Love how deliberate and clear your instructions are for each step. Most people probably have a very limited understanding of how an A/C system works. So without clear instruction it's easy to get confused and make mistakes. Thank you for doing this!

well done young man , and thank you for answering the many questions that people had , I am 71 years young and still have my 91 GMC short box and still do my own work , thank you again .

Probably one of the best tutorial educational automotive videos I’ve watched yet. Answered so many questions in just this one video.

Thank you so much for doing it step by step. I was not going to change my condenser but your video just made me do it. Pulling vacuum as I'm typing. My 1988 gmc will have ac today. You rock 100% support your videos.

Great video! I was able to completely rebuild and retrofit the ac system in my 1990 silverado k1500 by the Grace of God and the how to knowledge shown here. Thank you! Keep it up!!

Just a NOTE worthy note. When connecting the hoses to the ports High and Low, to open the system, the knobs need to be rotated clockwise which presses on the Schrader valve to OPEN the system and counterclockwise to close the system.

Awesome video 👍 just finished redoing my entire A/C system with new parts thanks to your video.

Thank you. This is terrific. I had no idea whether or not I'd be even capable of doing this sort of job. I'm glad I looked it up. Now I'm quite sure that I can do it. And so.....maybe I'll get my A/C back. I'm unlikely to pay a pro to do it. There are better things to spend that money on. But I just might do it myself now.

One of the clearest and easy to understand video's i have seen...thank you...

Just changed out my 1989 GMC 1500 AC. Your video was a great help. Thank you.

I Have watched a couple of your videos, and they are very helpful. I have a 1988 short bed 350, 700 r4 that I have owned since 1998. It is a good truck ,but I could have done a better job of keeping it up. With your help I am going to restore it .

Great video I have all of the same parts to go on my 1988 K1500. This is just what I needed, Thanks, PH

Nicely done. I've used this video a lot while rebuilding my entire HVAC system in my 1995 Chevy Silverado. I went way further. I removed my dash and rebuilt my air box. That would be a good video to have.

Wow Great Job! I am ready to do my 1988 Chevy C1500, Well after my nap and getting the parts. I'm only 83.

BTW my 90 silverado k1500 originally had the 1st design system in it and the knowledge in this video helped me to convert to the 2nd design which is much easier to find parts for. Thanks again!!

Best video I've seen ever doing a ac system..Thanks a million

What a supreme video! Easiest video to follow ever!!!

Great explanation it was very clear and concise! I wish more explained things as well as you did.

This video walk through really helped me with my 94 C1500. I ended up replacing everything except the evaporator behind the dash. Took me 6 hours in all, but saved me loads of money! I tried to remove the old orifice to see what it was like, and I couldn't even pull it out of the condenser. I cut the tube area in half and it was plugged up! No wonder the system failed! No flow! The only difference in the way I had to recharge mine and the recharge shown here is that the Freon canisters today have a resealable can, which in the video has the old style piercing valve. After I vacuumed the system and closing the quick connections at High and Low ports being careful not to allow any air back in the system. I had to recharge mine through the Low pressure port as if topping it off. Remember YOU MUST PURGE the short hose while connecting to the port to prevent air back in the system. The vacuum in the system took about 2 cans before I needed to start the truck. You must burnish the shaft/clutch when you start it up. If there is enough Freon in the system to engage the clutch during start up, the instructions indicate turning the AC on/off at least a dozen times to burnish the clutch shaft. Then I proceeded to put the remaining Freon in the system. So the back story to my situation here is the first compressor I bought from Auto Zone went bad! After about 3 days driving and a couple hour drive to camp for the weekend, the bearing was squealing like a banshee! I ended up changing it out and returned for warranty replacement. What a PIA! Fingers crossed! So far still cold! Thank you again for this video. Like many DIY'ers, we just need that reassurance sometimes that we are on the right track in doing the project.

You sir,have the best video out there on this!!! I'm currently doing a '93 sierra!

I have a 92 K2500 with 6.2 Detriot that did not come with an AC system from the factodirection. Previous owner lived in Cananda and did not need AC. I live in North Florida and DEFINITELY need AC! I had no idea what all I would need to do to install one, but this definitely steers me in the right direction.

