Doors, Hood and Trunk: Description and Operation
Handles, Locks, Latches and Entry Systems
Hood
The hood latch system consists of the following components:
- Hood latch
- Hood latch release handle and cable
Front Door
The front door latch system consists of the following components:
- Interior door handle
- Exterior door handle
- Door latch
- Lock cylinder
- Push button rod
- Door latch remote control
Rear Door, SuperCab
The SuperCab rear door latch system consists of the following components:
- Interior door handle
- Door latch remote control
- Remote control
- Interior door handle remote control
- Exterior door handle
Rear Door, Crew Cab
The Crew Cab rear door latch system consists of the following components:
- Interior door handle
- Exterior door handle
- Door latch
- Door latch remote control
- Push button rod
- Push button rod horizontal linkage
- Push button rod bellcrank
Tailgate
The tailgate latch system consists of the following components:
- Tailgate latches
- Tailgate latch actuating rods
- Tailgate latch release handle
- Tailgate latch remote control
- Tailgate lock cylinder
Power Lock/Unlock
The power lock/unlock feature requests all of the vehicle doors to lock or unlock upon a customer request from either door lock control switch in the vehicle. The power door locking system functions independently of ignition status or vehicle speed.
Autolock
The autolock feature locks all the doors when the following conditions are met:
- all the doors are closed
- the ignition switch is in the RUN position
- the vehicle is shifted into any gear, putting the vehicle in motion
- the vehicle attains a speed greater than 20 km/h (12 mph)
The autolock feature repeats when:
- any door is opened then closed while the ignition is still in the RUN position
- the vehicle speed is 15 km/h (9 mph) or slower
- and the vehicle then attains a speed greater than 20 km/h (12 mph)
Refer to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock Programming for programming information.
Auto-Unlock
NOTE: The doors will not auto-unlock if the vehicle has been locked using a door lock control switch, Remote Keyless Entry (RKE) transmitter, or keyless entry keypad before the driver door is opened.
The auto-unlock feature unlocks all the doors when the following conditions are met:
- the ignition switch is in the RUN position
- all the doors are closed
- the vehicle has been in motion at a speed greater than 20 km/h (12 mph)
- the vehicle then comes to a stop
- the ignition is switched to the OFF or ACC position
- the driver door is opened within 10 minutes of the ignition being switched to the OFF, LOCK or ACC position
Refer to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock Programming for programming information.
Smart Unlock
The smart unlock feature prevents the doors from locking with the key in the ignition lock cylinder. When the Body Control Module (BCM) receives a lock command from a door lock control switch only with the key in the ignition lock cylinder and one of the front doors open, the BCM commands the doors to unlock.
The vehicle can still be locked with the ignition key in the ignition cylinder by locking the doors with the push button rods, the door lock cylinder or a lock command from a Remote Keyless Entry (RKE) transmitter.
Remote Keyless Entry (RKE)
The RKE system uses an Integrated Keyhead Transmitter (IKT). The IKT incorporates both the Passive Anti-Theft System (PATS) functions and the RKE transmitter functions in a single device.
The RKE transmitter is programmed automatically during PATS programming. During PATS programming, the BCM obtains the Transmitter Identification Code (TIC) from the IKT.
The BCM accepts programming of up to 4 IKTs. In addition to the IKTs, 4 conventional keyfobs can also be programmed to the vehicle if requested by the customer. For information on programming the IKTs, refer to the key programming procedures in Anti-Theft - Passive Anti-Theft System (PATS) Key Programming. Refer to Remote Keyless Entry (RKE) Transmitter Programming Transmitter for keyfob programming information.
IKT Without Remote Start
IKT With Remote Start
The RKE transmitter carries out the following functions:
- Unlocks the driver door
- Unlocks all doors
- Locks all doors
- Activates/deactivates the panic alarm
- Commands the interior lamps on (when unlocking) and off (when locking)
- Provides a long flash of the turn signals when UNLOCK is pressed
- Remotely start the engine (if equipped with the factory installed system)
- Sounds the horn once when LOCK is pressed twice within 3 seconds, and the doors are closed
- Sounds the horn twice when LOCK is pressed twice within 3 seconds, and any door is ajar
The RKE transmitter has a normal operating range of 10 m (33 ft).
Remote Keyless Entry (RKE) Lock/Unlock Control - Unlock
The RKE feature provides lock/unlock functions independently of key position, vehicle speed, or transmission position. The RKE feature provides a stepped (if enabled) process for unlocking the doors. Upon receipt of the first request for unlocking the doors, the RKE feature requests the BCM to unlock the driver door only and provides a long flash of the turn signals. If another unlock request is received within 3 seconds of the first, the RKE feature requests the BCM to unlock all the doors. This feature can be configured to global unlock, so that all the doors unlock on the first press of the UNLOCK button. Refer to Stepped Unlock Programming Stepped Unlock Programming for programming information.
