2015 gmc sierra 1500 5.3 Cooling fans

[Jacob55682]

Hey guys I need some help with my cooling fans. So I recently noticed that my high speed fans won’t come on anymore. It’s only on low speed even on 90f ambient temp days. I haven’t noticed any overheating and AC works fine. So I try hooking up a snap on solus scan tool and commanding the fans on high but it won’t communicate with cooling fans. I even tried different scan tools and still no communication with cooling fans. I have no dtcs and fans still work but just on low speed never high anymore. 
if anyone has ideas please let me know 

thank you

[RSALAZAR79]

I have this same issue, mine overheated while towing and my radiator tank started leaking.. AC worked fine the day it overheated, then it stopped working the next day. After some troubleshooting I'm narrowing it down to the Fans being bad... still not a hard confirmation.. gonna run another test tomorrow.

[Jacob55682]

Did you ever find out the problem 

was it the fans or something else?