2003 GMC Envoy Remote Start

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=27860
Printed Date: May 09, 2025 at 6:54 PM

Topic: 2003 GMC Envoy Remote Start

Posted By: robken94
Subject: 2003 GMC Envoy Remote Start
Date Posted: March 07, 2004 at 12:51 AM

Problem: All connections have been made and system powers up ignition and gauge lights but then goes into protection mode and won't start...I am guessing it is a tach signal problem but i have double checked the connection to the white wire at ECM and all seems fine.

Oh yeah this is a cs423 with a PLXR bypass.

Replies:

Posted By: daniel2002p
Date Posted: March 07, 2004 at 6:53 AM

make sure that your bypass module is being powered up by the alarm, and theat the bypass was hooked up correctly.

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2005 Toyota Corolla S
1.8L VVT-i I-4
Always double check your wires with a DMM!!!
Do Not Use A Test Light!!!
MECP Certified Installer!
Best Buy 665 - IN IT TO WIN IT! TEAM MOBLE!

Posted By: robken94
Date Posted: March 07, 2004 at 9:43 AM

The data wire on the bypass is the only one i am unsure of....The directions show to hook to yellow wire from keyswitch which i did first, and nothing worked, but i changed it and attached it to the purple wwire at diag.

I am assuming that being powered up by the alarm means the (-) output from the RS to the (-) input on the bypass.

Posted By: robken94
Date Posted: March 07, 2004 at 10:41 AM

I thought i was pretty smart till i got wind of this---Probably should have picked a better car to get my "feet wet". I now have very little hair left.

I am looking at 3-4 yellow wires in the ign. harness and i don't know which is the passlock wire. And i can't get the cover off the ignition switch to verify.

Posted By: murraymurray
Date Posted: March 07, 2004 at 9:17 PM

Did you program the passlock module with the engine running and get verification it is programed from the LED on the module.

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murraywatchel

Posted By: robken94
Date Posted: March 07, 2004 at 9:35 PM

Yes I did, although i tried all 3 yellow wires and it verified all three, so i don't know--maybe it is a bad module. I am ordering the PLDATA tomorrow and will try that. There is probably a reason why nobody i have talked to has even heard of the PLXR....

I am still not certain on my tach wire because tach programming doesn't give me the 2 short and 2 fast flashes. there was only one white wire in the blue ecm connector and it metered at 6.9 or so AC volts with the engine running.

Posted By: sroth140
Date Posted: March 07, 2004 at 9:48 PM

for the tach wire, remove the 4 7mm bolts from the instrument cluster and grab the only white wire in that harness, its the actual tach wire that controls the tachometer on the gauges. just a tip for 99+ GM full size trucks.

and always check the connections on the passlock II bypass. what bypass are you using?

Posted By: robken94
Date Posted: March 07, 2004 at 11:41 PM

Thanks for the responses, I really appreciate it.

I was using the PLXR bypass but will be getting the PLDATA this week and trying again next weekend...hopefully that and relocating the tach wire connnection will solve the problems i have had.