Need Help: Identify these plugs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CT-Truckster · 11-23-2004, 04:31 AM

Somebody tell me what these plugs used to go to on my 84. They where danglin down behind the motor on the tranny. I'm thinking one or both went to the lockup converter? Which someone before me replaced the TH350C with regular old th350, Along with the esc distributor for a non esc HEI, The plug for it was a danglin' too. THese are the only two plugs that weren't connected to anything that I couldn't readily identify what they are for. I guess I need to get me a manual.

beaterC10 · 11-23-2004, 08:28 AM

The round plug looks like a kock sensor plug with is not needed since the ESC dizzy is absent. My truck had the sensor on the passenger side about the middle of the block. The four prong plug would be to the transmission, again not needed.

Jonboy · 11-23-2004, 09:20 AM

the knock sensor has one large round hole in the middle, and two places that grab the sensor on the sides. The one on the left looks like it went to the oil pressure sender that would have gone behind the distrubutor on that year. I think the trucks with gauges had 2 prongs like that one, and the trucks with lights had one prong, IIRC. The other plug does indeed go to the trans for the lockup converter.

dons454s · 11-23-2004, 12:04 PM

Yes I agree oil on the left and tranny on the right

*gn4u2c* · 11-23-2004, 12:40 PM

100% correct oil/ tranny if you put a lockup unit in be sure to plug it in .

11-23-2004, 04:31 AM	#1
CT-Truckster ? Join Date: Jul 2002 Location: Dyersburg, TN Posts: 471	Need Help: Identify these plugs Somebody tell me what these plugs used to go to on my 84. They where danglin down behind the motor on the tranny. I'm thinking one or both went to the lockup converter? Which someone before me replaced the TH350C with regular old th350, Along with the esc distributor for a non esc HEI, The plug for it was a danglin' too. THese are the only two plugs that weren't connected to anything that I couldn't readily identify what they are for. I guess I need to get me a manual. Attached Images

11-23-2004, 09:20 AM	#3
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	the knock sensor has one large round hole in the middle, and two places that grab the sensor on the sides. The one on the left looks like it went to the oil pressure sender that would have gone behind the distrubutor on that year. I think the trucks with gauges had 2 prongs like that one, and the trucks with lights had one prong, IIRC. The other plug does indeed go to the trans for the lockup converter. __________________ 1974 Jimmy- 5.3/4L80e/NP241

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

11-23-2004, 08:28 AM	#2
beaterC10 Senior Member Join Date: Jul 2003 Location: Indianapolis, IN Posts: 1,277	The round plug looks like a kock sensor plug with is not needed since the ESC dizzy is absent. My truck had the sensor on the passenger side about the middle of the block. The four prong plug would be to the transmission, again not needed.

11-23-2004, 12:04 PM	#4
dons454s Registered User Join Date: Nov 2004 Location: Claysburg, Pa Posts: 408	Yes I agree oil on the left and tranny on the right

11-23-2004, 12:40 PM	#5
gn4u2c Account Suspended Join Date: Mar 2003 Location: southern pa Posts: 698	100% correct oil/ tranny if you put a lockup unit in be sure to plug it in .



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.