How To Install Replace Blower Motor Resistor 02-09 Chevy Trailblazer

[@1AAuto]

√ *Watch the Video* √ *Buy The Part at 1A Auto* 1aau.to/m/Visit-1AAuto √ *Do it Yourself* √ *Save Money*

[@reneephillips9203]

Great video! My 2003 Envoy had the same issues. I was able to find the part. After watching video, I was able to change it myself! Local repair shop told me it would be about $700 because they had to pull dash out, so here I went searching on the internet. It's been 2 years now and still running strong!

[@netwrkops]

I just used this video to replace mine and its now working. #5 speed hasn't worked for years and now it is working again. Thanks guys, its all good.

[@1AAuto]

Thank you for watching. Glad to be of help. Please let us know how the repair comes out! 1aauto.com 888-844-3393

[@DanielRichards644]

number 5 is the only one that works for me

[@ovrlyfocusd]

This was a 5 min fix after watching this video. Love this channel.

[@1AAuto]

If you have lost some of the lower heat settings, it may be the blower motor resistor.

[@jenniferstarnes661]

This was a great video for a single mom with an almost 16 year old daughter who doesn't have tons of funds, I bought the part and replaced it myself and everything works great again.

[@1AAuto]

+Jennifer Starnes You're welcome! We're glad to hear that we were able to help you save some cash and get the job done yourself. That's exactly why we make these videos. 1aauto.com?KZbin&CTA%20Comment&ATony 866-403-3393

[@jusbkool]

Thanks for the video.....really helped. I also needed to remove the Glovebox door (3 screws) and that gave me a lot more room to work with.

[@sstrainingsolutions3832]

Thank you for making this video. My 06' Trailblazer's blower decided to quit yesterday during the polar vortex. Took a chance on this being the culprit and indeed it was. Be sure to check the wiring on the new Transistor as the one I purchased was manufactured with the cords too short. We spliced them with the old one & installed it. Back to keeping me warm!

[@mondkonigin586]

Thank you gosh, everyone was saying AC compressor. Hubby refused to believe, that is when we found your helpful video. Coldest setting never worked then put of no where AC/Heat went down, just like we read in the comment below. Hubby switched out resistor and viola we have all AC/Heat. Thank you

[@cameronakins1924]

Thank you - super helpful. Chevy TB Ext 04 - Rear AC did not work when I purchased truck and lost speed 5 about 3 months ago - then lost all speeds - used your video and got to resistor and it was melted together with 7 wire harness. Purchased a 7 wire harness pigtail and spliced to new resistor - extra butt connectors were needed - all 5 speeds working and rear ac working now too! Can't thank you enough!

[@1AAuto]

Thanks for watching. 1aauto.com 888-844-3393

[@bellaspringirth2247]

1AAuto guys - Thanks for the video. My 2002 Trailblazer fan wasn't working on 1 -2 - 3. 4 and 5 was ok. A $11 part and 20 mins of my novice level labor fixed the problem, thanks to your video! Kudos!

[@1AAuto]

+Bella Springirth Thanks for watching. If any of our viewers needs to make this repair, we carry the auto repair part shown in this video on our website. Here is a link to them www.1aauto.com/1A/HeatingandACControls/Chevy/Trailblazer/1AACD00001?KZbin&CTA+Comment&Be61A67ltP4

[@jsinclair658]

Thank you! for this video. My 2005 Trailblazer has the manual switch and the part is slightly different but the process is the same for replacement. My air was not working at all on any speeds. I removed the resistor and one end wire was melted. The wiring harness was also either melted or fused to the old resistor and would not separate so I cut each wire one by one and crimped them to a new harness with the supplied connectors. After replacing the resistor and wiring harness, my air now works perfectly on all speeds. Your video is the best one on KZbin for replacing these parts. I especially appreciated you providing the socket sizes to use..that was a time saver and made the repair even easier. 5 Stars *****

[@1AAuto]

Thank you for watching! 888-844-3393

[@1AAuto]

Thank you for watching! 888-844-3393

[@corey978]

Sometimes you can get away with grabbing the resistor wires and giving it a shake not a permanent solution but gets the job done

[@mikesmall3562]

Hi,thanks for this video. On my '03 Trailblazer the fan stays on FULL BLAST even when the ignition is turned off. Pulling the fuse has been my SOLUTION for a year now. I'll be taking care of this problem ASAP! Thanks!

