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you need only one post... DIRECTWIRE™ WIRING INFORMATION - CHEVROLET / FULL SIZE PICKUP / 2003 / Remote Start
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12volts	red (x2)	+	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 456G
Notes: If Directed module 456G is not available, refer to DirectFax document 1601. On base model trucks the lock wire is lt. blue (-), pin B5, and unlock wire is white (-), pin B10. They are in the lt. blue plug at the BCM.
Power Unlock	see power lock
Lock Motor	gray		driver door module in door
Unlock Motor	tan		driver door module in door
Parking Lights+	do not use
Parking Lights-	gray/black	-	brn plug, pin B2 @ BCM
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)	green	+	steering column, 5 pin plug
Turn Signal(R)	lt. green	+	steering column, 5 pin plug
Reverse Light	lt. green	+	blk plug, pin F @ BCM
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	gry/blk (L), blk/wht (R)	-	each door module in 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 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	blue	-	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 wait to start wire is in the green plug, pin 36.
Brake Wire	white	+	brake pedal switch
Parking Brake	lt. blue	-	lt. blu plug, pin A7 @ BCM
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	-	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	+

Immobilizer Bypass Module:	Required: Yes	Type: Passlock 2	Part #: 555L or 555T
Notes: The Passlock 2 wire colors are yellow, black, and RED / white (not used).

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.

wiring diagram