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-   -   1994 GMC truck unknown plug (https://www.truckforums.com/forum/chevy-silverado-gmc-sierra-forum-11/1994-gmc-truck-unknown-plug-14453/)

terry274 08-17-2010 05:15 PM

1994 GMC truck unknown plug
 
I have a 1994 GMC Sierra with the 5.7 (350) engine that I bought three months ago. On the passenger side of the engine is a plug with two wires, one wire is brown the other is blue. I can't find a place to plug this wire in. It is near the EGR valve but the EGR valve does not have an electrical connection. The EGR solenoid has a connection plugged in. The truck has an automatic transmission and AC.
Does anyone know what the purpose of this plug is?
http://i527.photobucket.com/albums/c...74/p_00107.jpg

http://i527.photobucket.com/albums/c...74/p_00106.jpg

chrisbmo2000 08-18-2010 05:46 PM

looks like it could be for the oil pressure switch, or it could just be an extra for an optional part

blue chevy29 08-21-2010 09:54 AM

hay man does the truck have an under hood light

terry274 08-21-2010 06:24 PM

Yes, it has an underhood light, but the light is connected.


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