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Old 07-03-2011, 01:11 PM
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94 chevy 1500 tranny wiring harness identification needed

I have a 1994 chevy silverado (early model year) with a 1500 (5.7 liter).

I am trying to figure out which transmission is in my truck. I need to replace the wiring harness. I was told it was a 4L60E, but the wiring harness is different from the one in my transmission... and all the plugs are different

I am uploading an image of both harness's. Please help me identify which transmission I have so I can order the correct part.

Thanks in advance
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Old 07-03-2011, 01:51 PM
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the ''unknown' harness you list is a early 4l60e unit with metal tabs that were held with bolts. GM changed the design to the type in the lower photo


check the plug in connectors on the harness for the solenoid at the front of the trans. The extra connector can be ignored.

Replacement aftermarket harness has more connectors so the harness fits a larger group of applications
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Old 07-03-2011, 01:59 PM
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Cool.... If that is the case, then there are several things prevent me from using the one on the bottom...

-the red plug on the top one has different grooves so the bottom one will not plug in correctly.

-the other plugs don't fit exactly either... is that going to make a difference?

-Also... the "extra plug" actually fits the (solenoid) that is in the upper position, can the solenoid be moved to that position to be plugged in?

Last edited by kellydecaire; 07-03-2011 at 02:09 PM.
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Old 07-03-2011, 02:54 PM
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Quote:
Originally Posted by kellydecaire
Cool.... If that is the case, then there are several things prevent me from using the one on the bottom...

-the red plug on the top one has different grooves so the bottom one will not plug in correctly.

-the other plugs don't fit exactly either... is that going to make a difference?

-Also... the "extra plug" actually fits the (solenoid) that is in the upper position, can the solenoid be moved to that position to be plugged in?

no, the solenoid can not be moved so it will plug in..

from the photo it looks like you have 2 OEM harnesses, early design with a later design harness too.

Aftermarket harness will fit a certain year spread of 4L60e trans like 1993 - 2002 and will have the proper connectors.

At the front solenoid locations , the aftermarket harness will have multiple connectors to fit different solenoid connectors
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