wiring diagram, and trans,speedo change over - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gafiredog · 04-27-2013, 08:36 AM

I have looked and looked, a few days ago I saw a thread that showed how to change a electronic to cable, (or other way around) speedometer gear on a 700r4 ( I think). and a while back I saw a wiring diagram for the engine comp. for a 80s silverado. I can't find them any where, maybe looking in the wrong section. any help ? thanks, guys Art

**hatzie** · 04-27-2013, 05:30 PM

The GM wiring diagrams for all 73-91 except 1984 are in my sig. Maybe someone will chime in on the rest.

walkerscott · 04-27-2013, 06:00 PM

what year truck do you have

not sure i understand what your asking

700r4 will have a cable driven speedo... but you can also get a special gm speedo adaptor that fits in the trans and gives a electronic signal in addition

cop cars had these adaptor

then there is also JTR jag that run ... are you running and ecm ?

04-27-2013, 08:36 AM	#1
gafiredog Registered User Join Date: May 2008 Location: metro Atlanta, Ga. Posts: 196	wiring diagram, and trans,speedo change over I have looked and looked, a few days ago I saw a thread that showed how to change a electronic to cable, (or other way around) speedometer gear on a 700r4 ( I think). and a while back I saw a wiring diagram for the engine comp. for a 80s silverado. I can't find them any where, maybe looking in the wrong section. any help ? thanks, guys Art __________________ Art 1975 c-10 stepper 1978 single cab dually 1987 crewcab dually 1986 crewcab single wheel 1948 anglia- (the dixie twister super gas)

04-27-2013, 05:30 PM	#2
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 5,020	Re: wiring diagram, and trans,speedo change over The GM wiring diagrams for all 73-91 except 1984 are in my sig. Maybe someone will chime in on the rest. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

04-27-2013, 06:00 PM	#3
walkerscott Registered User Join Date: Apr 2012 Location: Denver CO Posts: 67	Re: wiring diagram, and trans,speedo change over what year truck do you have not sure i understand what your asking 700r4 will have a cable driven speedo... but you can also get a special gm speedo adaptor that fits in the trans and gives a electronic signal in addition cop cars had these adaptor then there is also JTR jag that run ... are you running and ecm ?



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