Great video I’m going to try to replace my ac system as soon as my parts come in

Also for the benefit of your viewers, there were 2 slightly different setups in 1990. Unlike yours, mine had a slightly different condenser and a two piece liquid line which houses the orifice tube right at the joint in the two liquid lines. I highly recommend converting it to the condenser that houses the orifice tube and replace the liquid line with the version that you used. I had already installed the condenser only to discover that the orifice housing had been bulged inward, likely from corrosion buildup between the nut and line. I couldn't even get the old orifice out. I had to call GM to get a part number for that line and found that it was discontinued with no available aftermarket replacement. I'm sure that the parts house would have taken the condenser back in exchange for orificed version, but I had already reinstalled the grille. Fortunately, I was able to restore the end of that liquid line to its original shape using a large tapered punch and successfully flush the line and replace the orifice tube.

Awesome job on the instructions! Thanks

Excellent advice and video! Thanks very much.

Great video. I am going to follow this as if it were my bible. Thanks again and keep up the good work.

I think this little guy could fix anything!

Thanks for a killer video! Can’t wait to have cold ac!

Great Video. You are a savior! I’m putting together a 1993 Chevy k1500 Blazer and I was lost on where to go with replacing the AC system. Very clear and exact video! You’ve got a new subscriber.

Great video !

AWESOME STUFF! Thank you!!

Thanks you , awesome video !!!!!!

Very well done.

excellent job

Enjoy your videos

Muy buena la explicacion gracia

Great video! But u need some loom for them exposed wires and also will make it look cleaner😊

Would be nice to see the new system run! Use a thermometer to see how cold the air comes out.

The only reason I was looking at this video was to find the trick to take the compressor rat without removing the clutch. That was cleverly bypassed, and the hard part of the job was already done clutch on this one we're working with is rusted and frozen I guess I'll cut the bolts.

Good video, but wearing safety glasses when working on AC systems is always wise.

good job on the video. One thing I noticed is the orifice tube was installed backwards. I believe the side with the smaller screen is supposed to be inserted first.

Good stuff

Whats up thanks for the resourceful video, i was able to install the ac, but i had a question the next day after the install i turn on the ac and it leaked all the ac gas, im assuming i probably didn’t connect the ac pressure switch cables right. One has a letter A and another B, can you let me know which one is power and the other ground? Please and thanks in advance.

Yeah I just did a R134a compressor on my 94 S10 blazer last week and man what a different I used a new AC Delco R134a compressor and it does make a difference on what compressor you use.don't use a cheap aftermarket compressor.

Came acroos your videos this weekend. Very well done. Definitely answered a few questions I had. What site do you use to get your parts?

Very helpful, currently working on my a/c. Same model truck. With a completely new and dry system. How many Oz of peg oil is needed. I can't seem to find a solid answer on this. Thanks.

Why does my 94 have the standard r134 fill connect I've been trying too get my ac going but my clutch won't engage I thought it was bc it was outta freon so I tried filling it it read empty and when I squeezed the trigger it went too over filled but I didn't hardly put any freon in lol

I replaced the evaporator core. It turns out that I had to remove the dash after all. It wasn't too bad. Anyhow, I vacuumed the system but waited to charge it until I got a retrofit low pressure switch. I figured that your 3 can weights should be really close so I used two full cans and my two partials from my previous attempts. I had already returned the manifold tool so I used the little screw on tool with a trigger and built in gauge. It turns out that the trigger was going bad so I had keep repeatedly squeezing it to get it all dispensed. I called my wife to pick up a new one and another can of r 134 as she was on her way home from work. I figured I still needed about two ounces but when I hooked up the next can with the new properly functioning dispenser and gauge, it showed 55 lbs of pressure so I didn't give it any more. It's definitely functioning well now, but I feel like it could be a tinge cooler. Can you go by the pressure? The 55 psi is in the yellow part of the gauge. Does that mean it's slightly overcharged?

Subscribed

Thank you for the video. I was wondering what made you decide not to change the Evaporator Core?

