Full heater core replacement (the easy way) on a 2007 GMC Sierra and similar models

Today we have a video of the full replacement process for a heater core on a 2007 GMC Sierra classic body style. The procedure is the same for many other GM trucks:
99-07 Chevrolet Silverado classic body style
99-06 GMC Yukon and Yukon XL
99-06 Cadillac Escalade (EXT, EVS)
99-06 Chevrolet Tahoe and Suburban
99-06 Chevrolet Avalanche
03-07 Hummer H2 (dash and firewall are a little different but the heater box is the same.)
It is easier than it looks, the dash has to come out, but it comes out as an assembly and only needs to be pulled back, not totally removed.
My website if you want to purchase a car or parts: www.vehcor.com
Amazon store: www.amazon.com/shop/vehcor
For Vehcor merch: teespring.com/stores/vehcor-3
#boringbuildfriday #heater

[@lsulschevy]

100% the best and easiest video on removing the dash. Watched it about 6 times and decided to tackle it myself. Got to the HVAC box in 2 hours. Saved me a lot of money too! Thank you!!

[@idahoprepper]

I don’t even need to make this repair, but for some reason I watched this entire video from start to finish! 😂

[@WaveAction777]

Saw a video by Car Wizard and he spent crazy time on how hard the job is to do, Vehcor in this video just does it and isn't there to hype how tough it is, rather that it is doable. Different mindset altogether.

[@michaelsmith-rh4yt]

Car wizard took a much harder approach to do the job

[@wallycleaver1046]

i was just wondering if the 99-2002 are more difficult, or was Car wizard just being a goofball!?

[@joecobb7383]

Best yet

[@ronp499]

It's all doable if you wanna do it.

[@Suds.]

Some people just like to exaggerate the difficulty, possibly to pad their ego and make themselves feel special.

[@erneststevenson3872]

What I like about your show is that you know exactly what to do in the exact sequence, like a heart surgeon. Keep sending these video's. We dont want you to forget anything!

[@jerryburdick8051]

I had the dash disassembled this far on my '03 Yukon. What you did in two hours took me just over six. But if I did it again I bet I could do it in...just over six. So much fun watching a pro do this.

[@ozziecrosby2092]

🤣

[@braddahryan]

Lol

[@ExploringCabinsandMines]

HAHAH funny ! I think I'm going to pay someone to do this

[@86Chevymontecarlo]

Did mines about two years ago on my 2000 Tahoe. As it was my first time doing this I took my time. About 12 hours total (taking photos, resting and learning when to walk away and calm down :-). If I have to do it again I figured I could do it in half that time. I made sure to replace everything else in there as well (evap core, actuators) since I had everything apart. I was not going back in there!

[@WatchWesWork]

What did you do with all the broken plastic tabs and clips? I like to put them in a bag and give them back to the customer. I don't want them to think I would steal from them...

[@vehcor]

No broken clips but they had a nice fresh bag of nuts and bolts that I “found”. 😂

[@billpar]

@@vehcor lol

[@Mishn0]

I think that's what they use to stuff hacky-sacks.

[@ericcasale7579]

😮😅😅

[@Sol-fi2ep]

Hands down the best video for the dash removal. Of all the videos I watched, this is the most straightforward and quickest way to go about it. I have an '02 suburban LT, so the only difference was taking out the seats and center console first, then the rest was the same. Thank you for saving me so much time and headache. This video is the best.

[@jamiedavis2588]

Heater core blew on my 2000 gmc sierra look at a few videos on KZbin and yours seemed the cleanest and easiest way to do it . After putting off for a couple of week I final managed to dive into it, and following you step by step made it not so confusing. Thank you for making these videos did it in about 6 hours including re taking out the heater unit because I trapped the antenna. I had no friends to help me as well . Not the hardest thing I’ve done but no walk in the park either . Your video help a lot

[@douglasfenbert1020]

Scott, we have always been moderately happy with you! You have proven to be a true force in being adequate. Keep up the work man, you're truly nominal!

