2003 GMC Sonoma Alarm/Remote Start Wiring

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thym8scallmet

Member - Posts: 48

Joined: July 04, 2003

Location: United States

Posted: July 30, 2003 at 9:49 PM / IP Logged

I am looking for the wiring diagrams for a 2003 GMC sonoma. I would like the Stereo and alarm diagrams, but any help would be appreciated. Thanks,

T

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esmith69

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Joined: November 26, 2002

Location: United States

Posted: July 31, 2003 at 2:50 PM / IP Logged

| 12V|red |+ |ignition harness |

| DOOR TRIGGER|*2 |- |BCM *1 |

Notes:

NOTE: This vehicle has the passlock II immobilizer system that, when adding a remote start, must be interfaced with. Use PLDATA or TBKII for bypassing the Passlock System *1 The BCM is located to the right of the accelerator pedal below the radio. The plugs on the BCM face towards the drivers side. *2 Use tan for the drivers door located in pin B4 of the purple plug, orange for the passenger door located in pin B2 of the purple plug, must diode isolate these wires. *3 The PCM is located on the passenger fender. On the 2.2L the wire is in a black 80 pin plug pin 10, and on the 4.3L the wire is in a red 32 pin plug pin 20. *4 This wire will not test when using the headlight switch. This wire is triggered by the DRL system. To meter the wire, start the car with the parking brake set, when the brake is released this wire will go to ground. *5 Also found in the brown plug at the BCM on vehicles with a factory alarm.

The stereo uses the class II wiring system i think.

Ethan

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"Patience, persistence, and perspiration make an unbeatable combination for success"

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thym8scallmet

Member - Posts: 48

Joined: July 04, 2003

Location: United States

Posted: July 31, 2003 at 4:51 PM / IP Logged

Thanks for the Info. Can you please elaborate on the class II wiring system. Thanks for you help.

T

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esmith69

Gold - Posts: 1,511

Joined: November 26, 2002

Location: United States

Posted: July 31, 2003 at 10:51 PM / IP Logged

They integrate some different vehicle electronic functions into the single radio unit, and thus if you remove the radio you lose those functions. It kinda varies from vehicle to vehicle but all of them will lose the door chimes (that remind you if you left your lights on, the key is in the ignition, low fuel, etc.). Also there has been some talk about the oil change indicator light having to be reset by a dealer after an oil change, if the original factory radio is not still in the car. Not sure if that one is a rumor or not but I think it's genuine.

ANYWAYS, here's some good links about the Class II system:

http://members.shaw.ca/johnz24/howto/2kaudio.html

http://www.go2pac.com/mainpage/classII.htm

Ethan

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"Patience, persistence, and perspiration make an unbeatable combination for success"

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2003 GMC Sonoma Alarm/Remote Start Wiring

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