[@michaelstark9939]

Doing it tomorrow.. sadly, I cant beat your year lol

[@1AAuto]

You may want to check the AC compressor to see if it's kicking off and on when the AC is on in the Truck. If it is it could be low on refrigerant. Hope this helps you out.

[@gbeckley]

Thanks very much for the video, it helped a bunch. Truth be told, the hardest part of the entire replacement (besides contorting myself) was getting the wiring harnesses out of the lower panel!

[@1AAuto]

You only have one blower motor resistor. That may be the culprit, but I can't say for certain that it is. Usually when they go bad you loose the lower speeds, maybe on your the higher speed decided to fail. With electrical stuff anything's possible.

[@jm00199]

My son has a 2006 Trailblazer LS. The fan motor stopped while on fan speed 5. The blower motor proved good. Thanks to the video, we found both the resistor and the wiring harness plug overheated. We replaced both parts. Now, the fan runs at a full fan speed 5, regardless of speed settings at switch and will not shut off when ignition is off! Seems to be a process of elimination to reward my son with warmth in this cold season. Please send Good News that there is a cure after all with this vehicle!

[@1AAuto]

You may want to take a look at you blower motor resistor. Usually when they start to fail you start to loose some of the speed settings one-by-one.

[@LBasham41]

Thanks for the video....I know nothing about cars, but the instructions were easy enough so I could fix my own problem. You saved me a lot of money. Thanks.

[@1AAuto]

@TheKirkenjerk Usually when the blower motor resistor goes bad you lose the lower settings. It may be a bad resistor.

[@1AAuto]

You should be able to just plug into the new one what you unplugged from the old one. Hope this helps you out.

[@1AAuto]

it sounds as if you might have a few different issues. It could be a mixture of a bad blower motor and also possibly some bad actuators inside the HVAC system. You will want to bring this in to a local shop for a full diagnoses.

[@onenikkione]

hp 11208 needs to be replaced if you can't get the fan (heat or a/c) to come on....great vid....thanks for posting...really helped out

[@gregbrown9765]

Great video. If you don't wait until dark like I did this is easily a 10 min fix .

[@1AAuto]

+Greg Brown We're glad the video helped you out. Thanks for watching. 1aauto.com 866-403-3393

[@redchevy1957]

I have a 03 TBlzer LT, the blower motor only on 5. is this part is what I need to change. thx.

[@Rebel9668]

My 2008 Trailblazer has a problem with the blower motor turning on by itself when the engine is off, the key is out and it is just sitting. It will run a while and shut off. It does not have automatic climate control, just the basic one. Would that be a resistor problem or a control module problem?

[@1AAuto]

+Rebel9668 There could be multiple reasons why you're having this particular problem. We suggest taking your vehicle to a nearby reputable shop to identify the cause. Once you know the cause, we'll be happy to see if we carry the parts and how-to videos needed for your repair.

[@michaelstark9939]

Check the blower motor fuse, if that looks good, change the resistor.. (Just my personal opinion based on my knowledge and experience)

[@bud29ful]

Can thank you enough. Excellent description and directions. Had it done in about 45 minutes.

[@1AAuto]

Sometimes a resistor can heat up and melt the plug that plugs into the resistor. If that happens it's a good idea to replace it.

[@1AAuto]

@nyaj5478 Many times when you start to loose the speed settings on your panel, it's caused by a bad blower motor resistor.

[@1AAuto]

You may want to check the actuator to see if it's working ok.

[@bigjakeburke]

Thank you! Instructions and video were great and only took me 20 minutes to complete. Great job!

[@jimo68]

Nice video. I have a 2005 chevy trailblazer with this issue. I only had fan speeds 1,2 left. Ordered the replacement resistor for $26 (shipping + tax) online. My neighbor helped me replace the part. We were able to clean the prongs on the wiring harness that had some melted plastic on them. All is good. Have all my fan speeds back.

