you can use the 555l but all that will do is bypass the passlock. that car needs an interface to control the door locks and the facroey alarm. those wires run on what is called databus and cannot be tied in with regular voltage output from the remote starter. so in theory you can use it but will not be able to have full function of the remote starter system. now if you get the one i sent you a link to it will do all of those functions for you. here is the wire diagram i use:
DIRECTWIRE™ WIRING INFORMATION - CHEVROLET / AVALANCHE / 2003 / Remote Start
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12volts red & red/white + ignition harness
Starter yellow + ignition harness
Second Starter N/A
Ignition pink + ignition harness
Second Ignition white + ignition harness
Notes: To avoid the check engine light from coming on and possible damage to the automatic transmission, the second ignition in this vehicle MUST be powered when adding a remote start system.
Third Ignition N/A
Accessory orange + ignition harness
Second Accessory brown + ignition harness
Keysense lt. green - ignition harness
Power Lock use Directed module 457GW
Notes: If Directed module 457GW is not available, refer to DirectFax document 1601.
Power Unlock see power lock
Lock Motor gray driver door module in door
Unlock Motor tan driver door module in door
Parking Lights+ brown + driver kick panel
Parking Lights- gray/black - switch or 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
Turn Signal(L) green + steering column
Turn Signal® lt. green + steering column
Reverse Light lt. green + BCM, black plug, pin F
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.
Door Trigger see notes - see notes
Notes: The driver door trigger is gray/black at the driver door module in the door. The RF door trigger is black/white at the passenger door module in the door. 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 four wires and diode isolate each.
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 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.
Wait to start N/A
Brake Wire white + brake pedal switch
Parking Brake lt. blue - switch or BCM, lt. blu plug, pin A7
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.
Horn Trigger black/yellow to black - column or BCM, gray plug, pin B9
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.
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 #: DesignTech 20402
Alternate Part3 #: DesignTech 29402
Notes: Not required if using the combo interface module. The Passlock II wire colors are yellow, black (org/blk), and red/white (not used).
Interface Module: Category:
Combo Interface Required:
Yes Type:
Data Bus
Part #: 457GW
Notes:
warning
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.