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Old 07-25-2013, 02:17 AM
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Chevy 4.3 Wire harness Tranny question

I have a 4.3 vortec with a 5 speed manual Getrag tranny in a Nash Metrpolitan. The harness is for a 700r4. How can you splice in the correct connector and make it work with the computer?

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Old 07-25-2013, 05:53 PM
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Is the ECM you are running from the Auto matic setup?
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Old 07-25-2013, 09:22 PM
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Tranny setup

Yes, the harness has a 700r4 plug.
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Old 07-26-2013, 12:29 PM
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What year Vortec are we talking here? The 1992-95 with the CPI injector or the 1996-02 with the CSFI?

CPI lower intake
1)

or like this
2)


Does your ECM have 4 connectors with approx. 24-32 pins in each connector labeled blue/black/red/grey?

If you are wanting the PCM to run with your 5 speed, you simply have to hook up the VSS vehicle speed sensor out of the 5 speed into the PCM.



VSS Low is pin #29 and uses a light green/black wire
VSS signal is pin #30 and uses a purple/white wire
Both these wires are located on the BLUE C1 connector with 32 pins.

The Shift Control Lamp is pin #15 with a tan/black wire on the Black 24 pin C4 connector .

peace
Hog
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Old 07-26-2013, 01:03 PM
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4.3 Tranny

The engine is from a 1991 S10, the tranny is the Getrag 5 speed. The two connecters are 24 and 32 pin. The tranny plug has blue, gray, tan/black
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Old 07-27-2013, 03:07 PM
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OK disregard ALL of my info, you have a TBI/4.3. Technically called a Vortec engine by GM, but you will get accurate info if you refer to the engine as a TBI 4.3 V6.

Your trans harness if its for a 700r4 will just have electronics for the TCC lockup and VSS(vehicle speed sensor).


91-92 4.3L S-10 & C/K Truck uses ECM 16144288 and 16143900.
And uses Program ID Byte Type(or Mask):$A0


Here is a pinout I found online for the S/T trucks 4.3 with TBI


peace
Hog
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