement, setup, and programming

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

Scan Tool Data List

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

Scan Tool Data List

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

Scan Tool Data List

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

Scan Tool Data List

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Symptoms - Remote Functions

1. Perform «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Keyless Entry System Description and Operation»(ref-278024-S30485436172008012100000) .

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

Scan Tool Data List

Special Tools Required

J 41540 Universal Home Remote Tester

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for GDO replacement, setup, and programming

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

Scan Tool Data List

Special Tools Required

J 41540 Universal Home Remote Tester

Diagnostic Aids

In circuit/system testing, in step 4, the two outer buttons of the transmitter are pressed and held in order to enter the diagnostic mode so that the transmitter can be used with the GDO tester. The transmitter will complete the following during the process

1. After 20 seconds, the LEDs will flash indicating all codes are cleared and the default settings are set.
2. After an additional 10 seconds, the LEDs will flash again indicating that the diagnostic settings are now programmed into all three buttons.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for GDO replacement, setup, and programming

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278024-S16299655452008012100000)
2. «Scan Tool Data Definitions»(ref-278024-S07074123912008012100000)

Special Tools Required

J 43241 Keyless Entry Tester

Attempt to program the keyless entry transmitter, refer to Transmitter Programming . The transmitter should program.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Transmitter Programming»(ref-278024-S04556067732008012100000) for transmitter programming
2. «Control Module References»(ref-278020-S09054666032008012100000) for RCDLR replacement, setup, and programming

Schematic Reference

Remote Function Schematics

Connector End View Reference

Remote Function Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278024-S16299655452008012100000)
2. «Scan Tool Data Definitions»(ref-278024-S07074123912008012100000)

1. Verify that RVS is enabled in the vehicle driver information center (DIC). If RVS is not enabled, use the DIC to turn on RVS functionality.
2. Verify that the keyless entry functions operate with all available keyless entry transmitters. If the keyless entry system does not function properly with all available transmitters, refer to «Keyless Entry System Inoperative»(ref-278024-S21769900742008012100000) .
3. With a scan tool, verify that no RVS Disable History is present. If RVS disable history is present, refer to the applicable subsection in which the failure occurred.
4. With a scan tool, verify that there are no Current CTD Triggers present. If a CTD trigger exists, refer to «Symptoms - Theft Deterrent»(ref-278046-S33123632892008012100000) .

Scheme 47

Keyless Entry Antenna Replacement (Regular Cab)

Scheme 48

Keyless Entry Antenna Replacement (Extended/Crew Cab)

Garage Door Opener Programming - Universal (One LED)

The GDO is programmed by using the customer's hand-held transmitter(s).

Turn the ignition OFF while programming the GDO transmitter. Follow these steps to program up to 3 channels

1. If you have previously programmed a transmitter, proceed to Step 2. Otherwise, hold down the 2 outside buttons on the GDO transmitter for approximately 20 seconds, until the light on the GDO transmitter begins to flash rapidly. Then release the buttons. This procedure erases any previous settings and initializes the memory for all 3 channels.
2. Decide which of the 3 channels you want to program to the transmitter you have.
3. Hold the end of the hand-held transmitter against the front surface of the GDO (less than 1 inch) so you can still see the light.
4. Using both hands, press the hand-held transmitter button and the desired button on the GDO transmitter. Continue to hold both buttons through Step 5.
5. Hold down the buttons on both transmitters until you see the light on the GDO transmitter flash slowly and then rapidly. The rapid flashing, which could take up to 90 seconds, indicates that the GDO transmitter has been programmed. Release the buttons on both transmitters when the light starts to flash rapidly.

Training the GDO for Rolling Code Receivers

This procedure is for training the customer's rolling code garage door openers to their GDO transmitter. The GDO must already be programmed to its hand-held transmitter. The training process below must be completed within 30 seconds or it must be repeated.

1. Locate the train button on the garage door opener receiver. Refer to the operator's manual for the garage door opener (or call 1-800-355-3515 for assistance). Follow instructions for the garage door opener in order to determine when the unit is in train mode.
2. Return to the GDO transmitter in the vehicle, and press the button that you want trained for rolling codes 3 times, for 1 second each time. If not successfully programmed, try 2-5 seconds each time.
3. Press the button used again in order to verify that the GDO transmitter has been programmed.

You may use either the hand-held transmitter or the GDO to open the garage door.

The GDO is compatible with most, but not all, types and brands of transmitters. If the GDO light does not flash rapidly after 90 seconds, there may be a compatibility conflict with the transmitter used to program the GDO. Call 1-800-355-3515 in order to address compatibility concerns.

Erasing Channels

To erase programmed channels, hold down the 2 outside buttons until the light on the GDO transmitter begins to flash. Individual channels cannot be erased, but can be reprogrammed using the Garage Door Opener Programming and the Training GDO for Rolling Code Receivers procedures.

Non-Compatible Garage Door Openers

Garage Door Opener Programming - Universal (Three LEDs)

Programming the GDO for Rolling Code Receivers

This procedure is for training the customer's rolling code garage door openers to their GDO transmitter. The training process below must be completed within 30 seconds or it must be repeated.

