Help with C950 install
12-11-2009, 07:05 PM
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Car: 1992 T/A
Engine: 5.7l 355
Transmission: 4L60
Axle/Gears: 3.42
Help with C950 install
I just got my C950 in and I was trying to figure out what, if anything, do I need to keep from the stock ecm. I've been looking everywhere for a pinout diagram of the four connectors (3 from the ecm, and one from under the dash) to find out what wires do what? Any help would be greatly appreciated. I've been looking at this wiring harness for an hour now and I'm really getting frustrated.
12-23-2009, 11:48 AM
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Car: 86 MCSS-87 Z28
Transmission: Auto OD-5spd
Axle/Gears: 3.73 both cars
Re: Help with C950 install
You need a service manual wiring diagram. But, you can just pull the old harness completely out from the ECM forward and replace it with the Holley one. It is the eaisest thing to do.
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