Start with this. Make your connection directely on to the ignition harness.
DIRECTWIRE™ WIRING INFORMATION - CHEVROLET / SILVERADO / 2003 / Security
12volts red (x2) + ignition harness
Starter yellow + ignition harness
Ignition pink + ignition harness
Power Lock use 457G or 456G module
Notes: If Directed module 457G or 456G is not available, refer to DirectFax document 1601.
On base model trucks, the 457G or 456G is not necessary. Instead, the lock wire is lt. blue (-), pin B5, and the unlock wire is white (-), pin B10. They are in the lt. blue plug at the BCM.
Power Unlock see power lock
Lock Motor gray 5wi driver door module in door
Unlock Motor tan 5wi driver door module in door
Disarm Defeat tan 5wi passenger door module in door
Parking Lights+ brown + driver kick panel
Parking Lights- gray/black - BCM, brown plug, pin B2
Notes: The BCM (Body Control Module) is under the driver side dash. It has 6 plugs in it, the purple plug is on the back.
Hazards white - steering column, 5 pin plug
Turn Signal(L) dk. green + steering column, 5 pin plug
Turn Signal(R) lt. green + steering column, 5 pin plug
Door Trigger gray/blk (L), BLACK/ wht (R) - each door module in each door
Notes: On base model trucks the door trigger wires are in the lt. blue plug at the BCM, pins B4 and A5. On 4dr trucks the LR door trigger is lt. blue/black, pin A3, and the RR is lt. GREEN/ black, pin A2. They are in the purple plug at the BCM. Use all wires and diode isolate.
The BCM (Body Control Module) is under the driver side dash. It has 6 plugs in it, the purple plug is on the back.
Dome Supervision gray/black + BCM, black plug, pin E
Notes: The BCM (Body Control Module) is under the driver side dash. It has 6 plugs in it, the purple plug is on the back.
Trunk/Hatch Pin N/A
Hood Pin N/A
Trunk/Hatch Release N/A
Power Sliding Door N/A
Factory Alarm Arm arms with lock
Factory Alarm Disarm lt. green - driver door module in door
Disarm No Unlock see factory alarm disarm
Tachometer white ac instrument cluster, pin A5 or PCM
Notes: The PCM (Powertrain Control Module) is in the left front of the engine compartment to the left of the fan shroud. The tach wire is in the green plug, pin 10.
For tach can also go to any of the ignition coils or injectors and use the wire that is NOT pink, black, or brown.
Horn Trigger BLACK / YELLOW to black - steering column
Memory Seat 1 red + driver door module in door
Memory Seat 2 pink + driver door module in door
Memory Seat 3 N/A +
Interface Module: Category:
Immobilizer Bypass Required:
Yes Type:
Passlock II
Part #: 556LW
Alternate Part1 #: 555LW
Alternate Part2 #: 555T
Notes: Not required if using the combo interface module.
The Passlock II wire colors are yellow, black, and RED / white (not used).
Interface Module: Category:
Door Lock Interface Required:
Yes Type:
Data Bus
Part #: 456G
Notes: Not required if using the combo interface module.
Interface Module: Category:
Combo Interface Required:
Yes Type:
Data Bus
Part #: 457GW
Notes:
This wiring information is being provided free of charge on an "as is" basis, without any representation or warranty. It is your responsibility to verify any circuit before interfacing with it using a digital multimeter.
Directed electronics, Inc. assumes no responsibility with regards to the accuracy or currency of this information. Proper installation in every case is and remains the responsibility of the installer. DEI assumes no liability or responsibility resulting from improper installation, even in reliance upon this information.
Be careful whose advice you buy, but be patient with those who supply it.