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rodstored-72 · 11-30-2021, 11:04 PM

Well…after more research & talking with my friend with the hp tuner software I FINALLY figured out the correct pin assignments to read the ECM!... woo woo!! Below is the obdii port pin out. This is for a E38 ECM from a 2013 chevrolet Silverado.
Pin 1 thru pin 3= empty
Pin4= signal ground
Pin5= chassis ground
Pin6= ECM pin28 (2500) tan/blk canbus(+)
Pin7 thru pin13= empty
Pin14= ECM pin27 (2501) tan canbus(-)
Pin15= empty
Pin16= batt. (+) const. power
For me I used pin J5 from the “X4” connector (640) red/wht wire for pin 16.
I hope this will be a help to others and thank you all for the replies.
I have been able to "bump" the engine, hopefully to prime the oil areas since it has not run for 2.5 yrs. hoping that in a few weeks I can fill the fluids, put some gas in it & fire it up.

11-30-2021, 11:04 PM	#8
rodstored-72 chevy truck fan Join Date: Mar 2005 Location: Gilbert, arizona 85298 Posts: 1,963	Re: Engine wiring question(s) Well…after more research & talking with my friend with the hp tuner software I FINALLY figured out the correct pin assignments to read the ECM!... woo woo!! Below is the obdii port pin out. This is for a E38 ECM from a 2013 chevrolet Silverado. Pin 1 thru pin 3= empty Pin4= signal ground Pin5= chassis ground Pin6= ECM pin28 (2500) tan/blk canbus(+) Pin7 thru pin13= empty Pin14= ECM pin27 (2501) tan canbus(-) Pin15= empty Pin16= batt. (+) const. power For me I used pin J5 from the “X4” connector (640) red/wht wire for pin 16. I hope this will be a help to others and thank you all for the replies. I have been able to "bump" the engine, hopefully to prime the oil areas since it has not run for 2.5 yrs. hoping that in a few weeks I can fill the fluids, put some gas in it & fire it up.