[@1AAuto]

Thank you for watching! 888-844-3393

[@mfposoab]

Hey thabks for the vid. Did it just today. Looks like a quick fix but with the clips and the splicing its about an hour to fix start to finish. Thanks again!

[@justinhour3879]

thankyou i had to buy a whole new wiring harness mine melted to the old part. got it done in thirty minutes. keep the videos posting!!!!

[@monstermondragon]

You are so the man! I owe you a beer! This worked out so easy, my wife did it with me! 17 minutes!

[@LadyCatAnne]

This video showed us how to entirely fix the problem in my trailblazer, thank you, thank you, thank you!

[@Akumpula]

Thank you for posting this! Just bought a brand new blower and now I need the resistor.

[@ltldrmrboy]

Thanks for the video and the advice. It took all of 20 minutes to replace and it works perfect! Thanks again.

[@brocksamson212]

hahahaha oh god man. This fixed so many oddities with my trailblazers AC When I was idle the AC did not work, and the AC only worked on 4-5 As well as the AC would still run when the car was turned off. Thank you very much for the video.

[@1AAuto]

Thank you for watching! Glad to be of help. Please let us know how the repair turns out. 1aauto.com 888-844-3393

[@1AAuto]

If you have lost most of the heat settings, usually this is a sign that the blower motor resistor is going bad.

[@johndillalogue8941]

wonderful informative Tube ,2008 Trailblazer ,only low fan. Replaced the Resister(GM has modified the part ,be nice to see a update) had to make splices and reconnect ,all went great , thanks so much you walked me through it!!

[@frankparks]

I have a 2003 Trailblazer and the speed control acts on 4 & 5 but not 1,2 or 3. Is this a issue with the blower motor resistor? If so how much does this component cost?

[@JohnsonBayLo]

Well I know for a fact you saved me cash. I can install my resistor with no problem myself(2004 Chevy Trailblazer).. But it seems that I have extra cords or missing cords... I wonder if I really need them or not.

[@ernestoserrano946]

Need your help wondering if if this will help my issue. I'm not able to control the speed out of my vents and when I turn the trailblazer off the heating seems to continue on.

[@Xenon676]

Mine is a manual temp control. Which has a plug that goes into the resistor. When the resistor blew. The wire got hot and melted the casing of the resistor and part of the plug plastic together. Any idea how I get the two part now?

[@KevinCody1964]

I've a 96 Blazer, is the resistor in the same place,pls? all the C/heat speeds work except the very highest and it was 109 here today so thanks for this video. Best regards

[@sellemt]

The website says that 3 wires need to be spliced. I have ATC so would the replacement include splicing or does it fit like this video?

[@unified95]

So I have an 06 Trailblazer LT with automatic AC, everything was working fine until today when the blower doesn't work on any settings, manual level or Auto, air recycle or defrost, the blower just doesn't go. I'll try first the blower resistor like in the video, but if doesn't fix it, what's next to check? the motor itself?

[@Greg_Carter304]

I've replaced this no joke 4 times already in a 4 year period. I've even replaced the blower itself and resistor. Still keeps happening

[@1AAuto]

+Greg Carter Thanks for watching. If any of our viewers needs to make this repair, we carry the auto repair part shown in this video on our website. Here is a link to them www.1aauto.com/1A/HeatingandACControls/Chevy/Trailblazer/1AACD00001?KZbin&CTA+Comment&Be61A67ltP4

[@Greg_Carter304]

1A Auto Parts I can't keep buying parts though. I need to fix it once and for all... Any help. Would be appreciated

[@oscartoledo2581]

I noticed the part in the video is not the same part that the link take you to because the old part only has 3 pins & the part the link takes you to has more then only 3 pins for the connector? Im wondering because im looking to get the right part the one with 3 pin connector everywhere else they all only got the one with more then 3 pins & not the one with only 3

[@jrosen07]

02 Bravada, same chassis. Front blower does not respond (work) to console commands, but rear seat blower console works fine -- hot air, for example. Should I just swap the blower motor behind the glove box by itself, or swap the resistor as well? Maybe check the relay first? Thanks -- great video

[@1AAuto]

You should test the power to the blower motor with an ohm meter or a test light to see if there's power going to the blower motor. If there isn't, then check the fuse to see if it's good. Hope this helps you out. 1aauto.com 888-844-3393

[@jordlorach]

Thanks for the video i replace my B-resistor on my 2006 trailblazer EXT but i notice the black cable on the connector was kind of burn. do u think was cause by the old resistor? or should i check the completed wire system?