[@muskokamike127]

epic left handed compliment ever lol btw: you forgot "you're as exciting as a bowl of plain oatmeal"

[@DonRRicks]

It’s nice to see Scott’s brother in law contribute.😂

[@MRCATWRENCH]

😂😂😂😂

[@alexandermckay8594]

Way better than a Ford of this era. Thanks for posting on a Sunday, Scott! A nice surprise.

[@vehcor]

It’s a Ford, they are supposed to be junked when the heater core goes out! 😂 I could not resist. I have not picked on Fords in a while!

[@peteconfar3914]

I have looked at other videos showing how to replace the heater core in the early 2000's GM trucks. All others illustrated way to many things coming apart, parts that didn't need to be removed. Your video was efficient and an incredible time savings vs other techniques of getting to the core. Thank You! This was a great video.

[@dougjones9493]

Remembering the really old days on some cars when you could change the heater core from under the hood. I'm sure they could design it now so you could change through the glove box opening, but that would take intelligent thinking.

[@vehcor]

Pepridge Farm remembers! 😂

[@dave1135]

I loved doing heater cores on a 80s Ford ranger, all under the hood, a few 8 mm screws on the cover, 2 hoses, and done. You could do one in 15 minutes.

[@mattcat231]

Yep, like the GM G-Body, couple screws on top, pull off half the hood seal, and slide it right on out, 10 minutes tops including refilling the antifreeze

[@bobroberts2371]

" but that would take intelligent thinking. " But that could also compromise the build of the vehicle. Move one thing and it affects many down the line.

[@markschommer7407]

@@mattcat231 Or a GM B-body. Still have 2 of these.

[@steveoh9838]

Did that a few years ago on my trusty 2000 model. Took me 8 hours, maybe 9 but has a full center console. I didn't disconnect the steering shaft or shift cabke which I see now why I couldnt pull the dash completely free. I pulled it back at an angle to gain access to the HVAC box, pulled the box back as well and barely had enough room to remove and replace the heater core and only because the heater core pipes actually swivel. Pain in the ass. Next time, heaven forbid, I,'ll pull the dash all the way out. There wasn't a video years ago showing the tricks. Great tutorial as usual. AAA PLUS!

[@foxyloon]

That's exactly why I love the GM-T800s. They're fairly easy to service, especially when compared to other vehicles. I'm surprised the top dash pad didn't come out in 1000 pieces like it did in my truck. Then again, 20 years of Florida sun isn't good for any piece of plastic.

[@mattcat231]

i definitely feel you there, this morning i had to change the rear passenger speaker in my 04 2500HD regular cab, and that whole post trim roof to floor came out in probably 15 pieces, i wasn't too happy.... but at least there's some less rattling from the speaker and that trim panel, lol! Now i can turn up the radio to cover the broken exhaust manifold bolt noise, lol

[@FinallyMe78]

I didn't realize I could take the hole thing out! You made it look so easy. I will be doing this at some point, so it is super nice to have a video to follow. Thanks!

[@briangibbs3774]

Really enjoy your videos. One thing that "Clean freaks" and all other frustrated perfectionists must learn: recognise when good enough is good enough.

[@navvet4518]

I did this to a Colorado that I bought. Evap and heater core were plugged solid. It was a good time to clean out and reseal the air box and blower wheel. What a difference!! Great video!

[@roberthamlin8414]

I'm an auto technician and your video is the best one out there. I learned a couple of tricks from this video that I will use on my next one

[@tedpuckett4181]

Enjoyed the steps in removing and replacing the heater core. I have a 2006 GMC with the 5.3 engine. I didn't know removing the dash was required to replace the heater core, hope mine never needs replaced. I have told several friends about your channel, so should be getting more subscribers. Good job Scott , look forward to other repairs on this truck.

[@ajfarms630]

Man I wished I would have took the time and searched for your video this morning I've had a heck of a time trying to replace my heater core. I wound up watching somebody else and I took my dash completely apart and still haven't been able to get to the AC box. Oh well Lord willing we all live and learn. By the way you did a really nice and neat job working on that truck!

[@jewllake]

it's not an easy job - but your video is the only one that actually makes me feel confident I can do it IF I ever have to.

