2001 gmc sierra remote start problem

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=93315
Printed Date: May 02, 2024 at 8:53 PM

Topic: 2001 gmc sierra remote start problem

Posted By: bisdhawks25
Subject: 2001 gmc sierra remote start problem
Date Posted: April 25, 2007 at 12:28 AM

ok, 2001 gmc sierra...just hooked up a viper 791 alarm and everything works great but i cant get the remote start to work... it tries to start, and cranks, but then shuts off right away.... i dont have my tach wire hooked up because i dont know where it goes....i have heard about the white wire, and some PURPLE / white wire, or hooking it up to one of the injector wires, but i cant find a wire anywhere that changes voltage when i rev up the engine.... - besides that, im not sure if my problem is becasue of the passlock 2 system - do i have to get a bypass?? is that why its not starting? or is it my tach? or some other wiring problem? has anybody ever hooked up a remote start and got it to work without the bypass module?? which one should i get?

thanks a lot for your help

Replies:

Posted By: jose23
Date Posted: April 25, 2007 at 3:31 AM

Yes, you need a bypass kit for the passlock 2 . Dei 555L is the one I used .

-Jose

Posted By: jose23
Date Posted: April 25, 2007 at 3:41 AM

By the way, you can grab the tach wire (you'll still need the bypass module) right behind the instrument cluster (gauges). It'll be the WHITE wire that's right next to a GREEN / WHITE one.

-Jose

Posted By: jose23
Date Posted: April 25, 2007 at 3:44 AM

and that's assuming that it's an automatic and NOT diesel...

Posted By: mlaurenza
Date Posted: April 25, 2007 at 9:22 AM

Sounds to me like a bypass problem.

Posted By: thepencil
Date Posted: April 25, 2007 at 9:42 AM

bisdhawks25,

"do i have to get a bypass?? is that why its not starting? or is it my tach? or some other wiring problem? has anybody ever hooked up a remote start and got it to work without the bypass module?? which one should i get?"

Yes, it is a combination of both. You will need a bypass. NO EXCEPTION! Get the GM SL or anything similar with a single wire connetion the vechile DATA/Diagnotic plug. That is the simplest in my opinion. Anything like these will do..

"GMC, SIERRA, 2001, Tachometer
ECM is located near the battery, down low, between the fender and the fan under the black plastic cover. On the 4.3L, the tach wire is at pin 20 in the connector labeled red. On the 4.8L, 5.3L, and 6.0L, the tach wire is located at pin 10 in the red connector."

On your mulitimeter you have to switch it over to AC measurment, not DC to measure the tach signal.

If you have a factory alarm you will also need to make connection to that as well.

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Be careful whose advice you buy, but be patient with those who supply it. posted_image

Posted By: bisdhawks25
Date Posted: April 25, 2007 at 10:41 AM

i tried the white wire behind the instrument cluster already, and it did not give me any change in reading as the rpms went up, thats why i never hooked it up.......so, is everybody thinking bypass??

Posted By: enice
Date Posted: April 25, 2007 at 10:48 AM

To measure the tach you need to change your meter to AC... go to a fuel injector plug. Its usually a two pin plug. there will be a couple of 2 pin plugs. all plugs have a wire thats the same color. example, all may have a wire thats red. The other wire would be your tach signal. It would meausre between 1V-6V but on fuel injectors it will be a lower voltage read. you must have that wire connected before remote starting. if you cant find it you can program your 791 with a bitwriter and change the setting from tach learning to voltage reading. if you dont have the bitwriter go to the manual and look for that setting and program accordingly. after doing all that try to remote start. if it remote starts then your done, if it doesnt then leave the key inside(off position) and try to remote start again. if it remote starts then you need a bypass for that vehicle.

Posted By: bisdhawks25
Date Posted: April 25, 2007 at 1:35 PM

i have 4 wires coming off of each injector....so far, it has not ever started with the key in the ignition... and other ideas?

Posted By: enice
Date Posted: April 25, 2007 at 1:37 PM

without the tach wire being connected key or no key it still will not start unless the tach is programed

Posted By: enice
Date Posted: April 25, 2007 at 1:43 PM

to make life easier just program the alarm to use voltage checking instead of engine checking.. using a bit write its fast and easy. Remeber if you think you found your tach wire then you must have your door open and the turn on the car. Hold the valet button and you will hear a click from the 791vx. That would indicate that it has programed

Posted By: jose23
Date Posted: April 25, 2007 at 1:49 PM

Trust me, that white wire behind the dash gauges IS the tach wire. Why do you keep asking if it's the bypass though? You absolutely have to bypass the Passlock2 for remote start to work. There is NO WAY around that. No matter what you do, the truck simply will NOT start if you don't bypass the Passlock2.

Posted By: bisdhawks25
Date Posted: April 26, 2007 at 12:48 PM

so, which bypass should i use?? i dont think one that requires a key will work because my truck wont start with the key in the ignition

Posted By: jose23
Date Posted: April 26, 2007 at 1:48 PM

With Passlock2, there is NO chip in the key. Everything is in the vehicle's ignition. Regarding which bypass module to get, it all depends on how easy you want the install to be and how much you want to spend. Like I said, I used the Dei 555L and eveything works great. There is one up for auction on eBay right now at a pretty good price with priority mail shipping, too (so it'll get to you pretty fast). If you're interested, just type in the following item number into the search box (on eBay): 270112868690