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Labor Day Putting down your wrenches or time for MORE wrenching? 
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| | | Forums66 Topics128,010 Posts1,055,299 Members48,419 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Nov 2005 Posts: 266 Shop Shark | | Shop Shark Joined: Nov 2005 Posts: 266 | My truck has the warning light temp guage. In the morning the cold light is on when I start it. The light began to work intermitently and then died. I cleaned the contacts on my temp sending unit and coated them with dielectric grease and hooked everything back up. The cold light worked on occasion and it has went out again. The bulb is good, I pulled it out and looked this last time. My question is this a bad sending unit (the contacts were almost beyond help) or do I need to swap out the contacts in the plug because they are corroded too? And how do I get the contacts out of the plug with out breaking it into pieces? Thanks in advance, Drew | | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | The problem is. "your truck is too new"  | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | If you ground the wire at the sender the light should come on. Same with the hot side. If so replce the sending unit. I like to replace it every time I get a vehicle with a hot warning light. There is no easy way to tell if the hot side is working untill it,s to late. To remove the wire from the holder put a tiny screwdriver in the front of the term. where there is a small recess. It should pull out. They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Apr 2005 Posts: 313 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 313 | According to the owners manual, all of the warning lights should be on when cranking the engine. You probably have a bad sending unit. They should be easy to find, and are easy to install. | | | | | Joined: Oct 2005 Posts: 738 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 738 | In my 61 I have a temp gauge, and then an oil and generator light. When I start the truck both the oil and generator lights come on for a couple seconds. They then fade out as the the generator sppols up and the oil pressure climbs. I would imagine that is the same way that the temp light in your truck should work. I had to change the sending unit for my temp gauge to work, it didn't work at all until I did that. Good luck with the old truck!
Kyle
"Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity." - George S. Patton My Machine | | | | | Joined: Nov 2005 Posts: 266 Shop Shark | | Shop Shark Joined: Nov 2005 Posts: 266 | I bought a new sending unit at my FLAPS. I'm getting my grandpaw to help me install it tonight and check on some other little issues that have popped up. When I crank the engine, the H, C, GEN, and OIL lights all come on. Once the engine starts, the H and GEN go out first, and once the oil pressure gets up, the OIL goes out. The C goes out once the engine is up to operating temperature. Now neither the H or C come on at all, hopefully that $13 will fix it. I'll let ya'll know if that fixes it.
Drew | | |
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