[@RzVids]

Not a super job hard, just time consuming. Take your time, follow the video you'll be alright lol

[@petechatten-berry1865]

Awesome work! Brilliant content. Thank you Scott 👍🏻

[@johnkruer7557]

This is definitely the best video on how to do this job. Thanks for the video.

[@gtm7614]

Love your work. You have inspired me to do way more on my vehicles.

[@peytoncable7811]

You made this job a lot faster and easier than anyone on this site.

[@jwbnsfretired8805]

I really enjoyed this video, but then I like all of them. The sarcasm is great. I have an 05 Sierra with 230K miles. Been dreading that heater core, but not as much now.. I did replace that blend actuator on top of the box and that was a pain, but a well put together photo collection made that job much better. Thanks for your great videos!

[@duanebuck193]

Another super video showing removal, repair and reinstallation - thanks, Scott!

[@vehcor]

Thanks for watching!

[@BDKennels]

As the owner of an 05 Suburban I really appreciate the tutorial. Plus Sunday content. Win!

[@PMDW53]

Hey man, Just tackled this after watching your video - which is by far the best one. Trucks with the center console have to remove the front seats and console first... I had to use a bucket and step stool when removing the dash, but it was a lot more difficult getting it back in (no friends either, by myself) because It dropped and angled lower with the bucket. That dash is heavy! Thank you for your vid!

[@nmattcar]

one of my favorite dashboards from general motors.a very simple dash but everything is well laid out.thanks for the double video this week cheers from the nw suburbs of Chicago

[@thegreengiant777]

Great video. I was surprised to see it on today. Nice change up from your other great videos. More content like this and i think you will really grow your channel more. You deserve it.

[@charlesharnois3684]

Have done several of these, GM's, and Ford. You're right, take your time a good 1/4 drive set is a necessity. I also use a magnetic tray to hold the hardware. Excellent presentation this will help many people thanks!

[@woody95124]

Man you sure make it look eazy..But I know it's your knowledge on knowing wht to do...Your just darn good..

[@valley209tlk]

You made this job look so easy. Thanks for the video.

[@davidalder9392]

Awesome job....Thanks for sharing! This channel deserves the subs more than any!

[@davidwinklepleck1196]

Thank you for this video. I just had to do the heater core on my 2004 GMC dually SLT. Almost took more time to remove the seats and center console than the rest of the job. Great information.

[@jessesalazar5297]

Do you have to take the seats out to get the console out?

[@billpar]

Scott, you make this my favorite channel to watch, thank you, I always laugh at your humor its great

[@1966425]

Great job! I really enjoy your videos, very well done and explained.

[@davernon]

I have changed a few heater cores in my time, but never had to pull a dash. Interesting vid with no drama, but plenty of sarcasm, perfect !

[@alexanderlong4625]

Man this brings back memories of replacing onstar modules. Great video!

[@rickmarshall808]

Love watching your videos and your great sense of humor, makes you diff of the rest of the repair peeps on you-tube

[@houseofno]

"It was kind of a MESS when I got it..." - How did you know I was thinking that about my 1988 BMW 750iL when I first bought it in late 2005? Great job on the video and yes, my car's heater core replacement will be at least as involved as the heater core replacement on your truck. Thanks for another great video, Scotty!

[@Cruzomeda]

I'm moderately happy! To be honest, I am pretty proud of you for many reasons. Have a great day and I appreciate the content.

[@chaserimer4391]

Much appreciated on the video changed my first heater core in my 03 gmc sierra 2500hd with the 6.6 in about 2hrs after watching this for a couple of days and then going bit by bit while I was tearing it apart by far the best way I’ve found to change the heater core

[@chevyguy-hf1yq]

Scott is an absolute master of his craft. I am a clean freak, takes me twice as long.

[@terryboone6746]

Thank you for the video! I did the job start to finish in about 6 hours.

[@thunderbolt10031]

Ooo a Sunday post? I feel so honored! Love some GMT800 content!

[@vehcor]

👍🏻

[@rogerwiley7269]

With some deep counseling you may be able to make a friend. With any luck at all he will be a clean freak and help you detail some of those messy vehicles. Great videos.