1. Press the two outside buttons on the GDO for one to two seconds and immediately release them.
2. Locate the train button on the garage door opener receiver. Refer to the operator's manual for the garage door opener (or call 1-866-572-2728 for assistance). Follow instructions for the garage door opener in order to determine when the unit is in train mode.
3. Return to the GDO transmitter in the vehicle, and press the button that you want trained for rolling codes 5 to 20 seconds. The LED above the button will flash slowly. When the garage door moves, release the button. The LED will then flash rapidly until programming is complete.
4. Press the button used again in order to verify that the GDO transmitter has been programmed.

You may use either the hand-held transmitter or the GDO to open the garage door.

The GDO is compatible with most, but not all, types of garage door openers. If the GDO light does not flash rapidly after 90 seconds, there may be a compatibility conflict with the garage door opener. Call 1-866-572-2728 in order to address compatibility concerns.

Programming the GDO for Fixed Code Receivers

This procedure is for training the customer's fixed code garage door openers to their GDO transmitter. To determine if the customer has a fixed code garage door opener, remove the battery cover on the manufacturer's supplied transmitter. If a row of dip switches is present, the garage door opener is then a fixed code version. The transmitter should have anywhere from 8 to 12 switches. The garage door opener receiver may also have a set of dip switches. If the number of switches on the receiver and on the transmitter do not match, use the receiver switches to program the GDO. Each dip switch may have either two or three positions. The two position switch can either be on or off. The three position switch can either be on, neutral, or off.

1. Write down the positions of the dip switches. The positions of the switches will be entered from left to right into the GDO using the three buttons.
2. Press all three buttons on the GDO for about three seconds and immediately release them. The LEDs should flash slowly, indicating that the GDO is in programming mode.
3. Enter the positions of the dip switches one at a time. If a position of a dip switch is on, press the left button on the GDO. If the position is neutral, press the middle button of the GDO. If the position is off, press the right button of the GDO. Enter all of the positions of the dip switches. The procedure must be completed in two and one half minutes.
4. Press all three buttons on the GDO until all the LEDs turn on.
5. Press the button that you want trained to control the garage door. The LED above the button will flash slowly. You will have to hold the button from 5 to 55 seconds. When the garage door moves, release the button. The LED will then flash rapidly until programming is complete.
6. Press the button used again in order to verify that the GDO transmitter has been programmed.

You may use either the hand-held transmitter or the GDO to open the garage door.

The GDO is compatible with most, but not all, types of garage door openers. If the GDO light does not flash rapidly after 90 seconds, there may be a compatibility conflict with the garage door opener. Call 1-866-572-2728 in order to address compatibility concerns.

To erase programmed channels, hold down the 2 outside buttons until the light on the GDO transmitter begins to flash. Individual channels cannot be erased, but can be reprogrammed using the Garage Door Opener Programming and the Training GDO for Rolling Code Receivers procedures.

Non-Compatible Garage Door Openers

Scheme 49

Garage Door Opener Replacement

Transmitter Programming

1. With a scan tool, access the Remote Control Door Lock Receiver Module Setup menu. Select Program Key Fobs.
2. Select Invalidate All Fobs. This will erase all learned keyless entry transmitters and prepare the RCDLR to learn transmitters.
3. Select Next Available Slot. Follow the on-screen instructions. Simultaneously hold the LOCK and UNLOCK buttons on the keyless entry transmitter to program.
4. When all the desired transmitters have been programmed, exit the vehicle and operate the transmitter functions in order to verify correct system operation.

Keyless Entry Transmitters

The keyless entry transmitter are used to lock and unlock the vehicle door and rear compartment, operate the power liftgate (if equipped), as well as open the liftglass, from a distance of up to 60 feet (18 m) away. Up to 8 transmitters may be programmed to a single vehicle.

Keyless Entry Antenna

The keyless entry antenna is used to receive radio frequency (RF) communications sent by the keyless entry transmitters. The keyless entry antenna also receives RF signals from the tire pressure monitoring (TPM) sensors located at each wheel.

The keyless entry antenna is an integral part of the vehicle windshield or rear glass, depending on application. A coax antenna lead connects the antenna to the remote control door lock receiver (RCDLR). When a transmitter button is present, the RF signal sent by the transmitter is received by the antenna and the communications are inputted to the RCDLR.

Remote Control Door Lock Receiver (RCDLR)

The remote control door lock receiver (RCDLR) is a multifunction module that operates both the keyless entry system as well as the TPM system. When an RF message is received from a keyless entry transmitter, the RCDLR interprets this signal and will request via serial data that the body control module (BCM) perform the specific function, i.e. door lock, door unlock, or power liftgate open.

Unlock Driver Door Only

Momentarily press the transmitter UNLOCK button in order to perform the following functions

1. Unlock only the driver door.
2. Illuminate the interior lamps for a determined length of time, or until the ignition is turned ON.
3. Flash the exterior lights, if enabled through the driver information center (DIC).
4. Disarm the Content Theft Deterrent (CTD) System, if equipped.
5. Deactivate the CTD system when in the alarm mode.

