2008 chevrolet upland wiring

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Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=108234
Printed Date: July 12, 2025 at 4:34 AM

Topic: 2008 chevrolet upland wiring

Posted By: caddyroger
Subject: 2008 chevrolet upland wiring
Date Posted: October 18, 2008 at 5:35 PM

On a 2008 Chevy Uplander all of the wiring is 16 some 14 ga. On the wiring diagram the starter wire is yellow. The yellow goes from the ing switch to the BCM and is only 16g. How would you test this wire? Does the switch makes ground? Would this be the same for the ass and ign wie?

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Caddy

Replies:

Posted By: i am an idiot
Date Posted: October 19, 2008 at 8:01 PM

Battery	RED	(+)	AT VEHICLE BATTERY
Ignition 1	PINK	(+)	IGNITION SWITCH HARNESS
Accessory 1	BROWN	(+)	IGNITION SWITCH HARNESS
Starter 1	YELLOW	(+)	IGNITION SWITCH HARNESS
Anti-Theft Type	GM PASSKEY III® VEHICLE IMMOBILIZER
Anti-Theft Descript	THE KEY SENDS AN RF SIGNAL TO THE BCM MODULE THROUGH AN ANTENNA LOCATED AROUND THE IGNITION CYLINDER
Key Sense	LIGHT GREEN	(-)	IGNITION SWITCH HARNESS
Tachometer	TAN	(AC)	AT PCM MODULE INSIDE AIR CLEANER ASSEMBLY
Crankshaft Sensor	LIGHT BLUE/WHITE	(AC)	AT PCM MODULE UNDER AIR CLEANER UNDER HOOD
Camshaft Sensor	BROWN / WHITE	(AC)	AT PCM MODULE UNDER AIR CLEANER UNDER HOOD
Speed Sense	DARK GREEN	(AC)	RADIO HARNESS
Parking Lights	BROWN / WHITE	(-)	AT BCM MODULE TO LEFT OF STEERING COLUMN BEHIND DRIVERS SIDE OF DASH
Brake Lights	WHITE	(+)	AT BCM MODULE TO LEFT OF STEERING COLUMN BEHIND DRIVERS SIDE OF DASH
Reverse Lights	LIGHT GREEN	(+)	AT BCM MODULE TO LEFT OF STEERING COLUMN BEHIND DRIVERS SIDE OF DASH
Horn	TAN	(-)	AT BCM MODULE TO LEFT OF STEERING COLUMN BEHIND DRIVERS SIDE OF DASH

According to the info above the start wire is Positive.

Posted By: caddyroger
Date Posted: October 19, 2008 at 9:06 PM

The pink, brown and the yellow wires are 16 gage. When I connect a test light from the yellow to ground I do not show any voltage when the key is in the start prosition.

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Caddy

Posted By: i am an idiot
Date Posted: October 19, 2008 at 9:50 PM

You really do not need to be using a test light in a newer vehicle. Did the vehicle turn over when you were testing it with the test light?

Posted By: caddyroger
Date Posted: October 19, 2008 at 10:17 PM

Nothing. Maybe this week end I'll retest using my voltmeter. I wish I could find the wiring diagram for the Van. The chiltons, alldated do not have the 2008 Uplander listed.

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Caddy