[@TheAxeman2112]

Like your sense of humor. Having friends helps alot.

[@exibuchay1695]

That's amazing. It took you less than 10 minutes to get the heater core out. I am truly impressed. Actually I'm intimidated Beyond belief. You sure make it look easy. Even with the obvious editing to shorten the video. If I ever have to, I'll be back watching this video at least a hundred times. So you got that to look forward to. Thanks bro

[@MarkK01]

Wow 2 videos this weekend. Great Job. The last heater core I changed was on my 1978 Impala 2 door with the wrap around rear window. It was a lot easier then the new vehicles.

[@northwesttec]

Your version of doing this is way more logical and faster without taking apart extra stuff like some other people's vids do, Thanks

[@925rd]

Bud... You're a rockstar ! All these other informative videos are so long you just got straight to the point and if you're not smart enough to figure out what's in in between the lines , well it's going to take you a little longepr This man knows what he's talking about thank you!

[@johnds6621]

It's amazing that taking out the dashboard is the norm for heater core replacement. A $40 core and the rest is labor $1500. Thanks for the video.

[@bobroberts2371]

If everything was a 10 minute job with a hammer and worn out screwdriver, the vehicle would need to be 3x the size.

[@timlyons5320]

I did this on my '99 silverado 3 door. To early for youtube.. It took me a solid 8 hours of guess and unbolt, by myself. In the end all worked out, no rattles. Nice job to do it in 2 hours.

[@paultaylor9652]

Lovely Jubbly, his personality is what makes these videos great.

[@MrShayna14]

I watch your show all the time I think you’re a great mechanic

[@normalizedaudio2481]

I drive an 84 Ranger and changed my heater core in an hour. Nice to have such an easy job guys. You don't have to take out the dash. I'll put up with the faults. I never want to pull the dash.

[@landyr71]

Nice treat on a Saturday 👍🏼 good work as as always

[@patgeoffrey5072]

Great Video as always. Thanks. I especially like all the 2019 Sierra Denali vids.

[@johnpullman3227]

Great video documenting all the steps of taking the dash out. Thank you. Wouldn't this a great time to blow all the trash out of the AC evaporator and replace that fresh air door actuator hidden behind the air box that always dies at about 180000 miles. While you’re in there a new blower motor and thermocouple blower speed control would seem to make sense as well since you have to be a contortionist with tiny hands just to be able to reach those things later. Cheers

[@urfavhomie4sho]

Love the vids! Step by step means I'll buy a GM that year with bad heater core AND FIX IT!

[@kyl75]

Excellent and to the point video! Thanks man!

[@lecompterc83]

I’m impressed the a-pillar covers came on and off so easily. When I removed them on my Silverado that clips broke off and it was of to pick and pull to removed some more gently…

[@larryhunt632]

This is an awesome video. I would like to thank you for all the information.

[@clintpitney3918]

Thank you for posting this video! Very helpful.

[@LarryFopps]

Thanks for this. Just saved me $2,000. Got it done in 4.5 hours working at a very casual pace. Really isn't bad at all with your method. Thank you sir

[@alanhubbard1868]

Only You could make replacing a heater core look easy, Nice Job.

[@CA-lk6fd]

That’s what I love about this generation of GM trucks, fairly easy to work on. I’ve had a few of these trucks over the years, I have an 05’ Sierra crew cab Denali right now, sitting at 118k miles at this point. So far HVAC damper, and stepper motors on instrument cluster, I tackled those myself, not bad at all. Pretty good for a 16 year old truck!

[@MAGWolf]

older models you didn't have to tear the entire dash apart to get to the Heater cores. You could drop them out the bottom or they were behind the glove box. This new placement is pointless anti-consumer BS

[@CA-lk6fd]

@@MAGWolf I had an 89’ Camaro for several years, I had to replace the heater core once. It sucked, but I was able to take the dash board loose and slide it out just enough to get the old out and new one back in. It probably would’ve been easier to have taken the dash out. The newer ones are much worse to work on, they engineer that crap on purpose.

