2005 GMC Sierra, Viper 5701, XK09

I have an 05 GMC Sierra 1500 and a Viper 5701 car alarm / remote start system. I also purchased an Xpresskit XK09 module with DLPKGM firmware. After reading through the forums this is how I plan on wiring my system: Main Harness H1 (12 pin): Red -12V constant Brown - Siren Black - Ground White – Parking light output (gray and black wire) H3 10-pin Pink - Ignition 1 pink wire RED / White – 12V Constant Orange - Hooked to Accessory 1 orange Violet - Car Side of starter wire Yellow Green – Ignition side of starter wire Yellow Red - 12V Constant Pink/white - Ignition2 White wire RED / black - 12v Constant RS (5 pin): BLACK/ White - Grounded Violet/White – ??? (tach???) Brown - White wire above brake pedal Grey - Hood Pin XK09 Green wire - OBD2 D2D I plan on using the D2D option of my XK09. Questions: Do I only need to hook up the one Green wire (in addition to D2D) on the XK09? What about the RS violet/white tach wire on the viper 5701? Does the XK09 take care of this? Also, do I need to change the flash park polarity to negative for this system? This is the white H1 wire connecting to the gray/black wire on the truck. Last. I plan on doing the following: -program the XK09 -learn tach -change D2D jumpers to external -Flash Polarity ??? -Set transmission mode to Automatic Missing anything? Thanks in advance for the help. You guys rock!

You will need to set the parking light output to (-). You can hook up a tach or you can use virtual tach. I wouldnt trust the tach output of any module. It works about 50% of the time. Other than that you are right on track.

Awesome. Thanks for the quick response. I will try the virtual tach first to see how it works otherwise I will wire it directly. Is this correct? -violet/white wire to white instrument cluster wire -set viper 5701 tach from virtual to voltage mode Anything else? Any other wires for direct tach wiring?

The 5701 has 3 engine checking modes - tach, virtualtach, and voltage. Voltage should be a last resort. If you use virtual tach there is no wire used. the PURPLE / white from the 5701 can be cut off and capped.

okay, I have the alarm / remote start system installed. I programmed the XK09 and it is communicating via D2D (I think). When I use the factory key fob the DEI siren chirps once when locked and twice when unlocked. The only problem is that I cannot get the viper key fobs to work (neither the 1 way or two way). I tried learning both key fobs but still nothing. I also tried removing all key fobs and still nothing. These are the steps I took: open a door turn the key to the on position push and release the valet button once push the valet button once more and hold the siren chirps once push the lock button the key fob (the siren never chirps) The only thing I don't have connected is the hood pin but I don't think that should make a difference at this point. The truck starts and runs normally with the key. Do you think the issue could be because I don't have the green or violet wire on the H1 harness installed? Shouldn't the Xk09 take care of this? Thanks for the help.

update: When in programming mode there are several ways to exit the menu. 1. turn the key off 2. wait 30 seconds and it times out 3. close the door (because the door must be open to program) I tried closing the door when in programming mode and the siren chirped several times to indicate the menu was exited. So it appears that the system is talking to the XK09 module. I forgot to mention that this is a factory refurbished model. Any suggestions?

Update: In order to program the remotes I had to do the following: Press and hold "f" until LED lights solid (approximately 10 seconds), then press and hold remote starter button(circle w/arrow) until LED blinks three times and the amber transmit LED lights up. Now you have to enter the remote control learn routine: Turn ignition on, within ten seconds press and release control button on antenna then, press and hold control button while pressing the lock button on remote. System will respond (horn/chirp/flashing parking lights) when holding control button and when pressing lock button on remote. Once the remotes were programmed everything else fell into place. How can I get both passenger and driver door locks to unlock at the same time with a single press of the unlock button? Thanks for the help. Everything works great!

To get both doors to unlock with one press of the Vipers' Unlock button you must change the programming of the Viper to "Double Unlock Pulse".  It is Menu 1, Menu Item 6, to Option 2.  It will still unlock the Drivers door first and then a split second later the Passanger door will unlock, all with just one press of the Vipers Unlock button.

The other way is to go to W2W mode between the Viper and the XK09 bypass module instead of D2D.  That will get both doors to unlock at the exact same time with one press of the unlock button with no Viper programming change.

Soldering is fun!

Thanks for the advice. I tried programming the system as option 2 but that didn't work. I also tried option 4 and that didn't work either. Basically I want to hit lock and have both doors lock and the alarm set to active, as well as pressing unlock once and having both doors unlock (option 4). When I set it to option two or option four the key fob beeps twice at me but still only the one action from the doors. Maybe it is sending the pulses too close together? Any more suggestions?

This forum has been FANTASTIC! I have never intalled an alarm system before and because of all the help topics posted on this forum I wired it up correctly first try. Thank you very much everyone.

Hate to say it but changing from D2D to W2W might be the sure way to achieve your goal.  In the XK09 DLPKGM Type 3 Install diagram, the Unlock input is labeled as "Unlock All".Soldering is fun!