Remote Keyless Entry (RKE) Lock/Unlock Control - Lock
The RKE feature requests that all the doors be locked when the LOCK button is pressed. On any press of the LOCK button with all doors closed, the BCM provides one flash of the turn signals. If any door is ajar, no flash occurs. As soon as the last door is closed, the BCM provides the flash of the turn signals. If 2 presses of the LOCK button are received within 3 seconds, the horn chirps once and the turn signals flash twice to indicate that all the doors are closed and locked. If any door is ajar when the second lock request is received within 3 seconds of the first, the RKE transmitter feature requests the BCM to chirp the horn twice without flashing the turn signals to indicate all the doors are locked but one or more doors are ajar. When the key is in the RUN or START position, the turn signal flashes and horn chirp confirmations do not occur.
Panic Alarm
The panic alarm feature provides audible and visual alarms which are evident from the exterior of the vehicle. The panic alarm feature requests that the turn signals are flashed and the horn sounds until deactivation. The flashing of the outputs occurs simultaneously. Activation of the panic alarm is accomplished by pressing the panic button on an RKE transmitter whenever the key is in the OFF position. At all other times this feature is disabled. Deactivation of an active panic alarm is accomplished by any of the following actions:
- A second press of the RKE transmitter panic button
- The key is switched out of the OFF position
- A period of 2 minutes and 45 seconds has elapsed since the initial activation
Remote Keyless Entry (RKE) Transmitter Memory Seat
The RKE transmitter feature provides memory seat/adjustable pedals/mirrors easy entry feature. When the UNLOCK button is pressed, the driver's seat, the adjustable pedals, and the mirrors move to the desired memory position (the seat, pedal, and mirror position corresponds to the transmitter being used). This feature can be enabled/disabled. Refer to Remote Memory Activation Remote Memory Activation and Remote Memory Deactivation Remote Memory Deactivation for programming information.
Remote Start
The factory installed remote start (if equipped), is controlled by an IKT and allows the engine to be started from outside the vehicle. Refer to Starting System Description and Operation for information on the remote start feature.
Keyless Entry Keypad
The keyless entry keypad (if equipped), located on the exterior of the driver door, provides a method for the customer to access the vehicle without a key or an RKE transmitter. The keyless entry keypad feature:
- Locks all doors
- Unlocks the driver door
- Unlocks all doors
- Programs/erases the customer keypad code
- Enables/disables auto-locking
- Enables/disables auto-unlocking
- Illuminates the keypad
- Illuminates the interior lamps
The keyless entry keypad feature operates independently of ignition status, vehicle speed, or transmission position. When a keypad button is pressed, the keypad buttons illuminate to provide better visibility. If buttons 7/8 and 9/0 are pressed simultaneously or 5 seconds have elapsed since the last button press, the illumination is turned off.
Vehicles equipped with a keyless entry keypad are programmed with a factory set 5-digit entry code. This code is provided to the customer on a wallet card in the Owner's Literature package. In addition, this code is available through the use of a scan tool, and is printed on the BCM label. When entering codes, each digit must be entered within 5 seconds of the previous button press.
Anti-Scan Feature
To provide added security, the keyless entry keypad is disabled for 1 minute after pressing the button 35 times without a valid entry code being entered. The keypad flashes during this 1-minute mode with all functionality disabled except for buttons 7/8 and 9/0 still being allowed to lock the vehicle.
Anti-scan is turned off after any of the following events:
- One minute of keyless entry keypad inactivity has elapsed
- The RKE transmitter UNLOCK button is pressed
- The key is turned to the RUN position
Unlocking the Doors with the Keyless Entry Keypad System
To unlock the driver door (with stepped unlock enabled), enter either the factory set code or the personal code (each digit must be pressed within 5 seconds of the prior digit). This illuminates the interior lamps. If the stepped unlock is disabled, all of the doors unlock upon the entry of the factory set or personal code. Refer to Stepped Unlock Programming Stepped Unlock Programming for programming information.
To unlock all doors, enter either the factory set code or the personal code (driver door unlocks) and press the 3/4 button within 5 seconds.
Locking the Doors with the Keyless Entry Keypad System
It is not necessary to enter the factory set or personal code prior to locking all the doors. To lock all the doors, press the 7/8 and 9/0 buttons at the same time with the driver door closed.
Keyless Entry Keypad Memory Seat Feature
The keypad provides a memory seat feature. The feature is associated with the personal entry codes and positions the driver seat, adjustable pedals, and exterior mirrors to the memory 1 or memory 2 setting. Refer to Keyless Entry Keypad Code Programming Testing and Inspection for programming information.