Everything that can go wrong has gone wrong on my 04 Avalanche. I am now a certified mechanic thanks to GM & KZfaq.

I've been racking my brain trying to figure out what was wrong with my AC in my 04 Silverado. Thank you so much this fixed my problem!

I was struggling to get heat from my blazer with auto temp controls and this little routine did the trick so a huge thanks and anyone having issues with a GM auto temp system even as old as 1999, try this regardless of the issue because it just might fix it. And save you a trip to the shop.

Sir you save my life, six month working with that problem and fix in few minute for your video, thank

Perfect instructions! My Denali back to blowing Cold A/C. Keep up the great work, it’s very much appreciated Sir 😎

Thanks for the video! Battery died in my 2005 Tahoe and when I jump started it the a/c blew hot on the drivers side. I thought I was going to be replacing the actuator, but your easy to follow video helped me fix it!

Just tried it on my 03' Hummer H2, and it worked!!! Thank you so much! Haven't had heat on the drivers side in nearly 3 years after a battery replacement! :-)

Fixed my 2003 Avalanche thank you. I also had to replace the resistor which was easy to do. Fantastic to have heat again for winter.

Thank you!!! This fixed my GMC 2002 Sierra, I'm getting frigid air now. These type you tube videos are my first stop when I experience issues or questions how to repair things. I appreciate you taking the time to post this video.

I HAVE 2004 GMC DANALI IHAVE SAME PROBLEM AND I FOLLOW THIS GUY DIRECTION AND IT'S WORKS GREAT. THANK YOU VERY MUCH.

Man you are a life saver my battery went dead and my ac wasn’t working had no idea you had to do this thank you so much man

28° today and blowing ice cold followed your instructions and everything is working fine again thank you so much you save my life

Omg! Thank You I’m a grandmother of 4 grandsons and I was going to take them on vacation and needed this video desperately. I’m thankful for Your video & that I took time to really investigate. Oh it’s a 2007 GMC Yukon

2 yrs old video and it's the gift that keeps on giving !!! Thanks sooo much amigo!!! My 03 Yukon a/c was out but after this video we're ready for this South Texas summer... Thanks a million.. Definitely looking forward to more helpful videos!

What a great help…2006 Sierra worked like charm! Can’t imagine time I saved in my life! Live hundred miles from civilization and 20 below zero…nice having heat defrost!!! Thank you

Thank you for making this video I was about to pay a ton of money to the dealer with this video it fixed my passenger side issue I had on my 05 Escalade it stayed on heater only.

It worked. Have a 2004 GMC Sierra Truck with the same autotemp setup and center console, not something I was looking forward to disassembling. Turns out I didn't need to because of your video. Thanks for posting the step by step details showing all the areas to go with each step. It behaved exactly as you showed it would and I no longer feel like I'm driving through the Sahara desert on the driver side while the passenger sits in the Arctic.

My 2005 Tahoe went into theft deterrent mode when I pulled that fuse. Engine would start and immediately shut down on fuel cut off. It was easily reset by locking all doors with auto lock and then key opening the drivers door. Then the climate control reset worked as described. Thanks for sharing this procedure, it sure helped me!

It’s Saturday and got my battery changed and the AC worked through the defogger and floor but not through the vents. I took to a couple shops and all booked until Monday. Have to use 07 Chevy classic for work Sunday in the San Antonio heat🥵 Thank god I found your video here. All vents working and saved some serious $$$!!! Thanks brother.

Thank you very much for taking the time to post this video, it worked on my 2004 Silverado! One weird thing, after those steps it was putting out cool air out the defroster, I was worried and thought I would have to redo it. Then later in the day I restarted the engine and it somehow adjusted and blows perfect cold air....fixed!

i replaced every sensor and recharged twice , i even bought a new head unit for in the cab! and this shit worked! thank you so much man you saved the day one day before our vacation where its gonna be over 110

Thank you. On vacation in our 05 Avalanche today when the ac started blowing hot air (summer air). Saw that the compressor was running and dripping water so must have been the ducts. Found your video and worked! It didn’t cycle through the different vents but start blowing cold at the 74 reset. After restarting all the functions still worked. 🤘🏼

I was getting ready to put a new actuator on my 2003 Chevy Silverado. I ran accross your channel and this worked perfectly. Many thanks!

Thanks for video. My 06 Sierra with auto climate control was either ice cold on 60 or hot as hell on 61+. I even changed temp sensor in headliner. Now after doing what you showed it’s nice and cool still at 67. I was about to have mechanic tear dash out to replace all actuators.

Your instructions worked perfectly for my 2005 Yukon Denali. Thank you.

