What is this connector? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Zach079xxx · 03-16-2016, 07:48 PM

I was cleaning my engine bay today getting all that nasty winter crap off of all my polished parts and found this. What is this connector for?

Jake Wade · 03-16-2016, 07:57 PM

Should be a mate to it coming off the distributor. Your distributor may have been swapped to the old style which does not have this so, someone left that hanging out.

Zach079xxx · 03-16-2016, 08:09 PM

As far as I know it had the original 85' HEI dizzy, then I had a guy replace it with a MSD HEI couple months back.. I wonder if it connects up to the MSD, I didn't see any other wire though, what's the function?

I should add, the truck originally had a 305, now has a 350

Jake Wade · 03-16-2016, 08:42 PM

IF your current distributor does not have the mate to that plug coming out of it, a pre computer style distributor was installed. The computer has been bypassed for that part.

Jake Wade · 03-16-2016, 08:44 PM

Personally, you/your motor are/is better off with what you got now, in my opinion.

Mr.Chevy4x4 · 03-16-2016, 08:57 PM

It was for the ESC (electronic spark control) module that those trucks came with (plugged into the distributor). It retarded spark advance based on a knock sensor that was on the lower passenger side of the block.

Zach079xxx · 03-16-2016, 09:06 PM

Thanks guys. I knew that connector wasn't there until recently lol

Just kind of scared me seeing an unplugged wire!

Pontiac1976 · 03-16-2016, 10:59 PM

GM set up a lot of trucks with both set up's for the DIST.. As my 84 has duel set ups parts truck that I got all the wiring w/fuse box & front clip off for my 77.

Zach079xxx · 03-16-2016, 11:11 PM

That would explain it. Thanks you guys! Today was a good day, I've been having a pretty serious oil leak everywhere I'd go I had a puddle of oil left behind, well today was nice weather and I actually had time to look into it. Climbed under the truck and saw oil down the side of the engine, popped the hood and I could tighten the last valve cover bolt with my finger, tightened that up and no more oil leak! Thank the lord, it was driving me insane recently.

03-16-2016, 07:48 PM	#1
Zach079xxx Registered User Join Date: Apr 2015 Location: Shenandoah Valley, Virginia Posts: 332	What is this connector? I was cleaning my engine bay today getting all that nasty winter crap off of all my polished parts and found this. What is this connector for? __________________ 85' GMC Sierra Classic Built 350; Weiand intake, Holley 600, Thumpr Cam Built 350 turbo with shift kit & 2500 Stall Thumpin' away

03-16-2016, 07:57 PM	#2
Jake Wade Registered User Join Date: Aug 2005 Location: Louisiana Posts: 711	Re: What is this connector? Should be a mate to it coming off the distributor. Your distributor may have been swapped to the old style which does not have this so, someone left that hanging out.

03-16-2016, 08:09 PM	#3
Zach079xxx Registered User Join Date: Apr 2015 Location: Shenandoah Valley, Virginia Posts: 332	Re: What is this connector? As far as I know it had the original 85' HEI dizzy, then I had a guy replace it with a MSD HEI couple months back.. I wonder if it connects up to the MSD, I didn't see any other wire though, what's the function? I should add, the truck originally had a 305, now has a 350 __________________ 85' GMC Sierra Classic Built 350; Weiand intake, Holley 600, Thumpr Cam Built 350 turbo with shift kit & 2500 Stall Thumpin' away

03-16-2016, 08:42 PM	#4
Jake Wade Registered User Join Date: Aug 2005 Location: Louisiana Posts: 711	Re: What is this connector? IF your current distributor does not have the mate to that plug coming out of it, a pre computer style distributor was installed. The computer has been bypassed for that part.

03-16-2016, 08:44 PM	#5
Jake Wade Registered User Join Date: Aug 2005 Location: Louisiana Posts: 711	Re: What is this connector? Personally, you/your motor are/is better off with what you got now, in my opinion.

03-16-2016, 08:57 PM	#6
Mr.Chevy4x4 Registered User Join Date: Jul 2007 Location: Sims, NC Posts: 531	Re: What is this connector? It was for the ESC (electronic spark control) module that those trucks came with (plugged into the distributor). It retarded spark advance based on a knock sensor that was on the lower passenger side of the block. __________________ All things Chevy truck: 1986 SWB "Jolene" boosted 5.3/4l80e project

03-16-2016, 09:06 PM	#7
Zach079xxx Registered User Join Date: Apr 2015 Location: Shenandoah Valley, Virginia Posts: 332	Re: What is this connector? Thanks guys. I knew that connector wasn't there until recently lol Just kind of scared me seeing an unplugged wire! __________________ 85' GMC Sierra Classic Built 350; Weiand intake, Holley 600, Thumpr Cam Built 350 turbo with shift kit & 2500 Stall Thumpin' away

03-16-2016, 10:59 PM	#8
Pontiac1976 Registered User Join Date: Oct 2015 Location: Ottawa, Ontario, Canada Posts: 752	Re: What is this connector? GM set up a lot of trucks with both set up's for the DIST.. As my 84 has duel set ups parts truck that I got all the wiring w/fuse box & front clip off for my 77. __________________ 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.

03-16-2016, 11:11 PM	#9
Zach079xxx Registered User Join Date: Apr 2015 Location: Shenandoah Valley, Virginia Posts: 332	Re: What is this connector? That would explain it. Thanks you guys! Today was a good day, I've been having a pretty serious oil leak everywhere I'd go I had a puddle of oil left behind, well today was nice weather and I actually had time to look into it. Climbed under the truck and saw oil down the side of the engine, popped the hood and I could tighten the last valve cover bolt with my finger, tightened that up and no more oil leak! Thank the lord, it was driving me insane recently. __________________ 85' GMC Sierra Classic Built 350; Weiand intake, Holley 600, Thumpr Cam Built 350 turbo with shift kit & 2500 Stall Thumpin' away



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