[@commencents]

Keep in mind you don't need to go through the glove box I did mine all from under the dash easier I think.

[@1AAuto]

+Kevin Dailey Thanks for watching. If any of our viewers needs to make this repair, we carry the replacement blower motor module shown in this video on our website. Here's a link to them www.1aauto.com/1A/HeatingandACControls/Chevy/Trailblazer/1AACD00001?KZbin&CTA%20Comment&

[@kooldesign4u]

Thanks for the tip.

[@DanielRichards644]

he did that for filming visibility

[@markdinkel9006]

The resistor I bought at auto parts store was different . It had 3 loose wires . How do I hook them up ? Just match color coated wires to original trailblazer wiring ?

[@markdinkel9006]

You must be an expert. I had to do both & autozone gave me a different resistor than the one I need. WTH ?

[@JohnsonBayLo]

Can I send you a short video of the piece I'm talking about because I want to make sure I don't need anything else before I buy my blower motor resistor.

[@johnbeach1178]

Great video and an easy fix that I should've done a year ago. Hope you keep making the videos.

[@1AAuto]

+John Beach We're glad the video helped you out. We're definitely gonna keep the videos coming. 1aauto.com 866-403-3393

[@cozettacarroll5238]

I fix my car by myself thanks to thanks to you , it was easy and I say me money

[@redaalsaiog]

hi, I have 2002 TB, the fan doesn't work sometimes and when it works just too low even when the control monitor on the higher speed. do I need to replace the Resistor as shows on this video?

[@1AAuto]

It could be the blower motor resistor that might be going bad.

[@TheIndustrialrocker]

It kicks on. Its fully charged. Sometimes when my ac would start up there would be this squeling coming from the fans. Now the fans won't come on and there is voltage going to it.

[@DenoKeller]

1A Auto Parts - I have a 2003 Chevy Trailblazer EXT and the front controls all work fine and my problem is the rear fan for the AC/Heat , It is not working at all !? Any suggestions or am I looking at the solution and need to replace the blower resistor ? Thank you for any help or suggestions !

[@1AAuto]

@TheKirkenjerk On the resistor.

[@user-jt2hb8jb5l]

Would the resistor stop the blower motor from working?

[@alex21131]

I have a 2004 Trailblazer and my fan works except at the 5th speed would that part you replaced in the video be what I need?

[@ronda33]

Thanks for the video -2008 Trailblazer with auto temp unit - blower quit working on all speeds. How do I diagnose whether I need to replace the Resistor or Motor - or both??

[@daphneevans5054]

Did you ever figure this out? Having same problem with mine

[@Ben762x51]

Good video. I have a 2001 blazer, and the fan selector (as in selecting face, feet, etc) won't switch. It is stuck on the face setting. the heat, and fan works fine, but I can't choose any other setting. Any idea on what this could be/how to fix? Thanks

[@JoRob525]

Thanks for the video, It was perfect. Helped me identify and fix my 2002 Trailblazer fan issue. And only took like 15 mins. part was 30 bucks at autozone.

[@1AAuto]

You might have two different issues going on here. Usually when you start to loose the speed settings it's the blower motor resistor that needs to be replaced. If the vent is stuck on defrost there might be a broke, loose or disconnected vacuum line around the firewall or on the motor, you may also want to check under the dash too. It could also be a bad actuator in the system. 1aauto.com 888-844-3393

[@MJTechChannel]

Hi! I have the same issue, my ac blower would stop working on the 5TH speed. Then quickly after I noticed the issue, now it won't work at all, meaning non of the speed 1-5. However, when I am driving and I turn the ac on I can feel some cold air coming in! Do you think this is the speed control resistor?

[@Leopoldo-V87]

Mine is doing the same thing?