I know it’s been five years since you made this video but I just found it and I want to say thank you so much because it worked

Fixed my Dad’s ac in his truck, now he can go to dialysis without sweating in 90 degree heat. Thanks for this video

This seems to have worked! My truck was sitting for a few months while I did some other work on it, the battery totally died and everything was screwed up. The truck wouldn't even start until I did a hard reset of the system, then the HVAC was still all screwed up. Did this and all seems well now. Thx man!

Thank you! 2004 Yukon, 305K. Was looking for instructions on replacing blend door actuator. Found your vid and fixed it. I owe you one.

You the man! Im in Houston and its hot as hell trying to drive with just the windows down. My A/C is back! Thanks Dude.

Hey man, I just wanted to say thank you! I have an 05 sierra 1500 and after this winter the AC wasn't blowing anymore. I tried these instructions and it worked like a charm!

Helped get my AC back online. Thank you for taking time to make this video.

Thank you for taking time to made your research about this issue, I had a problem with my 2004 Tahoe, ac air blowing from everywhere but hot air from passenger side. I followed your instruction and fixed the problem in 5 minutes. Thank you for sharing!!!

Thank You! This worked! I have been frustrated with this issue for the past 4 months. Thanks Again! Great Video!

This worked on my 2000 Olds Bravada! Thank you very much, you saved me some big bucks!

Thank you! It’s 25 here today, real feel 4. Took 5 minutes to get the heat back!! Thank you!!!

Hey there,thanks for the great video,59 years old and still learning!will try on my 04 sierra

I have a 04 Yukon as my Patrol Vehicle and the AC suddenly went out on a hot Florida Day with no time to go to the garage and grab a spare... Budget cuts are a b$&@$ and there is no money to fix the AC....it has the manual AC setup and yet this still worked!!! Thanks so much!

Just tried it out on my 2013 avalanche.....works better than ever. Thanks

Wow. Thank you soo much! I was about to go to a shop to have it repaired and just to have someone look it was going to cost me $100. You just saved me from spending possibly hundredth of dollars. Thanks again! You're awesome!

THANK YOU VERY MUCH FOR YOUR HELP I HAD BEEN TOLD BY SEVERAL MECHANIC THAT THEY WOULD HAVE TO REMOVE THE DASH AND REPLACE THE ACTUATOR AT CONSIDERABLE COST. I HAVE DRIVEN ALL SUMMER IN TEXAS HEAT WITH THE HEAT COMING ON AT VARIOUS TIMES --- THANKS AGAIN !!!!!!!!!!

Thank you for taking the time to post this video 5 years ago. You just saved me $200 I would have spent on a new climate control unit. If you have some kind of account like PayPal, etc. posted I would gladly drop a few bucks. Thanks again!

Dude! We owe you some beers! Thanks for the video and best of luck!

Great simple 5 min fix that helped with drivers side blowing cold and passenger side blowing hot on my 05 Suburban thanks

Thank You. '03 GMC 2500hd. Had the batteries disconnected for 2 weeks doing injectors. Hvac did not work when I put it back together. You solved it for me. Really appreciate this. Again, thank you

Worked on my 2009 Silverado. Passenger side was stuck on cold. Fixed now. Thanks for the video

Just tried this on my 04 Sierra and it works perfect again. Thought I was going to be working on the system in the middle of winter but this solved the issues.

Huge Thankyou, 2003 Denali XL with 200k, these instructions have worked everytime.

Worked for me. 05 Cadillac escalade. Was about to put the actuator in, but this fixed it.. good shit. Thank you.

Came across this gem while trying to fix hot coolant problem in my 04 Sub so I’ll do this while I’m under there! Thank you!

Excellent! I removed some burned-out light bulbs in my climate control display and, like an idiot, I drove the vehicle without the unit installed. After reinstalling, everything was wonky. I used this re-calibration process and it worked perfectly. And thanks for giving credit as to where you got the information from. Nothing pisses me off more than to watch hijacked videos and the poster acting like it was their idea.

Thanks for your help. My HVAC isn't working and I'm going to try this glad to know I've got help online and I can do it myself

Wow thanks for the advice. It just came in handy for my 03 suburban. The rear blew super cold after calibration. The front still not so cold but it definitely worked for the rear.

Thank u... I just bought s 04 yukon and changed the battery... ac was hot on driver side... I pulled fused and waited.... I was freaking out... pissed because I just bought it... but thanks to ur vid I'm enjoy cold ac again. Subscribed!

Dude - you probably saved me 300 bucks - was going to take it to the shop - works good now cold when I want cold - heat when the old lady is in the truck

My late 2007 gmc Sierra was blowing hot air out the driver side to vents and ice cold out the passenger side I did what you showed in the video and now I got ice cold on both sides thanks for the video it helped

Thank you so much brother, I have a 2003 GMC Yukon only blowing Hot, saved me so much money. more blessings to you. !!

