The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 67-72 Electric speedo

ls1nova71 · 08-02-2019, 09:10 AM

The speedo out put from the PCM will be pin 50, a dark green with white stripe in the C2 connector, which is either the red or green one depending on what year your engine is.

08-02-2019, 09:10 AM	#502
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: 67-72 Electric speedo The speedo out put from the PCM will be pin 50, a dark green with white stripe in the C2 connector, which is either the red or green one depending on what year your engine is. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html