2003 chevy express van
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=15958
Printed Date: June 04, 2024 at 12:25 AM
Topic: 2003 chevy express van
Posted By: chuckles
Subject: 2003 chevy express van
Date Posted: July 06, 2003 at 10:27 PM
I have serched the data base and could not find the wiring details for an alarm for this van. Does anyone have any info on this van?
Thank You in advance Chuck.
Replies:
Posted By: cpgoose
Date Posted: July 08, 2003 at 11:14 AM
Here's what I found for the Chevy Express, '97-'02.
I think this is what you're looking for, but of course you should verify all of the wires yourself, just to be sure. (Sorry about the formatting below).
Chevrolet
Express
1997-2002
Start:
YELLOW
IGNITION SWITCH HARNESS *
Ignition #1:
PINK
IGNITION SWITCH HARNESS
Ignition #2:
WHITE
IGNITION SWITCH HARNESS (ECM)
Ignition #3:
N/A
Accessory:
ORANGE
IGNITION SWITCH HARNESS
Brake Light:
PURPLE
AT SWITCH ABOVE BRAKE PEDAL
Tach Signal:
WHITE
AT COIL TOP OF RIGHT CYL. HEAD
Parking Lights:
BROWN
AT HEADLAMP SWITCH
Headlights:
YELLOW
AT HEADLAMP SWITCH
OEM Alarm Disarm:
N/A
OEM Alarm Arm:
N/A
Notes:
* 1998 Vehicles Are Equipped With GM's PASSLOCK II Anti-Theft System; See Note #113 - Bypassing GM's PASSLOCK II Passive Theft System Diagram.
--------------------------------------------------------------------------------
Chevrolet
Express
1997-2002
Constant +12 Volts:
Red
IGNITION SWITCH HARNESS
Starter Kill:
YELLOW
IGNITION SWITCH HARNESS *
Ignition +12 Volts:
PINK
IGNITION SWITCH HARNESS
Dome Lights/Superv:
PURPLE (-)
AT DRIVER'S OR PASSENGER SWITCH
OEM Horn:
BLACK (-)
STEERING COL. OR DK. GREEN (+) AT HORN
Power Lock:
LIGHT BLUE
IN PASSENGER KICK PANEL ***
Power Unlock:
WHITE
IN PASSENGER KICK PANEL ***
Trunk Release:
N/A
Alarm Input Wire:
PURPLE (-)
AT DRIVER'S OR PASSENGER SWITCH
Notes:
*** See Note #202 - Positive Pulse Door Lock Diagram.
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Posted By: chuckles
Date Posted: July 09, 2003 at 3:51 PM
Thanks a lot, this will give me a starting point.
Posted By: NowYaKnow
Date Posted: July 09, 2003 at 6:17 PM
Most of that seems right, but off the top of my head the horn wire will be tan (-) @ the steering column. Also for an 03 I have a feeling the info listed above for dome lights and info for park lights are incorrect, but to be honest I can't think of what the right stuff is. I think I just grabbed the dome wire at the overhead domelight in the ceiling last time I did one of those. Either way good luck hopefully between all the info you can get it going. Later
Posted By: cpgoose
Date Posted: July 10, 2003 at 6:09 AM
Yea, sorry....I didn't realize that wiring I gave you only went up to 2002. I'll see if I run across 2003 anywhere, or maybe someone else has it. Like you said though, this is just a starting point....always check the wires with a multimeter. ------------- Q: What's the best nation in the world?
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Posted By: Velocity Motors
Date Posted: July 10, 2003 at 8:22 AM
Notes: The BCM (Body Control Module) is under the passenger side dash, behind the knee bolster. Notes: The BCM (Body Control Module) is under the passenger side dash, behind the knee bolster. | Turn Signal(L) | lt. blue/white | + | steering column | | Turn Signal(R) | dk. blue/white | + | steering column | | Reverse Light | lt. green | + | pin F, black plug at BCM |
Notes: The driver door trigger is tan in pin B4, the front passenger and rear cargo door trigger is lt. green in pin A5, and the rear doors or sliding doors trigger is yellow/black in pin A10. Use all three wires and diode isolate each. Notes: It is white on the 4.3L, and purple on the 4.8L, 5.3L, and 6.0L.
The PCM (Powertrain Control Module) is on the driver side fender. | Brake Wire | white | + | brake pedal switch | | Parking Brake | lt. blue | - | pin A7, lt blue plug at BCM |
Notes: The Passlock 2 wire colors are yellow, tan, and ORANGE / white (not used). ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: Chris Luongo
Date Posted: July 10, 2003 at 4:32 PM
I just did one of these for remote start a few hours ago. Most is the same as the 2002, but a few things are different.
-There are two BROWN / whites at the headlight switch; one of those is negative parking lights---no need to go to the BCM for it.
-The ignition and Passlock wires are all to be found at a large black plug right under the dash---it is plainly visible without even taking the dash apart.
There happen to be two yellow wires in there---The one for Passlock is near the middle of the plug, NOT the one on the edge. The tan Passlock ground wire is right near the thick brown, orange, and white ignition wires.
Also, I've never had a need to power the brown radio wire during remote start. The pink, white, and orange will do fine.
-If you go under the carpet on the driver's floor, there's a wire bundle running right in between where the driver's feet would be. There are a lot of light blue and white wires in there---ignore the larger ones. Out of all the smaller wires in there, only one of the light blues is negative unlock. A couple of the whites and another light blue are negative unlock. Both are tested off the PASSENGER lock/unlock switch.
-It would be okay to use voltage sense on this car, because it is impossible to overcrank the starter anyway.
-I found a spot right on top of the engine doghouse where I could easily lay the brain, and then I just ran the wiring to the left to meet up with the van's ignition harness.
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