Radiator electric cooling fans not coming on

[FrostyLT05]

I have a 2005 Tahoe 5.3 2WD with 165K miles on it. Recently, I noticed that my electric cooling fans on the radiator are not turning on. My coolant temp gauge is working normally and I have not observed any overheating. They do not come on under any condition; running the AC nor the engine coming up to operating temp and not under any driving condition.

I replaced all of the relays and fuses in the electric fan fuse/relay box beside the main fuse box. I’ve replaced my coolant temperature sensor with a new AC Delco unit. I unplugged the coolant temp sensor and started the truck, the fans turned on immediately. The fans are getting power, and they work.

I’m not sure what could be wrong. I have hit a wall and wanted your ideas as to what could be wrong before I throw in the towel and take it to a mechanic.

The truck will be parked until I get this figured out.

Thank you.

 

[OR VietVet]

Welcome to the forum from Oregon.

A friend of mine had a similar problem, about 2 years ago, and he replaced this part: https://www.rockauto.com/en/moreinfo.php?pk=4664736&jsn=716, and it was fixed. He got it from a dealer somewhere. The one I show you is an aftermarket part but I recommend the Genuine GM or Delco part if you can find one, part #19189400.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

 

[FrostyLT05]

Welcome to the forum from Oregon.

A friend of mine had a similar problem, about 2 years ago, and he replaced this part: https://www.rockauto.com/en/moreinfo.php?pk=4664736&jsn=716, and it was fixed. He got it from a dealer somewhere. The one I show you is an aftermarket part but I recommend the Genuine GM or Delco part if you can find one, part #19189400.

Thank you! I will give this a shot. I was thinking this was a possibility but was hoping it could have been something more simple. Not looking forward to the wiring but I would like to start driving the Tahoe again.

 

[FrostyLT05]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

Thank you! I look forward to becoming a participating and contributing member. I’ve been around Chevy trucks all my life. It’s about time I signed up here!