where can i tap into under the hood to feed two sending units a steady 5 volts?

 

Hmmm, good one....don't most of the sensors use a 5v reference? Maybe tap into the TPS, just not sure which wire....

 

Tp Sensor, Map Sensor, Cam Sensor, Ac Pressure Transducer. Take Your Pick. What Are You Trying To Hook Up?

 

I have a gm map sensor and gm oil/fuel pressure sensor that I have installed for the boost and fuel pressure, but I'm not sure which wire I can get 5v off to power them. I suppose I can just take a multimeter and start testsing away but I figured I would check here before I did that

 

When I Installed My Fuel Pressure Sensor I Spliced 5v And Ground From My Map Sensor On The Top Of The Intake Cause It Was The Closest. Give Me Your Vehicle Info And I Can Get You Wirecolors.

 

egr. safe, and usally unused...

 

The vehicle is in my sig. Its an 2003 sierra denali with the lq4. Not sure what else you need. Lemme know, thanks!

I don't think I have egr.. there is nothing comming the exhaust manifolds? Do you mean there could still be wiring there? Got any idea what wire colors or where to look?

 

Why do your sending units need 5v?????

 

yip, both of them. They are gm parts, not aftermarket ones and i believe gm uses 5 volts of lots of its sensors

 

I believe that 03's don't have EGR, I thought that they did away with it in 02...at least on the 1500's...