2015 GMC Sierra Fan Relay Location--- Cooling fans do not turn on

[markz]

Hi, I am having an issue with my 2015 GMC Sierra 5.3 cooling fans. I can not get them to turn on and truck starts to overheat. I tried to force them on through hp tuners and still nothing. Does anyone know where the fan relay is located? I tried everywhere on google and couldn't find an answer.

[JimCost2014]

On 1/17/2021 at 12:18 PM, markz said:

Hi, I am having an issue with my 2015 GMC Sierra 5.3 cooling fans. I can not get them to turn on and truck starts to overheat. I tried to force them on through hp tuners and still nothing. Does anyone know where the fan relay is located? I tried everywhere on google and couldn't find an answer.

Welcome to the site.

 

Give this a watch:

 

[JimCost2014]

Maybe this one since you have a GMC:

 

[C1610]

Hey, I have the same issue with my 2017 Elevation, noticed that according to the provided information the cooling fans do not have a relay? Hopefully this year someone can shed some light on this conundrum. My truck also has a check engine light that the dealership diagnosed as "lost com with bus bar" which I later pulled the code as "the grill shutters dont work". The temp has always sat at mid gauge, 100 deg Celsius. And its loaded up with kilometers, a whole 23,000 on it.