Why Did The Shop Do This? 2001 Tahoe, Viper 5706, DB3

Still cleaning up wiring solder and shrink wrapped working with what I got colors dont match but gauge size does.Mr.562

As far as bypass modules go, the DB series is the designed to go with the Viper. That being said, there are other options out there. First a few questions need to be answered. Do you want a full featured bypass module like the DB3 that does more than the Passklock2 bypass function? Do you want the bypass module to be capable of D2D communications with the Viper?Soldering is fun!

Kreg357 in honesty I have no idea what the bypasses are capable of doing. My idea was to get a alarm that would be able to unlock,lock and start my truck for those cold early mornings maybe later on have window roll down and up option. Since my factory alarm controls broke and I assume it would be better to upgrade the factory the alarm.Mr.562

Knowing everything possible for your project is very important. There are no plug-n-play options for your Tahoe out there. Knowledge is power. And as you found out, good and knowledgeable installers are worth their weight in gold. For your truck there are two types of bypass modules. The basic bypass module will only handle the Passlock2 engine immobilizer system. The second class of bypass modules ( full featured ), will handle the Passlock2 plus perform other functions like handle the trucks door locks, alarm system, provide a Tach signal and the front doors status signal. According to the DB3 install guide, it can perform all those extra functions. Directed is the only company with a full featured bypass module for that year Tahoe. All other manufacturers produce basic Passlock2 bypass modules for that year. Some of these can also provide a Tach signal. What this means is that with a Passlock2 only bypass module, the Viper will have to directly interface the Tahoe to perform certain functions ( locks and alarms ) and obtain various necessary signals ( Brake, Door Status, etc ).    Making all the vehicle connections isn't too bad. Here is a link to a Pictorial to your class vehicle with most of the necessary wires shown :       https://www.the12volt.com/installbay/forum_posts.asp?tid=135786        The only wires missing are the door pin status wires for the Vipers alarm system. You have the ability to solder and make good wire connections. You will also need a Digital Multi Meter and the ability to use it. A bad connection can kill the BCM, ECM, door lock switches, etc. The Pictorial provides an example of the R/S, relays, bypass module inter-connections. While you are using a different R/S system, you can apply that info to your chosen system. Personally, for your Tahoe, I would use a Directed 451M door lock module and a Fortin INT-SL+ for the Passlock2 bypass module. You would have to hardwire the INT-SL+ to the Viper, but that is only 4 wire connections.Soldering is fun!

After the cleaning of the harness I have figure out that the reason they didnt use the db3 was that they yanked on the harness so bad that the main obd wire pin was pulled out of it. I dont mind taking my time soldering and testing but after reading on the db3 and what I went through I will look into the components you have suggested and avoid any other problems.Mr.562

I will have to order them and maybe finalize installation next week on my time off thanks for the info kreg357Mr.562

The Fortin PASSLOCK-SL2. v.2 is slightly different in the way it handles the Tahoes Passlock2 system from the INT-SL+ but less expensive. A couple more wires to connect but it should work well. The PASSLOCK-SL2. v.2 does its' job directly on the Passlock2 wires via resistance while the INT-SL+ does it through Data at the J1850 wire.Soldering is fun!

Seems like I found the correct one does time.Mr.562

Viper 5706 db3 was reflash n repin I solder all the wires electrical tape and tesa tape to finish up the job doors lock n unlock rs works only thing I didnt do was add the relay.. any reason for the relay besides using it as a kill switch?Mr.562

Looks much better! I believe the two relays are for the (-) to (+) conversion on the lock wires. The other relay might have been for the Brown ACC2 wire. I'm pretty sure that the Viper has an internal relay for Starter Kill and Anti-Grind. It uses the thick Green and Violet wires to accomplish this and a cut on the trucks Yellow Starter wire. If your lock and unlock work OK from the Viper, you don't really need the Directed 451M module. Not sure if a Fortin INT-SL-PL is the same as the Fortin INT-SL+ bypass module.Soldering is fun!