AC Compressor for LS
 

Hey guys, hope this is in the right section. Im swapping a 5.3 from a 2000 Tahoe into my 69 c20. I am replacing the AC Compressor and was trying to figure out if all the ls compressors pretty much are the same. I found this one from amazon that fits an 05 silverado but looks to be the same as far as the lines. Can someone please confirm if this would work or not.
https://www.amazon.com/dp/B000C984Z2...d=2P0O4SY1KI7F

Heres a pic of my stock one if it helps. Only difference i can see is mine has a pressure switch on the back which im not going to be using anyway.
Attachment 1684251

Re: AC Compressor for LS
 

No they are not. At some point they switched to a variable compressor. You need the non-variable. If you are going vintage air they finally have one that will mount on a ls. I have a non variable gm stock ls compressor with my vintage air... pain to get right but works fine. None of their fill volumes were right.

Re: AC Compressor for LS
 

Thanks for the response. . I have read that the truck compressors were fixed displacement. Im more so worried if this will bolt up to my motor and run on the stock belt. I mean they look the same, but i cant find any answers in my search. .

Also im running an old air system that has been in my truck for a number of years now. just plannin to have the hose ends changed to work with the LS compressor.

Re: AC Compressor for LS
 

I believe it might be when they went to the 4th gen that they went to the variable displacement. Vintage air doesn't have a new compressor. They are using the tried and true universal sanden compressor. They designed some brackets to bolt it in the stock location. Between the brackets and the Sanden, you would be in for 3-400 depending on where you purchased the compressor from.

Re: AC Compressor for LS
 

Thanks thats what im trying to avoid. . I did all the work of moving my motor mount and such to keep the compressor low and stock to avoid buying a bunch of brackets. . the reason im looking at this compressor is it is only 160 bucks shipped and doesnt have the pressure switch on the back, plus has the right line ports for the lines i have. Im a little lacking of knowledge here. . 05 is not Gen 4 correct? this compressor shows to fit mainly 03-09 vehicles and a few 2017's.

thanks again

Re: AC Compressor for LS
 

4th gen did start in 05. But the variable displacement compressor may have started in 03. Bet if you called the dealer they could tell you

Re: AC Compressor for LS
 

Ah i didnt even think of that for some reason. . okay i will call the dealer. .one other thing. can you confirm that this one would bolt into my stock bracket?

Re: AC Compressor for LS
 

I'm almost certain that it will bolt on. Pretty sure the parts guy at the dealer will confirm that also

Re: AC Compressor for LS
 

Thanks for the help. ill call the dealer and post up my findings in case anyone else finds it useful

Re: AC Compressor for LS
 

Bump....

Bumping for a question or saving for later?
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Re: AC Compressor for LS
 

Well, you said 2.5 years ago you would follow up with info.

Just a friendly reminder. 😉

My bad lol. I will post up compressor I went with tomorrow when I have my records in front of me.
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Re: AC Compressor for LS
 

Based on my findings from calling the dealer and online searching I went with an ACDELCO 1520941. It bolted up to my stock 2000 LS bracket and has done well for me... the clutch wiring was pointing toward the side rather than back so it cleared my motor mount better. I have an old air Hurrican AC unit in my truck and my blower motor went out recently but up until then, my ac has been working well and once the blower is replaced I expect it will work well again.

Re: AC Compressor for LS
 

Is that the 10S17F or the 10S20F?

Thanks!!

Sorry again for the delay. Holidays made it a bit hard. Popped my hood and snapped this pic for ya. 20f
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Re: AC Compressor for LS
 

Cool. I grabbed a 10S20F unit from a wrecked 2005 Tahoe with rear air. Had fun modifying the Hooker engine mounts to clear it. Their instructions said "minor trimming", what a joke. I had to punch a 3/4" hole in the Hooker mount to clear the compressor, along with cutting the rear off the stock compressor bracket.

Already bought the AC adapters for the compressor.

Now I just gotta get the fittings and hoses to go from the compressor to the condenser and to the accumulator.

Re: AC Compressor for LS
 

any pic of the mods to the mounts? sounds like a lot.

I finally pulled the trigger and ordered the replacement blower motor since summer is just around the corner. gonna get hot real soon.

Re: AC Compressor for LS
 

No pics, but there is a rear knob on the compressor that hits the Hooker mount. A step bit was needed to make a 3/4" hole to clear the compressor.

Re: AC Compressor for LS
 

Which mounts are you refering to. I had called and spoke to Holley about their Hooker Blackheart LS swap mounts for 67-72 (PN BHS511) and was told it would work with the stock LS compressor. Now you have me second guessing that. Love to get this working and mounted low out of the way like you did. Where was the hole in the mount needed? I am trying to understand where the compressor is hitting. If I understood your precious post you ground the knob down, if ao what is still hitting?

My donor is a 2005 GMC Yukon XL so I am hoping I am lucky and have the 10S20F on it (haven't pulled the motor yet) and I can run it with a Vintage Air system.

Re: AC Compressor for LS
 

I can confirm that the latest Hooker Blackheart engine stands when used in combination with their F body style engine mounts clear the ac bracket and compressor without modifications.

Re: AC Compressor for LS
 

Thanks for the confirmation. By F body do you mean the clam shell style mount (P/N 71221018HKR)?

Re: AC Compressor for LS
 

That’s it