Lock All Doors - Active

Press the transmitter LOCK button to perform the following functions

1. Lock all vehicle doors. Immediately turn off the interior lamps.
2. Lock the liftgate.
3. Flash the exterior lights, if enabled through the driver information center (DIC).
4. Chirp the horn if the LOCK button is pressed again within 5 seconds, if enabled through the DIC.
5. Arm the Content Theft Deterrent (CTD) System, if equipped.

Liftglass Release

A single press of the transmitter liftglass release button will open the liftglass.

Power Liftgate

Press and hold the power liftgate button to perform the following functions

1. Open or close the liftgate using the power liftgate function.
2. Flash the vehicle tail lamps.
3. Sound the interior power liftgate chime.

Panic Alarm/Vehicle Locator

Momentarily press the panic alarm/vehicle locator to perform the following functions

1. Flash the turn signal lamps three times.
2. Honk the horn three times.

Press and hold the panic alarm/vehicle locator button for longer than 2 seconds to perform the following functions

1. Flash the turn signal lamps for 30 seconds.
2. Honk the horn for 30 seconds.

Remote Vehicle Start (RVS)

The remote vehicle starting feature allows engine starting from outside of the vehicle from a distance of up to 195 feet (60 m). It also activates the vehicles automatic climate control system, if equipped. If moderate or warmer outside temperatures exist, the climate control system will default to automatic temperature control and fan speed to regulate and maintain a moderate inside temperature. When the outside temperature is cold, the climate control system will start up the rear window defogger and default to the front windshield defrost mode with the heat on and the fan blower set to high. If the vehicle has heated seats, they will also turn on. Cooled seats, if equipped, are not activated during a remote start. Normal operation of the climate control system will return after the key is turned to RUN.

To operate the function, first press and release the lock button on the keyless entry transmitter, then immediately press and hold the remote vehicle start (RVS) button for 4 seconds. The vehicle park lamps will be illuminated to indicate that the engine is running. The RVS function is allowed to start the vehicle 2 times for 10-minute intervals. If the vehicle is left running it will automatically shut off after 10 minutes unless a time extension has been done. If the remote control door lock receiver (RCDLR) receives a second request for an RVS event while already operating in RVS, the first timer will expire and the second timer will start. For example, if 7 minutes after the initial RVS request, the RVS event is extended, the total time for the RVS event would be 17 minutes. To extend an RVS event, first press and release the transmitter lock button, then press and hold the RVS button. When you enter the vehicle during a remote start and the engine is still running, insert the key into the ignition, and turn the key to RUN to drive the vehicle; this will transition the vehicle to normal operation.

RVS can be deactivated by pressing the RVS button on the keyless entry transmitter, pressing the hazard switch, or by turning On the ignition, then turning it OFF. There are also other safety and security measures that will deactivate RVS, these include depressing the accelerator pedal or opening the hood. RVS may not function when DTCs are set. In these instances, the park lights will flash once when the RVS signal is received by the RCDLR, but the vehicle will not start. If the vehicle is put into valet mode, if equipped, by pressing the valet switch, RVS will also be disabled.

While in RVS mode all modules that are normally powered when the ignition is ON are active. All on-board diagnostics (OBD) II functions are also active.

The RVS feature can be turned off through the driver information center (DIC). Other RVS features may also be turned on or off via the DIC.

Enable/Disable RVS

To disable the remote vehicle start (RVS) function, perform the following steps

1. Turn ON the ignition, with the engine OFF.
2. Access the Remote Start personalization features within the driver information center (DIC).
3. Enable or disable the Remote Start feature.

The current state of RVS can be viewed through the DIC display under the Remote Start the display will read either ON or OFF.

When valet mode is enabled by pressing the valet switch (if equipped), RVS operation will be disabled.

Hood Ajar Switch

The hood switch provides status of the hood to the body control module for remote vehicle start (RVS) and content theft deterrent (CTD) functions. It is integrated into the hood latch assembly. The hood ajar switch provides 2 separate inputs to the body control module (BCM). These separate inputs allow the BCM to actively monitor for a hood ajar switch fault.

Keyless Entry Personalization

Vehicle lock/unlock functions and remote vehicle start (RVS) settings may be personalized for 2 separate drivers. For mode descriptions and programming instructions, refer to the vehicle owners manual.

Rolling Code

The Keyless Entry System uses rolling code technology. Rolling code technology prevents anyone from recording the message sent from the transmitter and using the message in order to gain entry to the vehicle. The term "rolling code" refers to the way that the Keyless Entry System sends and receives the signals. The transmitter sends the signal in a different order each time. The transmitter and the remote control door lock receiver (RCDLR) are synchronized to the appropriate order. If a programmed transmitter sends a signal that is not in the order that the RCDLR expects, then the transmitter is out of synchronization. This occurs after 256 presses of any transmitter button when it is out of range of the vehicle.

Automatic Synchronization

The keyless entry transmitters do not require a manual synchronization procedure. If needed, the transmitters automatically re-synchronize when any button on the transmitter is pressed within range of the vehicle. The transmitter will operate normally after the automatic synchronization.