2004 GMC Sierra 1500 AC Relay, Air Conditioning Fuses & Troubleshooting 

I've been without AC here in NC for over a year because I swapped in a bad AC clutch which melted the solenoid. After installing the new replacement clutch, my A/C was not working at all, so I was close to resigning to taking to a shop to swap out the whole compressor. When I found your video, I double checked all of the fuses and sure enough, the A/C compressor fuse was blown. Swapped it out, A/C works beautifully now. So thank you!

Now this is how you do a video! No added nonsense straight to core content. Thank you!

Hey, Thanks for this. Found out the AC relay was bad by replacing it with the horn relay and AC worked perfect. Now just need to buy a new relay. Saved me a more expensive trip to the mechanic…..kudos sir.

I liked the part explaining that the computer won't allow a'c to work if check engine light is on. Mines been on for 3 years but an additional problem could have caused it to come on again and since it's been on, I wouldn't know. Lot's of good info for such a short video.

Great video! My AC has been giving me issues and now I don’t feel the compressor turning on. Will start here. Thanks for the clear video with good visuals.

Thank you, I tapped my relay it came on. I though it was because it was because the freon was too low, I let some out the other day and it stopped working after that. I swapped the wiper and AC relay foe the time being I will see if my wipers stop now... I do have a slow feon leak that requires me to top it off every so often. Appreciate the video and help...

Thank you! Your video helped me fix my mother in laws AC and saved her $$$

this was a concise and informative video my AC buttons light up but nothings blowing. I'm going to try these steps

Great simple video a lot knowledge in such short time. Thx

AC worked great when last used 5 days ago. Today compressor comes on and the tubes get cold but the compressor does not stay on long enough, turns off then comes back on, never cooling enough. Suspecting freon but the Air was ice cold when last used. .?

Nice video man, I’ll check my fuses because I got in a new compressor but only the back vents blow cold air now and the driver and passenger vents blow normal air, with your video give me an idea where to start looking

Plug ac relay into horn slot and honk the horn to test it also😊

Thanks. Good tips

Great straight forward video

You are so cool man thank you for this information!

What does it mean when the driver side ac starts blowing heat but the passenger side stays blowing cool while both set on cold,I have to pull over turn off car then restart for it to reset!

2007 Classic Silverado Extended Cab the Low Service port is right on the dryer

Thank you so much! The video helped me a lot

Hello, What fuse is the temp gauge? I change my battery and now my temperature drops after a min or so. Thank u

Thanks

Is there a clutch relay on the firewall

Same for 01 4.3?

My ac comp 10 amp fuse keep blowing what could be the issue?

Thank you soooo much

Having this problem at the moment, nothing was working then switched the horn relay with ac relay and the air started blowing but it was fuming hot and still no power to the actual snowflake button or any other buttons? Anybody know anything?

03 Sierra does not have power in a/c and heater actuator (digital control)

Low side is the larger of the 2

Plug ac relay into horn slot and honk the horn to test it also😊