[@funmaker2747]

@@Leopoldo-V87 mine too

[@n1njas]

Hello, thanks for the video. I have a similar issue. My '04 Chevy Trailblazer ext has an issue with the fan. AC stopped working a long time ago but now the fan won't even work. If I put it on 1, 2, 3, 4, 5...it won't turn on. However, sometimes, if I put it on 5 right away it will turn on and work for a bit. I looked up the problem and ended up going to buy a resistor (has a green square thing on top) and trying to replace it now..hope I'm doing the right thing and that it's that part? thanks

[@JaiDaSurf3r07]

I have a 02 Chevy Trailblazer and my ac/heater won't work unless its on full blast. Is this what I need to replace?

[@mjolnir5.012]

My girlfriends fan only works on the "5" setting, will this help fix this issue?

[@i3sm3]

Hi I recently replaced the blower motor resistor and the connector harness and at first it worked fine on all speeds for about 45 mins, but now it's only working on speed 5. Would I have have to replace the fan switch?

[@1AAuto]

You may want to take a look at it to see if it's working correctly. 1aauto.com 888-844-3393

[@angelgeraldofotografia6901]

Hello, i would like to ask you a question, i have a trailblazer 02, and the module is the same you show in your video, but now this module resistor is discontinued, and there are a new one with more pines, so i would to know how to change from the old version to the new one, thanks in advance

[@hp11208]

how do i know when the resistor goes bad

[@kendrageorge8674]

The bolt to get resistor off what size was it what size bolt remover I need

[@1AAuto]

There is normally a resistor with that as well that can cause a trickle of power to the motor. It sounds like you might have a few issue compacting each other at this time

[@demarques1911]

My resistor only has a 2 bolt flange ..2002 trailblazer ls... cant find it anywhere... everybody sales the 4 bolt flange

[@JuanCapuchino]

i have a 1993 cadillac fleetwood, i normally keep the fuse out for the hvac spot in the fuse box, but when ever the fuse is in, my a/c stays on but always blows on high speed, i can never control the speed, only the temp. ever since that problem, my car over heats faster than before, please help

[@1AAuto]

You may want to see if the door actuator is working correctly inside of the tube. There also may be something that's clogging it, preventing the air flow.

[@TheKirkenjerk]

I am having a hard time understanding this. All the air settings work up to 4 (out of 5) so thats 1,2,3,4. But as soon as I turn it to 5 the air stops coming threw. Now your saying that if its a bad "Blower Motor Resistor" I would lose the lower power settings i.e, 1-3ish. But because im losing the higher power settings its not the "Blower Motor Resistor" but a completely different resistor instead?

[@ricosuave170]

The blower on my 05 Trailblazer keeps running after the car is off. I had to discount the battery for it to turn off. Does that mean the blower control module need to be replace

[@erikarodriguez997]

Hi, Im working on a 2005 Trail Blazer, The AC was working at full capacity but not blowing air in the front position, so the AC Control Assembly was replaced with an OEM part, Now the AC will not cool at all. The AC System, Freon level normal but still no cold air. Any suggestions?

[@hodaddy2424]

i have a 2007 trailblazer LT with auto temp. i turn on the truck the and fan comes on, sometimes i can adujust the speeds but usually the speed stays the same even with the control on full blast and sometimes jumps to full blast and then back down to slower spped. when i turn the truck off the fan still runs for a few seconds or a minute. i try turning thr truck back on and off to stop it and even turn the fan off and the turn engine off but it will still run for a few, what could be the problem

[@chanchonino]

Awesome thanks! saved me from getting robbed at the dealership!

[@quinones325]

I have a 2003 chevy trailblazer ext. When I try to turn on the heat nothing happens. How can I tell if I need to replace the motor resistor or motor fan assembly. Thanks for any info you can give me.

[@1AAuto]

You could test the power at the blower motor resistor, and at the blower motor when the switch is turned on. If there's power going to them, the blower motor, or resistor may be bad. Hope this helps you out. 1aauto.com 866-403-3393

[@prisonmike7550]

I changed out the battery on my 2005 Trailblazer aprox. 500 miles ago. I don't drive it very often, but just last night all 5 speeds on the temp. control stopped working. I watched another video about disconnecting the battery and the side effects it has on the HVAC actuators. Would this be the same problem or is it two totally different issues?

