Non-functioning temp gauge

C30 Dooley · 03-21-2007, 12:10 PM

I wonder if someone can point me in the general direction of the temp sending unit for my '85 Silverado C30. Engine is a 350. The gauge had been reading very low for quite a while. I recently put a new radiator, tstat, & heater core in her, and now it seems the gauge doesn't move at all. The rest of the cluster works fine, so I figure the sending unit is bad.

Thanks!

bradrhale · 03-21-2007, 03:11 PM

drivers side head almost halfway back. i had to replace mine but i dont believe that you can replace just that unit. it is not a sending unit like the oil is where you disconnect the wire and go. i ended up going with an aftermarket guage. partly because i am too lazy to tear into the panel and replace the factory unit from the junkyard.

claytonfrnk · 03-21-2007, 07:27 PM

I would buy a 3 gauge pod and be done with all the factory gauges. So you don't have to trouble shoot faulty gauges for a while but thats just me. If your under the hood once mite as well do em all.

nnunez · 03-22-2007, 11:41 AM

Quote:

Originally Posted by bradrhale

drivers side head almost halfway back. i had to replace mine but i dont believe that you can replace just that unit. it is not a sending unit like the oil is where you disconnect the wire and go. i ended up going with an aftermarket guage. partly because i am too lazy to tear into the panel and replace the factory unit from the junkyard.

Is it the same as the coolant sending unit?

Mine is in the front near the neck where the thermostat is located. BTW, I have a 5.0 enigine.

bradrhale · 03-23-2007, 06:53 AM

yes, but he has the 5.7.

C30 Dooley · 03-24-2007, 11:16 AM

Quote:

Originally Posted by bradrhale

drivers side head almost halfway back. i had to replace mine but i dont believe that you can replace just that unit. it is not a sending unit like the oil is where you disconnect the wire and go. i ended up going with an aftermarket guage. partly because i am too lazy to tear into the panel and replace the factory unit from the junkyard.

Found it! It sits between the frontmost two spark plugs, has a green wire going to it. I cleaned up the connection and now I'm getting it to read about where it always was, which is on the cold side of the first graduation on the gauge. Now I don't know whether to try to find the sender, or just let it ride.

C30 Dooley · 03-24-2007, 08:15 PM

Quote:

Originally Posted by C30 Dooley

Found it! It sits between the frontmost two spark plugs, has a green wire going to it. I cleaned up the connection and now I'm getting it to read about where it always was, which is on the cold side of the first graduation on the gauge. Now I don't know whether to try to find the sender, or just let it ride.

To clarify, I mean I don't know whether to try to find a new replacement sending unit or just leave well enough alone.

bradrhale · 03-24-2007, 08:31 PM

if it is working like it is supposed to and goes up when it gets up to temp and then back down when the t-stat kicks in, i wouldnt worry about it. i changed mine when it wouldnt come off zero in the middle of summer with the ac on in downtown traffic.

03-21-2007, 12:10 PM	#1
C30 Dooley Junior Member Join Date: Mar 2007 Posts: 3	Non-functioning temp gauge I wonder if someone can point me in the general direction of the temp sending unit for my '85 Silverado C30. Engine is a 350. The gauge had been reading very low for quite a while. I recently put a new radiator, tstat, & heater core in her, and now it seems the gauge doesn't move at all. The rest of the cluster works fine, so I figure the sending unit is bad. Thanks!

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03-21-2007, 03:11 PM	#2
bradrhale Moderator Join Date: Apr 2006 Location: Texas Posts: 2,744	drivers side head almost halfway back. i had to replace mine but i dont believe that you can replace just that unit. it is not a sending unit like the oil is where you disconnect the wire and go. i ended up going with an aftermarket guage. partly because i am too lazy to tear into the panel and replace the factory unit from the junkyard.

03-21-2007, 07:27 PM	#3
claytonfrnk Full Member Join Date: Aug 2006 Posts: 41	I would buy a 3 gauge pod and be done with all the factory gauges. So you don't have to trouble shoot faulty gauges for a while but thats just me. If your under the hood once mite as well do em all.

03-23-2007, 06:53 AM	#5
bradrhale Moderator Join Date: Apr 2006 Location: Texas Posts: 2,744	yes, but he has the 5.7.

03-24-2007, 08:31 PM	#8
bradrhale Moderator Join Date: Apr 2006 Location: Texas Posts: 2,744	if it is working like it is supposed to and goes up when it gets up to temp and then back down when the t-stat kicks in, i wouldnt worry about it. i changed mine when it wouldnt come off zero in the middle of summer with the ac on in downtown traffic.