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C15_Sierra · 10-01-2011, 11:21 PM

OK in doing a little bit more research, apparently the PCM will be a "calibration box" so to speak, now the question becomes:

How can I wire up the electric speedo to work with the PCM?

Thanks!

10-01-2011, 11:21 PM	#2
C15_Sierra Registered User Join Date: Apr 2011 Location: Hartford CT Posts: 223	Re: Electric speedo question OK in doing a little bit more research, apparently the PCM will be a "calibration box" so to speak, now the question becomes: How can I wire up the electric speedo to work with the PCM? Thanks! __________________ -Steve 1980 GMC C15 Sierra LWB Dark Carmine Red/Carmine Int Was: 250/3spd (1980-88), then a 305/TH350 (1988-2011) Now: 5.3/4L60E, 2.73 12-bolt open rear