GMC Canyon Radiator Fan Running Wild With Engine Heat

I experienced similar symptoms on my 2013 GMC Sierra with the gas engine. The constant fan operation and overheating pointed to multiple issues in the cooling system. The diagnostic revealed the thermal switch was stuck in the on position, causing the fan motor to run continuously. However, this was just a symptom of a larger problem. The temperature control module had failed, which meant the cooling system wasnt receiving accurate temperature readings. During repair, they found the fan blade had developed hairline cracks, likely from the constant operation. The entire cooling system required a thorough inspection since continuous overheating can lead to more severe engine damage. This is considered a serious issue that needs immediate attention because: Continuous overheating risks engine damage, Failed temperature control affects fuel efficiency, Faulty fan operation strains the electrical system First steps should be: 1. Check coolant levels 2. Monitor temperature gauge behavior 3. Have the computer codes read 4. Get a professional cooling system inspection The sooner this is addressed, the better chance of preventing additional engine damage.

Thanks for sharing that detailed experience. Nearly identical issue happened to my Canyon last summer. Got it fixed after the fan motor was running non-stop and the cooling system started acting up. Really helpful to know about that temperature control module, thats exactly what ended up being the main culprit in my case too. Have you had any recurring issues since the repair? Curious about the cost too, as prices for cooling system components seem to vary quite a bit. My fan motor replacement plus labor came to around 400 Euro, but wondering if thats in line with what others paid.

Had the car at the mechanic last week for the recurring issues mentioned. They found a speed sensor was defective, which was causing the radiator fan to malfunction again. The total repair cost was 250 Euro, quite reasonable compared to the previous fan motor replacement. Happy to report the cooling system is now working perfectly after fixing both issues. The car overheating problems are completely resolved and the fan operates normally, no more constant running or strange noises. Engine temperature stays steady even during longer drives. If the thermal switch and fan motor repairs are done properly the first time, the system should work reliably. Just keep an eye on your temperature gauge for a while to ensure everything stays normal. Regular cooling system maintenance helps prevent these issues from coming back. The diagnostic codes can now distinguish between fan motor issues and sensor problems much better than before, which helps target the exact repair needed. This means more accurate fixes and potentially lower costs in the long run.

Thanks everyone for the helpful advice. I finally took my Canyon to the mechanic and got everything sorted out. The constant fan noise was driving me crazy, but they diagnosed it quickly. Turns out my car overheating issues were caused by both a faulty temperature sensor and a worn fan motor, pretty much exactly what others described. Total bill came to 580 Euro including parts and labor. While not cheap, it was worth fixing properly to prevent engine cooling problems down the road. The cooling system is working perfectly now, no more strange fan noises or temperature spikes. Really glad I got it checked when I did, as the mechanic mentioned it could have led to more serious engine damage if left unchecked. Lesson learned about not waiting too long when cooling issues first appear. The repair experience was much better this time with a shop that specializes in cooling system diagnostics. They even showed me the worn components and explained everything clearly.