2001 Chevrolet Silverado, GMDLBP Bypass And 451M Module?

Are there any pictorials for a GMDLBP bypass module and 451m module. My bypass module didn't come with any instructions and I can't fine anything for a 2001 silverado. From what I've been told the 2001 silverado has positive door triggers so the 451 modules would be needed. Also will the door triggers still need to be diode isolated with the 451 module. Thanks for your help.Tory209

Here is a Pictorial on your truck : https://www.the12volt.com/installbay/forum_posts.asp?tid=135786 It will provide info on the 451M door lock module. Probably just a nomenclature thing but the truck has Positive ( Type A ) Door locks and needs the 451M to convert the R/S's (-) Door Lock actuator outputs. No diode isolation is needed for door lock control. Door Triggers are the signals from the truck that supply the door open/closed status. Here is a link to the GMDLBP Install Guide : https://directechs.blob.core.windows.net/documents/1646_gmdlbp_h02_s05_d01_i_en.pdf Please note that the bypass module does not show that it is compatible with the 2001 Silverado. Your truck needs a basic Passlock2 bypass module.Soldering is fun!

Thanks for your response. Would the basic passlock II bypass be the 791Tory209

The Bulldog Security 791 module will handle the Passlock2 and if price is a major consideration, probably the least expensive. There are better / easier modules available, but they will cost a bit more. I usually go with a Data style module like the Fortin INT-SL+ or one of the older, out of production modules from iDatalink like the ADS-TBSL-PL. Most other bypass modules require special Flash/Programming prior to use.Soldering is fun!

Thanks again. I did notice in the GMDLBP instructions that it does not provide door unlock for Passlock 2. Could it just be used for the bypass feature since the 451m is handling the door unlock. Cannot find the iDataLink ADS-TBSL-PL model for sale. Seems a lot easier to install than the 791 or XK09.Tory209

There were a lot of changes with the newer body style Silverado. The Fortin INT-SL and INT-SL+ can do Passlock2 on either truck but I'm not sure if the GMDLBP can do just the Passlock2 on the older models. The nice thing about the ADS TBSL PL and the INT-SL is they come pre-loaded and ready to go right out of the box. The XK09 would need a flash to get the correct firmware loaded on it. You might try to find an online seller to buy an ADS TB flashed with the GM firmware. That would be an easy install with just one wire to the truck (and 4 wires to the R/S controller). Soldering is fun!

Ok. I ended up going with the Fortin Passlock-SL2 v.2. I'm not sure about the Blue (-) While running wire to remote starter or how to handle the N.C wires. My remote starter has an Oil Path Detection wire as well. Any help would be appreciated. Tory209

The (-) BLUE While Running wire goes to a R/S wire called (-) Status Out or (-) Ground While Running. A lot of those "offshore" units do not have such an output. Perhaps a (-) Ignition? That bypass input turns on the Passlock2 bypass signal. Oil Path Detection is the "offshore" equivalent of Tack Input. Not a good solution. The manual usually gives a work around, like just connecting it to Ignition.... Good luck with that R/S unit.Soldering is fun!

Yeah I've come to realize this offshore unit is a real hassle. There's no such wire on this unit. It's not the unit itself it's making the bypass work with the r/s. Tory209

It's possible, just a PITA. Your truck needs both IGN1 and IGN2 powered during a R/S. You will need to use two 12V relays to do it correctly. Use the IGN2 output to control both relays. Wire as below using 30/40 Amp SPDT Relays. R/S IGN2 to relay Pin 86, both relays Chassis Ground to Pin 85, both relays R/S IGN2 to Relay 1 Pin 87 Relay 1 Pin 30 to truck White IGN2 Chassis Ground to Relay 2 Pin 87 Relay 2 Pin 30 to bypass (-) when Running That will allow the R/S to power both vehicle ignition with isolated power and supply the needed GWR signal to the bypass module only during a R/S. You can get the relays w/ 5 wire harness from EBay, etc.Soldering is fun!