Door System, Mirror System & Window System: Other Chevrolet Silverado 2500

Module Information 1

Julian Date of Build: The scan tool displays the date upon which the Body Control Module (BCM) was manufactured.

Manufacture Enable Counter (MEC): The scan tool displays the actual value or the MEC in the BCM. This information is for the assembly plant only.

Module Part Number: The scan tool displays the part number assigned to the BCM that is currently in the vehicle.

Software Design Suffix: The scan tool displays the version of the software part number in the BCM.

Software Part Number: The scan tool displays the software identification number (ID) in the BCM.

Module Information 2

Retained Accessory Power (RAP) Calibration Number: The scan tool displays the RAP calibration part number in the BCM.

Retained Accessory Power (RAP) Suffix: The scan tool displays the RAP identification number in the BCM.

Security Calibration Number: The scan tool displays the security calibration part number in the BCM.

Security Suffix: The scan tool displays the security identification number in the BCM

Data

Battery Voltage: The scan tool displays the battery system voltage.

Retained Accessory Power (RAP) Timer: The scan tool displays the seconds left before the BCM turns the RAP relay OFF. The BCM uses this feature to allow the operation of the radio and the power windows for up to 1198 seconds, approximately 20 minutes after the ignition is turned OFF. After the time has lapsed or the door is opened the BCM will open the ground circuit for the RAP relay.

Input 1

Door Handle Switch: The scan tool displays the position of the door handle. The scan tool displays ACTIVE when a door handle is raised and INACTIVE with all doors closed and the door handles at rest.

Door Lock Relay Feedback: The scan tool displays the state of the door lock relay. The scan tool displays ON when the BCM senses the door lock relay coil is energized.

Drivers Door Jamb Switch: The scan tool displays the position of the drivers door. The scan tool displays ACTIVE when the drivers door is open.

Ignition 1: The scan tool displays the position of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN or CRANK position.

Ignition 3: The scan tool displays the position of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN position only.

Ignition Power Mode: The scan tool displays the position of the ignition switch. The scan tool displays OFF, RUN, CRANK and UNKNOWN. The UNKNOWN display is when the BCM can not determine the position of the ignition switch, between the OFF and RUN positions.

Last Remote Function Actuation (RFA) Command Since Wake-Up: The scan tool displays the last RFA commanded message from the BCM. The scan tool displays NONE when the BCM awakens from asleep status without receiving a RFA module request from a programmed key fob. The scan tool displays LOCK, UNLOCK or PANIC when the BCM is awake and a command is activated from the key fob to the RFA module.

Passenger Door Unlock Input: The scan tool displays the state of the passenger door unlock relay. The scan tool displays ACTIVE when the BCM senses that the passenger door unlock relay is being energized.

Remote Function Actuation (RFA) Message Since Wake-Up: The scan tool displays the last message sent to the BCM from the remote control door lock receiver.

Retained Accessory Power (RAP) Relay Feedback: The scan tool displays the state of the RAP relay. The scan tool displays ON when the BCM activates the RAP relay.

Outputs

Door Lock Relay: The scan tool displays the commanded state of the door lock relay. The scan tool displays ON when the keyless entry transmitter LOCK button or the power lock switch is activated. The BCM allows the door lock relay coil to go to ground, locking the doors.

Driver Door Unlock Relay: The scan tool displays the commanded state of the driver door unlock relay. The scan tool displays ON when the keyless entry transmitter UNLOCK button or the power unlock switch is activated. The BCM allows the driver door unlock relay coil to go to ground, unlocking the doors.

Passenger Door Unlock Relay: The scan tool displays the commanded state of the passenger door unlock relay. The scan tool displays ON when the BCM allows the passenger door unlock relay to go to ground to UNLOCK the passenger door(s). The BCM will command this state when the UNLOCK button on the keyless entry transmitter is activated twice within 3 seconds.

Scheme 155

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to TESTING FOR INTERMITTENT & POOR CONNECTIONS .

Binding Lock Cylinders

In many cases, applying the proper lubrication can correct the following conditions

1. Binding or sticking door lock cylinders
2. Difficulty in inserting and removing the keys

For lubricating the above components, use lubricant GM P/N 12346241 or equivalent

Do not use penetrating lubricants such as GM P/N 1052949 or WD-40®. Penetrating lubricants wash out the original lubrication. Penetrating lubricants eventually evaporate, leaving little or no lubricating material. However, when using penetrating lubricants in order to thaw or in order to loosen the lock cylinder components, refer to steps 2-4 in the procedure below for the proper methods of lubrication.

Repair lock cylinders frozen in cold weather by using the following procedure

1. While carefully avoiding damage to the painted surfaces, apply heat to the cylinder with a heat gun.
2. Using a paper clip or a similar item, hold the door shutter open. Force air into the cylinders using compressed air through a blow gun attachment.
3. While holding the shutter door open, inject small amounts of a recommended lubricant into the cylinder.
4. Work the key into the cylinder repeatedly. Wipe away any excess lubrication from the key.

Scheme 156

Scheme 157

1. Remove the door trim panel. Refer to «Trim Panel Replacement - Side Access Door»(ref-176715-S23013327282005051100000) .
2. Remove the latch retaining bolts.
3. Disconnect the latch rod from the latch.

Tools Required

J 9886-01 Door Handle Clip Remover

Scheme 158

1. Open the door.
2. Remove the window crank handle using the J 9886-01 . Be sure to retain the retainer clip on the back side of the handle.

