Cooling fans won’t move from 10%

[Ryan gath]

19 Silverado 5.3 

Hey all, I feel as if this is my last resort, this truck has ripped my pockets off. 
My Silverado decided and a random day to not let the fans rise above 10% it isn’t cooling efficiently and my ac doesn’t work anymore as it’s hot and no fans come on when I turn the truck on and the ac on first thing. 
I brought the truck to a mechanic in town when I saw no fuses were blown, the mechanic confirmed that all fuses were good and that he could excite the fans to 100% with a scan tool. He said he didn’t know a fix. 
I went to the dealer next, they had it for a few hours then said it was the temp sensor… replaced that… no fix… then the thermostat… nothing, then we go to the wiring and they found that the ground wire on the head was loose, I thought great a fix, boy I was wrong. After 30 mins of driving I’m seeing temps of 224 on the scan tool again. I’m at loss as even the dealer can’t seem to find a fix for this. Even pinned it out, nothing.  
Just a little added part here- Motor was replaced 5k miles ago ac and rad -8k miles ago. 

Any and all help is appreciated 

[silveradosid]

the only other thing i can think of is the a/c pressure switch is not reporting properly, maybe stuck on low pressure and not commanding the fans to speed up

[GMCustomerService]

On 4/23/2025 at 9:50 PM, Ryan gath said:

19 Silverado 5.3 

Hey all, I feel as if this is my last resort, this truck has ripped my pockets off. 
My Silverado decided and a random day to not let the fans rise above 10% it isn’t cooling efficiently and my ac doesn’t work anymore as it’s hot and no fans come on when I turn the truck on and the ac on first thing. 
I brought the truck to a mechanic in town when I saw no fuses were blown, the mechanic confirmed that all fuses were good and that he could excite the fans to 100% with a scan tool. He said he didn’t know a fix. 
I went to the dealer next, they had it for a few hours then said it was the temp sensor… replaced that… no fix… then the thermostat… nothing, then we go to the wiring and they found that the ground wire on the head was loose, I thought great a fix, boy I was wrong. After 30 mins of driving I’m seeing temps of 224 on the scan tool again. I’m at loss as even the dealer can’t seem to find a fix for this. Even pinned it out, nothing.  
Just a little added part here- Motor was replaced 5k miles ago ac and rad -8k miles ago. 

Any and all help is appreciated 

We know how important A/C is during these upcoming summer months, Ryan. Our team would like to connect with your dealership to learn more and assist how we are able. So that we can, please share your full VIN via email at [email protected]. We are keeping an eye out! By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.