REALLY NEED TO FFIGURE THIS OUT

[elboberino]

Are the power door locks Negative Trigger, Positive trigger, or reverse polarity door locks. I'm trying to install an alarm and can't figure it out. It's for a 2001 Sierra 1500. THANKS!!

[Tucson_02Silverado]

GM is usually reverse polarity. Only two wires go to the solenoids. And there should be two sets. One for the driver door and the other for all other doors.

[99-2door]

yep, only 2-wires, so reverse polarity since at least 88

[99Silver6.0]

The door locks are 3 wire positive (Positive pulse door locks). The unlock and lock wires are at the drivers side in a large brown plug at the fuse panel. The unlock wire is white and lock is light blue. What kind of alarm are you installing?

[elboberino]

Hey, thanks a ton for the responses. I am trying to help a buddy install an alarm and we can't figure out which type of trigger it is. I'm not sure about type of alarm but it's pretty cool. It has autostart, the ability to roll down the windows, and a pager-like thing that will alert you what part of your car has set off the alarm. It's like the one that JPCustoms sells. It's cool.

[99Silver6.0]

The alarm install manual should say what polarity the pulses are. It might say on the back of the brain also. Do you want me to email you an install guide for your truck?? I have one I got off eBay a while back. Helped me out a TON! I love having remote start now. I dont have the pager deal though.

[elboberino]

The instructions that came with it suck. It might as well have come with none at all. The instructions would be a huge help. my email is: [email protected] Thanks a ton!!!

[sonjaab]

NOTE: Newer GMs need a special module for auto start and door lock etc.

with most aftermarket remotes. Mostly because of the pos. ground door locks.

I found this out with my 97. Some mfrs. have GM specific remote starter

applications so they just plug in and NO cutting etc. to mess with. Others sell the module seperate but are a PIA !

 

Digging for some old threads on this and will post!................geo

 

 

EL.....You might want to try the search function here at GMTC. There are

LOTS of posts on remote starts........Search for: remote starters

[Cyclic]

If you go to the BCM (body control modual) you can hook up locks very easily there. This chart works for 2001 and 2002 GM pickups. Make sure you test the wires I listed below to verify. If this is not enough to complete your install then take it to a pro.

 

Wire-function//Color//Location-Discription//Polarity

 

Passive Anti-theft//--//PASSLOCK II //see notes

12 volts//red & red-white//ignition harness// +

ignition//pink//ignition harness// +

ignition 2// white (small gauge)// ignition harness// +

accessory//orange//ignition harness// +

starter// yellow (small gauge ) //ignition harness// +

tach// see notes*

lock// blue // BCM under column** // +

unlock // white // BCM under column** // +

doorpin // tan & blue/white*** // BCM under column*** // -

driver door latch // tan // BCM under column**** // -

factory arm // tan**** // BCM under column**** // -

factory disarm // lt. green // BCM under column****// -

brake switch // white // at brake switch // +

parklights // lt. blue // back of light switch // +

handbrake // lt. blue // back of handbrake lever // -

horn // black // at column // -

driver window up // dk blue // driver door switch // rev pol

driver window down // brown // driver door switch // rev pol

passenger win up // dk blue // passenger win switch // rev pol

passenger win down // brown // passenger win down// rev pol

headlights // white (small gauge) // back of light switch // +

dimmer // green // back of light switch// +

key sense // lt. green // ignition switch harness// -

 

 

 

Vehicle Notes:

This vehicle is equiped with GM's PASSLOCK II passive anti-theft system. Check alarm diagram before any remote start install.

*- The 4.3 V6 engine still uses a single coil on the engine, tach wire is white. On V8 engines, there is a coil for each cylinder each with a 4 pin plug. Each plug contains a black,brown, and pink as well as a fourth wire which changes color on each coil. This fourth wire can be used as your tach reference, set your remote starter for a one cylinder signal.

**- In the 24 pin plug on the far left.

***- Tan (drivers door) is in the 16 pin plug on the far right and the blue/white (passenger door) is on the 24 pin plug in the center of the module.

****- Located in the 16 pin plug on the far right. Pulse the tan wire at the same time as the lock wire to arm the factory alarm. Pulse ground to the lt green wire

to disarm the alarm.

[99Silver6.0]

I put remote start onmy truck and it was quite a beeyatch to install. The Passlock bypass module was the biggest pain! Got it done, it just took me a while.