Power Window System Components

The power window system consists of the following components

1. LF power window master switch
2. RF power window switch
3. LR power window switch (4-door vehicles)
4. RR power window switch (4-door vehicles)
5. Window lockout switch (4-door vehicles)
6. Window up and window down relays in each of the passenger window switches
7. Reversible power window motors in each of the doors (circuit breaker protected)
8. PWR WDO CB 25A (fuse block) (System power for left and right windows 2-door vehicles. System power for LF and LR windows 4-door vehicles)
9. PWR WDO CB 25A (IP wiring harness junction block) (System power for RF and RR windows 4-door vehicles)

Power Window System Controls

The power window system will operate anytime the Retained Accessory Power (RAP) system is active or when the ignition switch is in the ACCY or ON position.

The LF power window master switch can control the up and down functions of all the windows in the vehicle. The passenger door power window switches can only control the up and down functions of the individual window. The power window master switch also contains a lockout switch (4 door vehicles). The lockout switch controls the power window master switch lockout signal circuit. When the lockout switch is in the OFF position, the power window master switch lockout signal circuit is complete and the passenger door power window switches function normally. When the lockout switch is in the ON position, the power window master switch lockout signal circuit is interrupted and the passenger door window switches cannot control the up and down functions of the power windows.

Door Lock System Components

The power door lock system consists of the following components

1. LF door lock switch
2. RF door lock switch
3. Rear door lock switch utilities only
4. Door lock relay
5. Door unlock relay
6. Driver door unlock relay, uplevel vehicles
7. Body Control Module (BCM)
8. Reversible door lock actuators in each of the doors
9. MIR/LOCK 3A fuse, switch supply voltage
10. DR LOCK 20A fuse, relay supply voltage
11. UNLOCK 15A fuse, unlock supply voltage
12. LOCK 15A fuse, lock supply voltage
13. UNLOCK JMPR, base vehicles

Door Lock System Controls

The power door lock system can be controlled by any of the following

1. A power door lock or unlock switch activation
2. A keyless entry transmission, uplevel vehicles
3. An automatic door lock function

Delay Locking - Utility Vehicles

This feature allows the operator to lock all the doors from the rear lock switch. The rear cargo doors have contact plates that complete the power door lock and unlock fuse supply circuits, among others, when the cargo doors are closed, and interrupt these circuits when the cargo doors are open. When a lock function occurs and the BCM senses an active state on the lift gate ajar switch signal circuit, door open, the driver and passengers doors will lock as described, and the BCM continues to monitor the lift gate ajar switch signal circuit. When the BCM senses an inactive state, door closed, the BCM will cycle the door lock relay again after approximately 5 seconds to perform another lock function, thus locking the cargo door.

Lockout Prevention

This feature prevents the locking of the driver door if the ignition key is left in the ignition lock cylinder. If a lock function occurs from any door lock switch and the BCM senses an active state on either the left front door latch signal, secondary door latch switch signal and/or the lift gate ajar switch signal circuits and the key in ignition switch signal circuit is in the yes state, the BCM will cycle the door lock relay to lock the doors and then cycle the driver door unlock relay to unlock the driver door.

Programmable Automatic Door Locks - Manual Transmission

The automatic door lock feature can be programmed to control the door lock system. The automatic door lock feature is factory programmed to have no doors lock or unlock. For detailed instructions on programming the automatic door locks, refer to VEHICLE PERSONALIZATION .

When the automatic door lock feature is programmed to control the door lock system, the BCM will lock the vehicle doors if the following inputs are true

1. Ignition 1 input is active.
2. All door jamb switch inputs are inactive.
3. Vehicle speed is greater than 24 km/h (15 mph) for 2 seconds.

This automatic door lock function will only occur once per ignition cycle unless a door jamb switch input changes state to active and back to inactive. Then the BCM will lock all doors again.

Once the automatic door lock feature has locked the doors, the BCM will the unlock all the doors once the ignition key is removed from the ignition.

Programmable Automatic Door Locks - Automatic Transmission

The automatic door lock feature can be programmed to control the door lock system. The automatic door lock feature is factory programmed to have all doors lock and unlock. For detailed instructions on programming the automatic door locks, refer to VEHICLE PERSONALIZATION .

When the automatic door lock feature is programmed to control the door lock system, the BCM will lock the vehicle doors if the following inputs are true

1. Ignition 1 input is active.
2. All door jamb switch inputs are inactive.
3. Cargo door or lift gate/lift glass ajar inputs are inactive.
4. Transmission is shifted out of park.

This automatic door lock function will only occur once per ignition cycle unless a door jamb switch input changes state to active and back to inactive. Then the BCM will lock all doors again.

Once the automatic door lock feature has locked the doors, the BCM will the unlock all the doors when the transmission is shifted into park.

Power Mirror System Components

The power mirror system consists of the following components

1. Power mirror switch
2. Selector switch
3. Left outside power mirror
4. Right outside power mirror
5. MIR/LOCK 3A fuse

Each of the outside power mirrors contains two reversible motors. The vertical motor operates the up and down directions and the horizontal motor operates the left and right directions. Each of the power mirror motors are circuit breaker protected.

Power Mirror System Controls

The power mirror switch incorporates a mirror select switch and a 4 position mirror direction switch. The mirror select switch allows the operator to select the mirror to be moved by rotating counterclockwise to the L position, left outside power mirror, or rotating clockwise to the R position, right outside power mirror. The mirror direction switch is a four position switch that allows the operator to move the selected mirror up, down, left or right.

Heated Mirror System Components

The heated mirror system consists of the following components

1. RR Defog relay
2. HVAC control module
3. Left outside power mirror
4. Right outside power mirror
5. HTD MIR 10A fuse

Heated Mirror System Controls

The heated mirror system is activated by depressing the rear window defogger switch, which is part of the HVAC control module. For further information on the rear window defogger operation, refer to REAR WINDOW DEFOGGER DESCRIPTION & OPERATION .