I can't seem to find any information about what "part" the line from the dryer leading into the fire wall at the beginning of the video is... I plan on replacing everything you did in this video, but I couldn't help but be curious as to what it is.

When adding oil to the compressor os it necessary to rotate?

Great instructional video sir. For the high pressure switch I'm wondering where the original lead comes from. Mine is completely missing

If I had to fix a leak would it be necessary to add oil to the system as well when recharging it? Amazing video, wish I'd had it a year ago lol.

Great DIY vid. Now subscribed, but with a question. Every step was quite clear and well explained but video time lapsed forward at the point where refrigerant cans had to be swapped during the fill process. So, my question is: Are the lines (valves) left open or are they closed as each new can of refrigerant is connected to be drawn into the system?

Hey brother....I love watching your vidz......What is your first name...?? Im Steve...I have a 1988 K 1500 4x4 The Off Road Edition half ton with a beefed up suspension....Why does your engine compartment look like its brand new cuz mine looks old and grungy....lol.....My AC hasnt worked in about 6 years,,,, but thats about to change cuz youve inspired me that I can do this job myself Ive got all the parts except im just waiting on the lquid line and the condensor to come in....this truck is going to my nephew when I pass and I want it to blow ice cubes for him. Thanks and PEACE Brother

Thank you for the video, but I have a question I bought a whole replacement kit with compressor and and condenser but my old unit doesn’t have an orifice tube and neither does the new condenser, will it still work or should I send it back and get one with an orifice tube?

Suburban Ranch need help on my 92. I don't see any wiring for the high-pressure switch.

Ken Moore - again. I am trying to convert my 87 GMC R1500 pickup. The old or original R4 it did not have the high pressure switch as your 88 does. So the video shows you with a one wire that you are switching to the two wire required. So have searched the internet for days but nothing shown on where or how to wire the hi pressure cut out switch. So wondering if I can use a dual hi/lo switch on accumulator, but what do I do with the hi pressure switch in the R4, your video shows the low pressure connector going back on the compressor clutch switch. So my dilemna is what do I do with the hi pressure wiring. I know one goes to the ground but where is the other wire supposed to go? Thanks, Enjoy your videos

Need a video on replacing both power steering lines, mine got crushed in recent crash…

Where do I get the Accumulator mounted R-134a Low side switch and part number. Have looked online to no avail. I'm converting 87 GMC pickup and have ordered all the parts except can't find this part. This is an excellent presentation and thanks for posting this. Thanks KM

Hey I bought everything you listed and I am going to do the complete change out like you did. Question: do you know what the size and length of the ac compressor bolts? My truck is missing these bolts. I bought it with the bypass pulley on it.

What if I don’t have the valve for the can all I have is the connection for the low side with a gauge for the Freon

I feel like you left out a few things at the end like do you close low port valve between changes of cans and how much psi do we need total and is it possible to allow more air into system if we drain the can too much

Does it difference if i put tge oil only in the compressor

I’m terribly grateful for your video, I’m going to do the entire system on my 91 454 Silverado, I do plan to reuse my lines and just to assure myself, you’d recommend using the “pro flush” on all reused components? And blowing out residue with compressed air? Thank you sir

My 1985 c10 4.3l v6 ac really vibrates the truck when the ac is on. Does anyone have an ac mount hack?

I need your help!!! The spacer you used on the ac line I didn’t see the part number in the description .. and is it completely necessary, I bought a new ac delco one that came with two black washers , do I need the green one?

Hi. What vehicle did you base your parts search on? 1994 model? Some of the parts give several options and I want to be sure to get correct parts.

Which of all these parts can be reused when converting? Im assuming there are some that are recommended to change out but maybe not necessary. The quote I got to have a shop do this seems way low compared to the price of these parts so I'm wondering if that meant they were only replacing certain things.

O rings lube with mineral oil. pag oil attract moisture and then the aluminum will corrode. I know this because it happened

I can't get my lines to seal at the back of the compressor new lines, and compressor, they sent 4 diff seals...can't get them to hold, lines seem stepped any suggestions? Edit just watched this very informative. Thank you brother...think I was missing the pilot, 🤞 let's hope it passes the damn leak test this time. Bout frustrated w this one. 😂

I feel like I gotta do the same thing with my 98 Sonoma possibly at least I think tho probably look at it some more see if I need to do more than I think. If that makes sense lol.