[@1AAuto]

Thank you for watching. It sounds like 2 separate issues. Please let us know how the repair comes out! 1aauto.com 888-844-3393

[@jennifershatley9427]

My mom has 2004 Trailblazer and the heat has stopped working. She has no heat or defosters. Could the problem be same part you replaced in this video? She does not have the digital thermostat like in the video.

[@1AAuto]

It could be, you may also want to check the fuses and see if there's power going to the switch and also to the blower motor and the resister, if everything checks out okay. 1aauto.com 888-844-3393

[@deisen39]

I Have a 2006 trailblazer with the a/c speed control not working on the highest setting. It works on all the lower settings, just not the 5th speed. The heater also doesn't work on this speed as well, but it does on all the others. What could be the cause of this?

[@annepoveromo6367]

I have a 2007 Trailblazer. Blower works on #2 and #5. Would this be the correct part to replace and fix?

[@1AAuto]

+Anne Poveromo It may be. Usually when the blower motor resistor goes you'll start to loose the fan speeds. Here's a link to the replacement part shown in this video if any of our viewers needs to make this repair. www.1aauto.com/1A/HeatingandACControls/Chevy/Trailblazer/1AACD00001?KZbin&CTA%20Comment&ATony

[@mml1224]

great vid!! i bot the part on amazon/ from china I.......hav a blazer 2003, that i just replaced the resistor motor, not blower, and it worked, but cycled off after 3minutes...i have to keep hitting auto mode or one of the options for it to start again...........did i have to caliberate the part? please help.

[@TheIndustrialrocker]

I have a 95 Chevy S 10 and my fans for my A/C went out. I can feel it make cold air but I have no fans and the blower doesn't start. What could be causing that. A/C is a must in the louisiana heat.

[@soljwf5664]

I own a 2008 Chevy Trailblazer. When I turn the dial past 3 on the heater/ac it cuts out, does that indicate my resistor is out and needs replacing or is it another problem?

[@soljwf5664]

cool thanks I'll have to look into that

[@rapnamepercysnow]

@1aauto I'm having a mode switch problem, the a/c works but only blows through the feet and defrost vents, do I need to replace the resistor?

[@ItsthePittsfrom81-83]

Thank You ! Exactly what was wrong. Great vid. Keep them coming.

[@TheKirkenjerk]

@1aauto The blower motor resistor? Or another resistor all together?

[@jasonperfumo4836]

Anyone know what to do if the resistor is discontinued? My 2002 trailblazer auto climate blower resistor is no longer available. Is there a way to by pass it?

[@cherylgilpatrick4480]

I am going to replace this part myself because only speed 5 works right now and its getting cold!! lol. S thanks for the video on how to. But my secondary issue is that when I turn the speed dial on the engine in my trailblazer seems to die a bit, some times worse than other times. Could the blower resistor malfunction cause that at well? It doesn't do it when I use anything else electrical. Thanks in advance for your input.

[@1AAuto]

It's actually totally normal to hear your engine sort of die down a bit. It's because there's a load put on the engine to help power those accessories. If it's very dramatic, it could indicate that the alternator is dying out. But it's common to experience that in most vehicles. Hope this helps. 1aauto.com?KZbin&CTA%20Comment&ATony 866-403-3393

[@cherylgilpatrick4480]

Thank you and yes its quite drastic and I was thinking alternator. A garage said they determined the alternator was fine but I am not so sure they knew what they were talking about, lol. Thank you for the advice. I will replace this part first to take care of my one-speed heat and go from there. Thanks again.

[@tdawg82182]

I have a 03 and my air blows at the top and bottom vents but "NOT" the front vents! It also only blows on speeds 1-4 "ONLY"!!! On speed 5 it just turns off. Will changing this resistor fix the problem? Please HELP!!! It's hot as hell where I live lol...

[@starletbrooks4017]

my front heat only works on setting 2 the back heat only blows cold air out. what do you think the problem is

[@1AAuto]

A lot of times when you start to loose the speed settings your blower motor resistor might have gone bad. Hope this helps you out. 1aauto.com