Thank you so much for this video. It was exactly what I needed to do to fix my problem.

This worked to perfection. Thanks for the step by step directions to reset the HVAC system

Worked for my 2004 tahoe! The heat wasn't as hot as it usually was. Thank you so much!

Omg!!! Just did this and it worked on My 2010 Chevy Tahoe, my driver side was putting out cold air, I followed the instructions and now I have heat. I know eventually I will have to replace actuator bit for now I have heat!!!!! Awesome video brother

This seems to be working on my 2003 GMC Sierra 2500HD. Thanks for the help!

Bro your a life safer it’s currently 12 plus degrees in Texas and my heater stopped working did that and not gona lie thought it was bs but man you came in clutch thank you my man 💪🏼

It took me all afternoon, and I had to unhook the negative battery terminal for an hour, but this worked. thank you.

Thank you for posting this video it worked for my 2004 Tahoe. Perfect step by step.

Awesome video man!!!! This problem has been causing me pain all summer in my 2010 Silverado so glad I found this video

I tried this on my 2014 Yukon Denali XL after changing the blower motor module and it worked like a charm. Thanks!

Thank you , tried it and it fixed my 03 Sierra 1500HD You got yourself a new subscriber

I was about to write a negative comment but come to find out I did it wrong.. IT WORKED 🎉

I just repaired my A/C automatic blend motor assembly by disassembling the unit, inspected the gears, inspected the large final drive gear and its copper fingers that slide on the variable resistor pad. I put more tension on the copper fingers and used the surplus lube from inside and applied it to the gears. Reinstalled the unit and started my 2012 GMC Sierra with the A/C on, varied the temp setting cold to hot and back again, IT WORKS! Just my time and no parts.

Both a good and helpful presentation. It worked for my two Envoy's. Fuses were located differently than the Yukon but all the same once you get the correct fuse.

Worked, my 04 was only blowing cold air here in Iowa February. Heat is back!

Thanks so much for the video! This helped my truck go back to normal operation! Thanks

Worked perfectly on 2003 Silverado. THanks

2005 suburban worked like a champ thank you very much for your time

HELL YES MY FRIEND. Did it while I watched. Same results as you. High Five.

Man. I’m going to buy you a Christmas and birthday present this year. Thanks 👍

Yoo your the man bro! , I was going crazy tryna figure this out. Works in mins thank you !

Bro I saw this like a year ago and never tried it till today thank God u exist brother I'm subscribed

Praise God! Thank you for this video!!! Just did it and it's now running through the recalibration 🙏😎

Thanks I just got my truck fixed 👉👍I’m in ny and I neeed the heat thanks to you so simple video you made.very simple and effective 💪🏼👍 you are the man homie

Great detailed description. Appreciate this. Hope it's my issue for Bi_level issue (no vent - floor/defrost only) 👍

That’s one of the best videos ever you just saved me some mon not to mention the headache of taking the dash apart it helped mine start working

I didn't know that Jack Osborne worked on ACs! ;) Great info...thanks for the post. FYI: The rear blend door is notorious for breaking. The replacement is expensive and prone to the same problem but one can be made out of steel fairly easily.

Dude, you are awesome! For years our 03 Yukon XL only blew hot air when set at 90°. One click down to 89 or any lower and it went to straight cold, no in between. This fixed it! Thanks a million!

Much appreciated. Fixed the issue with all my heater buttons not working at all.

Thanks for taking the time to put that out there👍

Worked for me! 03 Silverado.. Thanks man!

Worked great on my 04 Escalade thanks a ton for sharing. Much easier than last time around when I actually replaced the blend door actuator (and probably did not need to!)

You are amazing, dude it worked. Mine did not say the 74 degrees thing, and didn't cycle through modes but it worked. !

Worked with my 05 Suburban. Thanks!

Worked on my 2006 gmc Sierra! Thank you!

You, sir, just saved me a whole lot of aggravation. Thanks a million.

Worked like a charm...... 2005 Chevy Tahoe....Thank You!!!!!

You are the MAN 🤘🏾🤘🏾🤘🏾 2020 This fix worked on my 2004 Yukon Denali. Thanks a million times 😁

Thank you! This problem has been vexing me for some time, and at least for the moment, it is resolved!

Thanks so much, my ac was pumping 80 degrees on a 70 degree day this fixed it

Kudos! I have a 2010 GMC Delali, and this absolutely fixed the issue I had with my Auto system. Was blowing hot on drivers side and working properly on passenger side. I followed your steps here and it is fixed it so far! Took a few mile test ride adjusting the controls on and off, hot and cold over and over again, and it works! Thanks for saving me a high dollar repair!

Heck yeah my friend, heats working properly again! Thank you 🍻

I have 05 Silverado 1500 with manual controls and the fuse removal reset worked perfectly today.