Couple quetstions.. 1. If i do same kind of renovation like you and put refrigerant oil on system before assemble... Does the oil came out if i make a vacumation, or still holds in system? And question two.. Do i have to remove old schrader valves on low and high ports before i mount retrofit r134a coupling set? They had a own valves..

I see you mention that you install the green O-rings , do they come with those or that’s something you do

Ufff💨💯💪

Question. Is there any O-rings under the dash that may not be compatible to the new freon? Thanks.

Ok so my factory AC compressor hose fitting was flush and now the new one I have it one thin and one thick like yours where did you get the gaskets, only 2 thin gasket came with the compressor….

When charging the system, is it a 2lb fill in addition to the 8 ounces of oil, or 2lbs total with oil and refrigerant?

None of these part numbers match the part numbers that come up on auto zone when i put in my year make and model. Is this some custom swap or are these part numbers for r134a components? I need to get the ac going in my 93 and it’s r12

Why not show operating pressures and vent temp? Oh and open the garage door for ventilation

How long does it take to install the compressor, condenser, and all the related lines?

You think that accumulator joint will fit a 1989 chevy c1500 looks the same just can't find one but this one ?

What’s the accumulator pressure cut-off switch for the retrofit r134. I can’t find it anywhere! If you don’t mind telling me. Thanks.

Do you happen to have a part number for that short extension you used on the compressor line thanks

Can you use the ac pro refrigerant for it. So all you have to do is put it into the low side service value until its full?

When they change my fuel pump out in my 98 GMC 350 engine four-wheel-drive truck I don’t know what they did but when I go to get gas and top my tank off gas comes out from one of the pipes onto the ground is there any way to fix that without removing the tank..? this is over a year ago if so please let me know. Thanks

I’m not sure if you said it in the video and I just missed it but how much did this entire swap cost you ?

would you happen to know the part number for the bracket that the compressor is mounted on? specifically for an 89 c2500 5.7 liter

I need ac in my 88 s/10 2.5 5 speed will this method work

I have a very important question sir. I have a '93 GMC Sierra 5.7 that I'm doing same thing to it and following your instructions exactly. Only I have one big problem with the high pressure switch. There is NO WIRE present!!! I've looked through the wiring harness. Still no wire. What can I do to wire my HP switch? Can I run a wire off the LP switch? Fuse box? Or will just any 12 volt supply work? Cannot find a video on this problem. Your insight and expertise would be greatly appreciated!!!

I did this on my 90 without the benefit of this video. I added all 8 ounces of oil directly to the compressor and am now having trouble getting the system to take any more than 6 ounces of r134. I also didn't realize the need to retrofit the low pressure switch on the dryer. Do I need to disassemble and redistribute the oil? Or can I just replace the low pressure switch? It seems like it's building too much pressure on the low side. (Boy I wish I'd found this video earlier. I've had such trouble finding information for this year and you seem to have it all- even the washers and extension for the compressor ports. I used two greens with a machine bushing and o ring on the one side to even them.)

Do you know if the condenser you listed fit a 89? Rock auto says 90 and up.

So I didn’t add any oil to any parts when I changed the compressor or the dryer I was told it came with oil already in it. Is this bad? I’m also changing out the condenser now

what’s the difference between the two a/c refrigerant… or i should ask why switch is one colder than the other?

Gee thanks guy the only question I had and you didn't answer it..... HOW DO I GET THE BOLS PAST THE AC

Well…crap needing to replace my o -tube did not know I had to pull the grill.

Hey the switch u installed in the back of unit, is it required to have it???…

My 1 wire pressure switch is completely missing how do I rerun that whole wire for the one that goes on the compressor

Hi, the short extension you used on the compressor line {6559423} I can't locate. Can you please tell me where you purchased the short extension part. I have put the number in at Rock Auto and it doesn't recognize.