[@jamesfarnham1976]

Amazing job well done!

[@zogmontanastyle7348]

That was another great video, scott! Thank you again!

[@juniorbentley1985]

This guy is really gifted and talented Keep up the good work

[@robertsatterfield4324]

Thanks for the bonus video. I can't believe that R&R of a heater core could be interesting but it is.

[@marcosmaisterra4477]

Great video, as always, Scott.

[@fernandobravo8742]

Thanks for the video you saved me 700 dollars I followed your steps in the video the first time it cost me a little but the next round is a piece of cake

[@memoo4077]

Came here for a refresh because it’s been a while since I’ve done a gmt800 evap core….. subscribed for the sense of humor. 🤣🤣

[@garycurry4600]

Thank you for the Sunday bonus video!

[@vehcor]

No problem!

[@saxdogg69]

I like the repair vids. I need to do this job on my wrangler....been procrastinating for awhile....

[@thesniperofcs]

A bonus video is all I ever wanted🤠🤠

[@renemata5806]

Perfect job vehcor

[@kelvinmurphy9704]

You have a friend in me! 😂 Man, I enjoy watching your videos. I have learned so much. Thank you for sharing such valuable vidoes👍🏽👍🏽

[@jaysonabbatantuono2335]

Love these videos just like the boring builds. Keep em coming and kudos for drawing in the dirt for the clean freaks....laughed out loud at the beautiful taunting. Cheers!

[@johnmehaffey9953]

Nice to see how the manufacturers make it easy for the mechanics with simple repairs, good grief might as well build a complete new auto, front of the auto dismantled for a heater core , great post scott, ps I’ll be your friend Scott all the way over here in Ireland 😇

[@flatworm00]

Another job well done! That would have taken me forever.

[@XndeX]

From all the GMC trucks you have done, I bet you could have done this blindfolded ;) Another awesome vid Scott. Always appreciate a master at work.

[@roguebossa]

Damn dude, I had no idea! But this is as clear and concise as it can possibly be made, excellent job.

[@garyslemmonds7518]

Another great video! Thanks again!

[@vehcor]

Thanks!

[@rossryder944]

I had to replace a leaky evaporator on my 23 year old Silverado 2500 HD (it only had 130K miles). Decided to go ahead and do the heater core and those pesky actuators too. Replacing the actuators is a real gamble if they are not currently malfunctioning, but hey, I got married in Vegas, so... I watch many of your KZbins. Yes, you have friends.

[@rossryder944]

Also, your tips on this job were very useful. And I didn't really have too much trouble with that bolt behind the engine, using a flex head ratchet wrench.

[@russdoolittle5450]

Thanks for the extra video this week

[@michaelwebb4833]

Thanks for the extra video scott

[@blancamunoz8362]

Thanks for making it seem so easy! And I will be your friend any day!

[@danielslavy6694]

I have a 2002 Sierra and I have partially disassembled the dash to replace one actuator. Now I have to do it again to replace another. So I really felt your pain when you said they come bad from the factory. This will be the third one I have done and I hope that’s all of them.

[@johndrumm4270]

Thanks for the extra video this week. The pride in your work is something special that you don’t get to see in a whole lot of people in your field of work today.

[@NELSONG12]

Awesome! Great content

[@richardbrown8794]

Another great video.and once you realize the dash has to come out .it is what it is.. another great design GM

[@mrenfilade7178]

Whoa, unexpected Sunday vid -- way to go!

[@vehcor]

👍🏻

[@ahmadjamali2146]

Great work

[@kevinritchie9227]

Had to do that on my S10. Was supposed to have some assistance from a friend of mine but I got tired of waiting and just jumped into it. If you take your time and pay attention, its not hard. Also helped to have KZbin! I woke up from a nap to see you had posted this. I was really hoping I had fallen asleep and woke up on Friday. Shoot...

[@vehcor]

I just made it a four day weekend for everyone! 😂

[@futhermuckerson]

Bonus Sunday vid sweet!

[@vehcor]

Maybe Sunday will be my new upload day…. We’ll see!