2001 chevy silverado 1500 base model/pyth
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=130846
Printed Date: July 17, 2025 at 2:42 PM
Topic: 2001 chevy silverado 1500 base model/pyth
Posted By: bladeyamaha
Subject: 2001 chevy silverado 1500 base model/pyth
Date Posted: March 08, 2012 at 4:29 AM
I have installed (partially apparently) a Python 5704p in a 2001 Chevrolet Silverado 1500 Base Model with a V6. There is no keys with a chip in them on this truck, so no pass lock II. The starter cranks the truck and then it stops running and a security light comes on in the lcd display on the dash. Can't seem to figure it out, I have hooked up the Pink ignition wire(Ignition 1), White wire(Ignition 2) and the heat/a/c accessory wire and split the yellow starter wire too. Why won't the engine keep running? Have used a tach signal wire and the virtual tach same results.
Replies:
Posted By: bladeyamaha
Date Posted: March 08, 2012 at 4:30 AM
Is there a motor unlock wire? (Gry/blk)
https://www.the12volt.com/installbay/forum_posts.asp?tid=6211&KW=2001+chevy+silverado+remote+start
Posted By: bladeyamaha
Date Posted: March 08, 2012 at 4:32 AM
Sorry wrong color wire-tan?
Posted By: kreg357
Date Posted: March 08, 2012 at 5:38 AM
The Security Light indicates that you do indeed have the Passlock2 engine immobilizer system installed. Look for a group of 3 wires coming from the ignition switch. They will be small gauge and be Yellow, Black or ORANGE / Black and White or RED / White. This system uses a resistance value in the ignition cylinder, not a transponder chip in the key. You will need a bypass module of the old "two relays and a resistor" method to bypass the Paslock2 system.
------------- Soldering is fun!
Posted By: bladeyamaha
Date Posted: March 08, 2012 at 5:59 AM
OK, Thank You, this has been driving me crazy for 2 days, would the DEI 556uw module work?
Posted By: kreg357
Date Posted: March 08, 2012 at 5:59 AM
There are many bypass modules available for your truck. If you want inexpensive, look for the DEI 555L, 555LW, 556LW from DEI.
If you want easy, look for the iDatalink ADS TBSL PL or Fortin INT-SL or INT-SL+. If you have the relays, a Digital Multi Meter, a
nearby Radio Shack, and like to solder, here is a link to the "relays & resistor" method : https://documents.audiovox.com/700054.pdf
The Tan Motor Unlock wire you mentioned is for the power door locks and has nothing to do with engine control. ------------- Soldering is fun!
Posted By: kreg357
Date Posted: March 08, 2012 at 6:03 AM
No, the 556UW won't handle Passlock2. The 556UW is for transponder chip based systems. The Bulldog 791 bypass
would work, as it can do both.
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Soldering is fun!
Posted By: bladeyamaha
Date Posted: March 08, 2012 at 6:09 AM
Thank You once again, so the DEI 555l should work?
Posted By: kreg357
Date Posted: March 08, 2012 at 6:20 AM
Yes, the DEI 555L will do the job. Here is a link for more info and the install guide : https://www.xpresskit.com/product.aspx?productid=35------------- Soldering is fun!
Posted By: bladeyamaha
Date Posted: March 08, 2012 at 6:36 AM
Thanks, should not have trouble after I get the module now. What a relief!
Posted By: bladeyamaha
Date Posted: March 13, 2012 at 4:22 AM
Got the 555L module in yesterday late and will install today will post results, should work no problem-reading the directions the resistance wire is Yellow and the Ground wire is ORANGE / Black on the Pickups and SUVs.
Posted By: bladeyamaha
Date Posted: March 13, 2012 at 3:16 PM
OK, there are two yellow wires at the BCM, Which one?
Posted By: bladeyamaha
Date Posted: March 13, 2012 at 3:36 PM
Is it the yellow wire located (counting pins like on the python alarm) at Pin 2? Next to the Pin 4 ORANGE / black wire?
Posted By: kreg357
Date Posted: March 13, 2012 at 3:43 PM
Follow it up towards the ignition cylinder. The three Passlock2 wires should be grouped together.
------------- Soldering is fun!
Posted By: bladeyamaha
Date Posted: March 13, 2012 at 4:10 PM
Man I tried to follow it/them, but it runs into a taped up loom and goes towards the firewall and into a larger harness and gets real complicated from there, so much so I'd have to destroy a lot of looming and I'm not sure about doing that. I got a link to a page on the12volt.com
https://www.the12volt.com/installbay/forum_posts.asp?tid=63567
Posted By: kreg357
Date Posted: March 13, 2012 at 4:28 PM
Try opening up the steering column ( drop the lower half ) and locate the Passlock2 wires there, where they originate, at the ignition cylinder.
------------- Soldering is fun!
Posted By: bladeyamaha
Date Posted: March 13, 2012 at 5:44 PM
Well, I found the ignition cylinder and found the wires but I suppose I should not complain but there is not much wire to work with before they go into a bolted plug/harness, just not much wire at all, well, just figured that out, I can lengthen them all. So Thank You very much again! Looks like its going to work out after all and today too!
Posted By: bladeyamaha
Date Posted: March 13, 2012 at 5:53 PM
I'll get to it in few, just woke up and have got to be alert more, when I start.
Posted By: bladeyamaha
Date Posted: March 13, 2012 at 7:05 PM
OK, so far so good, it cranked up with a key.
Posted By: kreg357
Date Posted: March 13, 2012 at 7:24 PM
Al right! 
Make sure all the connections are well soldered and insulated. Neaten up & secure all the wires. Test it a few more times and then button it up.
------------- Soldering is fun!
Posted By: bladeyamaha
Date Posted: March 13, 2012 at 7:30 PM
OK, it started up with the remote start, YEAH!  A big THANKS! Once again.
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