Jump to content

Fan still running and temp not moving off 160

JohnThomas70
 Share

Recommended Posts

sprky New Member

sprky

Posted
Posted

2016 GMC Sierra fan blowing, temp gauge at 160 and I have Engine warning light on for P0156, P0157 (O2 sensor codes nothing to do with engine temp). Clear the ODB codes,  temp gauge corrects and blower stops. One reason has to be electrical. I am not a mechanic by a long shot! Just changed the sensors and still throwing the codes. Bummin'!

troy tremaine New Member

troy tremaine

Posted
Posted

Let me correct my last post.  This temporarily made the issue go away but I ultimately think it cleared the computer memory.  Issue came back again.  The issue is the thermostat.   It’s a simple replacement and takes about 20 minutes.   I replaced and all issues went away and I also noticed my heat in the cabin got significantly hotter which is also a sign of a bad thermostat.  I would replace both the thermostat and sensor since they’re in the same spot.   

  • 11 months later...
Dena New Member

Dena

Posted
Posted

Replaced battery recently. Replaced sensor and thermostat but fans still coming on high and no fluid moving through hoses. Could it be a bad new thermostat? Should we have scanner hooked up to see what codes come up?

mikeyk101 Senior Enthusiast

mikeyk101

Posted
Posted
2 hours ago, Dena said:

Replaced battery recently. Replaced sensor and thermostat but fans still coming on high and no fluid moving through hoses. Could it be a bad new thermostat? Should we have scanner hooked up to see what codes come up?

Did you replace with OEM or aftermarket sensor and thermostat? I had bad experience several months after replacing my thermostat with aftermarket. A Motorad to be specific. Replaced it again with an OEM but went with a lower temp (194⁰) one and it's been fine every since.

  • Like 1
  • 4 months later...
GregGoBlue New Member

GregGoBlue

Posted
Posted

My 2016 GMC Sierra with the 5.3L has done the fan on high for 3 straight years. I live in Michigan and the only time the fan turns onto high is in the Spring and Fall time periods when we temperatures between 40F & 60F degrees. So any time its in the 40's or 50's it seems to happen, then in the winter when its teens, 20's and 30's it never turns on. The same goes for the summer when its 70's, 80's, 90's it never turns on. I have replaced my coolant sensor with an AC Delco OEM unit. I disconnected the battery for 10 minutes and the problem temporarily went away, but came back two days later. Next I've purchased a thermostat, I plan to change it out this week. I am slowly doing one thing at a time to see what the root cause was for my situation to hopefully help the next person. I have no codes being thrown, there is no check engine light coming on.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Jus Cruisin
      2027 GMC Sierra: Official Discussion

      By Jus Cruisin · Posted

      I was the GM of a Lincoln Mercury dealership back in the 80's. The service lot was always full with "broken" ones. Plenty of transmissions, power windows and a/c repairs. The only one I'd consider owning would be the Marauder at this point and it certainly wouldn't be a daily driver.  My 2025 GMC Sierra 1500 Denali Ultimate is my "Lincoln Town Car" in my retirement. I want all the "stuff". Big infotainment screens, one touch power windows, Supercruise (I won't buy another vehicle without it), hands free pretty much everything. I'm going to swap my current truck for a 2027 Yukon Denali Ultimate so I can have the air suspension and surround vision recording along with all the other "stuff". 
    • Byrds8
      Ac not keeping up

      By Byrds8 · Posted

      Yep mine is on backorder also.
    • smit303
      2027 GMC Sierra: Official Discussion

      By smit303 · Posted

      The Denali Ultimate's grille is tinted, but the "regular' Denali has a bright chrome grille like the current models.
    • Jsdirt
      2027 GMC Sierra: Official Discussion

      By Jsdirt · Posted

      Because that is IDIOTIC, much like this question. They've already been forced to do it by past administrations - why would you roll that back when it's a GOOD thing?  WHO IS ARGUING FOR LOWER MILEAGE???? 😂  NOBODY IS!!   I'm certainly not! What I want is RELIABLE vehicles again that are worth the price paid!    I don't get your logic here ...   In 2003 I paid $2,200 for our '86 Grand Marquis. It's STILL running and I've never been inside the engine, aside for the timing cover since it was leaking, so I threw a new timing set in since that makes sense. Transmission is ORIGINAL. Electric pump in the gas tank is ORIGINAL. Rear end is ORIGINAL. I'd have to hit my head REAL hard to want to pay $60k or more for a car that still can't come close to the comfort, seating and storage space, or reliability of this one. Nothing is even in the ball park! Hundreds of thousands of brands and models have been built and sent to the crusher while this one keeps on going!   https://postimg.cc/Z9XRrCSg   I've got a whole fleet of cars, motorcycles, and a truck close to this age for summer and winter. No one could pay me enough to buy anything built this century. I have zero use for any it.
    • Jsdirt
      2027 GMC Sierra: Official Discussion

      By Jsdirt · Posted

      Since I'm the one who has to fix them when they break, I'll take vehicles over 30 years old all day, EVERY day, over ANY modern crap. Have you attempted any repairs on anything built after 2006? It's a friggin nightmare, and gets worse the newer the model year.    If I had the will or desire, I can make any car of any age outside of a Model T (I don't have THAT much will ...) just as powerful, comfortable, and have all the tech the new stuff does, and get pretty close in mileage, too. I prefer SIMPLICITY. The less the vehicle has, the less to fix WHEN it breaks, not IF.   I'm glad you snot-nosed punks don't like them. More for us, plus that keeps the prices from climbing more than they already have.👍

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...