Hello,

 

I had the D3 installed in my 2007 Chevy by circuit city. The installer hooked up the speed pulse but then disconnected it and he said "the vehicle speed pulse is too fast for the screen to read"

 

I only have a functional understanding of the speed pulse.

 

Any info would be greatly appreciated!

Doesn't sound right. I have a listing for the VSS in your truck as:

 

 

 

Speed sense in the yellow/black wire at the ECM, black 73 pin plug, pin 57

 

The ECM (Engine Control Module) is on the driver side fender, behind the headlight.