89 2wd silverado 350: sensor identification - The 1947 - Present Chevrolet & GMC Truck Message Board Network

775stepside · 03-02-2015, 02:05 AM

Trying to figure out what sensor is the one that is on the manifold next to the thermostat housing? Is it the water temp sensor? I picked one up from the auto parts store and the connector doesn't fit? It seems like the connected is broken? I'm not sure though can someone chime in?

**Palf70Step** · 03-02-2015, 06:29 AM

From everything I remember, the water temp is in the driver or passenger side head, not the intake manifold. I'll look at the 94 later when the sun is up and see if it rings a bell with me.

95 S_Trucker · 03-02-2015, 06:49 AM

The coolant temp sensor for the ecm/pcm is right next to the thermostat. The coolant sending unit for the gauge is in the drivers side cylinder head between the 1 and 3 exhaust ports.

BigBlocksRule · 03-02-2015, 07:38 AM

Sounds like you got the gauge sensor, you're asking about the one for the computer.

SAVE THE OLD ONE! If the computer temp sensor ever takes a crap, it'll make your engine run very rich, the computer will think it's waaay cold and try to warm it up. Take the spare you saved out of the glove box and plug it in, don't worry about screwing it in until you have the proper tools and time. Leave the sensor laying on the intake, it will correct the problem if that sensor goes bad.

775stepside · 03-02-2015, 02:30 PM

No I must of got the right one but the connector doesn't hook up to it, it has 2 pin connections, and the one for the guage on the side of the head looks similar to oil pressure, u just slide the connector over it. The problem I'm having is if there's another type of sensor that goes on the manifold because my connector seems to be just round and flat at the end.

speedygonzales · 03-02-2015, 04:24 PM

Look like this?

775stepside · 03-02-2015, 05:32 PM

Yea it does but my connector is round It won't go inside the mushroom thing inside

speedygonzales · 03-02-2015, 06:11 PM

Put a picture up of your original sensor

BigBlocksRule · 03-02-2015, 06:55 PM

Or connector

775stepside · 03-02-2015, 07:58 PM

Fixed thanks guys

BigBlocksRule · 03-02-2015, 09:14 PM

Oh, man, you can't leave us hangin' like that

What was it?

775stepside · 03-02-2015, 09:25 PM

Haha give me a break ok, so on the connector side the top part of the sensor broke off and I looked at it and I thought it was the actual connector, until I really looked at the sensor and saw it was broken off and I pulled the broken piece off the connector.

BigBlocksRule · 03-03-2015, 06:55 AM

Cool. We've all had something similar happen to us.
Glad to hear you got 'er fixed!

03-02-2015, 02:05 AM	#1
775stepside Registered User Join Date: Mar 2014 Location: Elko, nevada Posts: 286	89 2wd silverado 350: sensor identification Trying to figure out what sensor is the one that is on the manifold next to the thermostat housing? Is it the water temp sensor? I picked one up from the auto parts store and the connector doesn't fit? It seems like the connected is broken? I'm not sure though can someone chime in?

03-02-2015, 06:29 AM	#2
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,640	Re: 89 2wd silverado 350: sensor identification From everything I remember, the water temp is in the driver or passenger side head, not the intake manifold. I'll look at the 94 later when the sun is up and see if it rings a bell with me. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

03-02-2015, 06:49 AM	#3
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: 89 2wd silverado 350: sensor identification The coolant temp sensor for the ecm/pcm is right next to the thermostat. The coolant sending unit for the gauge is in the drivers side cylinder head between the 1 and 3 exhaust ports.

03-02-2015, 07:38 AM	#4
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: 89 2wd silverado 350: sensor identification Sounds like you got the gauge sensor, you're asking about the one for the computer. SAVE THE OLD ONE! If the computer temp sensor ever takes a crap, it'll make your engine run very rich, the computer will think it's waaay cold and try to warm it up. Take the spare you saved out of the glove box and plug it in, don't worry about screwing it in until you have the proper tools and time. Leave the sensor laying on the intake, it will correct the problem if that sensor goes bad.

03-02-2015, 02:30 PM	#5
775stepside Registered User Join Date: Mar 2014 Location: Elko, nevada Posts: 286	Re: 89 2wd silverado 350: sensor identification No I must of got the right one but the connector doesn't hook up to it, it has 2 pin connections, and the one for the guage on the side of the head looks similar to oil pressure, u just slide the connector over it. The problem I'm having is if there's another type of sensor that goes on the manifold because my connector seems to be just round and flat at the end.

03-02-2015, 04:24 PM	#6
speedygonzales Registered User Join Date: Jan 2006 Location: Smithfield, VA Posts: 1,501	Re: 89 2wd silverado 350: sensor identification Look like this? __________________ 99 Z71 (98 body style) Pride and joy

03-02-2015, 05:32 PM	#7
775stepside Registered User Join Date: Mar 2014 Location: Elko, nevada Posts: 286	Re: 89 2wd silverado 350: sensor identification Yea it does but my connector is round It won't go inside the mushroom thing inside

03-02-2015, 06:11 PM	#8
speedygonzales Registered User Join Date: Jan 2006 Location: Smithfield, VA Posts: 1,501	Re: 89 2wd silverado 350: sensor identification Put a picture up of your original sensor __________________ 99 Z71 (98 body style) Pride and joy

03-02-2015, 06:55 PM	#9
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: 89 2wd silverado 350: sensor identification Or connector

03-02-2015, 07:58 PM	#10
775stepside Registered User Join Date: Mar 2014 Location: Elko, nevada Posts: 286	Re: 89 2wd silverado 350: sensor identification Fixed thanks guys

03-02-2015, 09:14 PM	#11
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: 89 2wd silverado 350: sensor identification Oh, man, you can't leave us hangin' like that What was it?

03-02-2015, 09:25 PM	#12
775stepside Registered User Join Date: Mar 2014 Location: Elko, nevada Posts: 286	Re: 89 2wd silverado 350: sensor identification Haha give me a break ok, so on the connector side the top part of the sensor broke off and I looked at it and I thought it was the actual connector, until I really looked at the sensor and saw it was broken off and I pulled the broken piece off the connector.

03-03-2015, 06:55 AM	#13
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: 89 2wd silverado 350: sensor identification Cool. We've all had something similar happen to us. Glad to hear you got 'er fixed!



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