viper 5301 on a 01 silverado

If I remember correctly, the DB-All in D2D mode needs to have the Tach hardwired to work.  Tryconnecting the DB-All Violet/White wire from the 10 Pin connector the the Vipers' Violet/Whitewire at H2/9 and doing the program change and Tach Learn process.  Worth a try...Soldering is fun!

I have a duramax diesel. Everything currently works right now. I hit the remote start button when the glow plug light goes out it cranks and starts. According to the instructions for the dball module the tach input isn't required if using d2d. I found the tach signal wire at the cluster. I'll try hooking up the viper to it and then change the option to use the tach wire signal. But according to the manual i don't have to change any options. Atleast that's the way i read it To learn the tach signal: 1.      Start the vehicle with the key. Within 5 seconds, press and hold the Control button. 2.      After 3 seconds the status LED on your Control Center lights constant when the tach signal is learned. 3.      Release the Control button. Note: When the tachometer is programmed, the main unit automatically enters the Tachometer engine checking mode.

Good info, thanks!  That is the way I'm reading it too.   The older Viper systems came defaulted to

Virtual Tach and you had to manually change them over in programming to Tach Mode.

If you are going behind the instrument cluster, here is the Wait To Start wire info

from Audiovox :

 Wait To Start    Dark BLUE  (-)     INSTRUMENT CLUSTER PIN B3

DEI has this :

Wait to start    dk. blue (need to diode isolate see Tech Doc 1090) (-)         instrument cluster

Here is a link to a file that contains Tech Tip 1090 :  https://www.the12volt.com/installbay/file.asp?ID=1076

Soldering is fun!

thanks