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Installed a new all aluminum Cold Case radiator in my 06 Sierra 1500 4.8L and I’m having trouble getting up to operating temperature in the normal time frame. I would think this will especially be an issue in the winter, but I’m in Texas so winters are no exactly terrible. Is this something I should be concerned about in the long run not reaching op temp on the majority of my drives? Getting my temp to the 200 degree standard operating temp will take me about 40min of non stop highway driving while the fans are running with the AC on. My temp will climb to the 185-187 thermostat opening fairly quickly 10-15min but as it opens and the fans run, it is just too much cooling for it to ever reach op temp in a decent time. Also if I keep my fans off, and it does reach 200 degrees, in 15-25min, once I turn the fans back on, the temp will drop to 185-187 within 5-10min. I know this radiator was a bit overkill for my stock application, but I wanted an aluminum rad to not worry about leaking issues in the future from plastic rads.
De Sco posted a topic in 2014-2018 Silverado & Sierra TroubleshootingHello everyone so I have a 2014 silverado 5.3 ltz here's my problem when I cut my truck off the fans keep running for almost 3 minutes and my ac doesn't work and temperature guage is at 160 can anyone help
Cooling Fans not Coming on
Jake Camacho posted a topic in Gen III and IV Small Block & DrivetrainFellas and Gals! I am having a problem with my cooling fans not coming on my 2006 GMC Sierra, 5.3. I can force them on by running the A/C constantly. But if the A/C isn’t on, the fans won’t come on till the truck reaches almost 230 degrees F, which I’m on the road to cracking a head at the temp. I’ve already replaced the fans, thermostat, engine temp sensor, checked to make sure I’ve got good water flow through my radiator, I’ve replaced all three cooling fan relays and I’ve checked the wiring harness. The fans will come on when I reach in there and manually unplug the harness from the temp sensor while the truck is running and it sometimes will throw a code after that. The only thing I can imagine may be happening is the CPU is not sending the ground signal to command the fans to come on when the engine reaches the appropriate temp (≈ 202, without the A/C being on). Has anyone ever experienced the CPU messing up and not send a ground signal to the system, what am I missing? S.O.S. PLEASE SEND HELP!!
Radiator cooling fans inop
Alex Martin posted a topic in 1999-2013 Silverado & Sierra 1500Hey guys, i have a 2005 gmc yukon with electric fans. It is the 5.3 and the electric fans will not turn on. I have replaced the coolant temp sensor and the relays and it is still inop. If i send 12v to the fans they will turn on and constant power is getting too the two 4 prong relays my tools will not fit to test the 5 prong. None of the fueses are blown either and relays have resistance to them. It has a slight hickup on startup but not much of one and sadly no they do not work with the ac on the temp will go straight past 210 when parked
So, I have a 2011 Sierra half ton, it’s overheating at idle in gear. In park it won’t. Soon as you start moving it cools off, the fans do turn on but they don’t seem to turn on fast enough. It’s already starting to overheat by the time the e fans kick on. Soon as you start moving, cools right off instantly. This tells me maybe sticky t stat? Maybe coolant temp sensor? What temp are the fans supposed to kick on? Thoughts...tia
Hello. My brother seems to have a bit of a weird problem. He recently swapped his belt driven fans for an electrical ones. He did all the wirings and changed the temp Sensor. Although the AC fan works fine, It seems that the radiator fan turns on instantly when the engine is cold, but when the engine reaches the operating temperature it turns off and stays off. What could cause this? Did he flip a wire somewhere?
My issue is my fans wont turn on. I replaced the relays in the fuse box that did not work. I took the relay cap off the low fan relay and noticed it wasnt closing the connection all the way. Im read that this happens when there is not enough power to close the switch? So this means i might have an exposed wire somewhere grounding out? Does anyone have any insight to this? Or does anyone know what color the wire is from the fuse box so maybe i can try and trace this wire down and find the issue. So far i havent been able to find much. Thank you