Remote Start on a 2004 Chevy Impala
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=74076
Printed Date: July 13, 2025 at 8:57 PM
Topic: Remote Start on a 2004 Chevy Impala
Posted By: sparky691
Subject: Remote Start on a 2004 Chevy Impala
Date Posted: March 07, 2006 at 11:15 AM
I recently purchased and had installed a Avital AviStart 4100 remote start & keyless entry unit into my 2004 Chevy Impala. Unfotunately, the installers only installed the remote start functionality of the unit, leaving the door locks, trunk latch, and defroster functionality uninstalled. I now have two remotes that I have to carry around for the same vehicle, since the buttons on the Avital remote for the door locks and the trunk are inactive. The installer told me that I would need a serial data bus interface to add that functionality to the Avital unit, but I read on a few forums that it would be a simple "relays and resistors" installation. I've done some installing before (mostly two-way radio and cellular equipment) so I have an idea of what's involved. Can somebody steer me in the right direction as to what hookups I need to make in order for these functions to be active? Any help would be greatly appreciated. Thanks to everybody in advance.
Replies:
Posted By: xtremej
Date Posted: March 07, 2006 at 12:11 PM
If you got buldogsecurity.com you can get a scematic to hook up the keyless entry, you can use 2 relays to do this. As far as the trunk I am not sure what the trunk output is on the avital -/+, but you can switch polarity with a relay. There will be side notes to tell you how to hook this up to the relays and the to car.
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Posted By: sweezy11
Date Posted: March 07, 2006 at 12:29 PM
The outputs for lock and unlock on the avistart4100 are negative. You will need two relays and a 470 Ohm resistor to get the locks to function. The impala uses a one wire lock system. Lock is negative trigger through a 470 Ohm resistor. Unlock is a straight negative trigger. The lock/unlock wire is ORANGE / Black and is found at the BCM, gray 24 pin plug, Pin B3. I hope this helps to get you started.
Posted By: ziggyb222
Date Posted: March 07, 2006 at 4:11 PM
The eassiest module to use on this vehicle is the GM-SL from Crimestopper. Simple coonection from your remote starter and then one wire hook up to the purple wire on the OBD2 connector. I can do one of these cars in under an hour.. this module will do trunk,doors,passlock,turn on your heated seats if available. Very easy to hook up
Posted By: uffdog
Date Posted: March 08, 2006 at 7:49 PM
USe the GM-SL quick and easy hookup,no relays involved ,save yourself the headaches
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RFD
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