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Finding the right A/C compressor when it's serial number is gone


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shushi_boi
Novice

May 27, 2022, 3:56 PM

Post #1 of 19 (312 views)
post icon Finding the right A/C compressor when it's serial number is gone Sign In

Hello,

I recently ordered an A/C compressor kit for my truck from Rockauto, but it turns out that the A/C compressor is slightly different from the original, in that the bolts are the same, it's just that the original had two wire harness connections, one in the front where the belt pulley is located, and another one in the back of the unit, however the new one that I ordered only had the front wire connection.

To give more details, my truck is a 1996 Chevrolet 1500 Silverado
Info from truck (the vehicle manual is missing, I bought the truck used),

Vin: (Not sure if it's recommended that I write it but I will provide it if requested)
Model: C10753
Motor Info: CFC 5.0L TGM5.0HPG1EK TGM1098AYMBA

Additional information from vin decoder,
Model: GMT-400
Body Class: Pickup
Series: Conventional Cab
Gross Vehicle Weight Rating: Class 2E: 6,001 - 7,000 lb (2,722 - 3,175 kg)
Displacement (CC): 5000
Displacement (CI): 305.1187204736
Engine Displacement (L): 5
Engine Configuration: V-SHAPED
Drive Type: 4x2
Cylinders: 8
Primary Fuel Type: Gasoline
Fuel Delivery / Fuel Injection Type: MULTIPOINT FUEL INJECTION (MPFI)
Engine Manufacturer: WRN
Plant Information: NA-Canada - Truck, OSHAWA TRUCK, ONTARIO, CANADA

When I ordered the compressor kit in Rockauto, I ordered it under
Chevrolet > 1996 > C1500 PICKUP > 5.0L V8
and the compressor was,
GPD 6511340 {15112552, 19151514, 89018948} [A/C Compressor] Prefilled w/ OE-Specified Oil

I contacted Rockauto customer service and they told me that I chose the wrong part and that I needed to reselect from their catalogue inventory, other than that they were not of much help. So it seems that the new compressor that I ordered was a Sanden compressor, and there are actually a few different compressors that were used for this truck model for the same year, which includes Sanden, SD7H17, H6, and HT6. However after rechecking the listing (specifically looking at the images available) most of them that had images of the back side of the units didn't seem to have the electrical wire connection harness that my original compressor has in the back.

And having rechecked the original compressor, it's serial number is unfortunately erased, and the new compressor that I had ordered (the Sanden) doesn't have the extra wiring harness connection anywhere, I even remove some nut covers around it just to check if it was covered up, but no it seems that they were just oil drain nuts.

I don't have access to alldata, prodemand nor identifix in the moment, but is there any way for me to find the right compressor for my truck? Thank you again for your time!

I have included some images, hopefully they will be helpful

http://autoforums.carjunky.com/photos/pic/669jYHMC/1932.jpg

http://autoforums.carjunky.com/photos/pic/669jYHMC/1931.jpg

http://autoforums.carjunky.com/photos/pic/669jYHMC/1933.jpg

http://autoforums.carjunky.com/photos/pic/669jYHMC/1934.jpg

http://autoforums.carjunky.com/photos/pic/669jYHMC/1935.jpg


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 27, 2022, 4:29 PM

Post #2 of 19 (299 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

The one you have would probably work if the wiring would reach.

Yours has a switch in the back and the replacement will have a place to transfer the switch over to the new one. The unit you have has the switch in a different location which may or may not be a problem.

The Delco part number for the one you need is 15-22124
Rock Auto has it for $224.79. You will still have to transfer the switch to the new one. Be very careful removing it. After removing the snap ring, rock it back and forth while gently pulling on it.

Remove the snap rig and plug in the new one and insert the switch in there.

Whenever there is a Compressor failure you should always look for the cause of the failure. There is usually a reason and you should replace the condenser also because all the debris from the bad compressor landed in there and it cannot be flushed out.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

May 27, 2022, 4:33 PM

Post #3 of 19 (293 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

Didn't read it all I think I know what the issue is. Rear is a plug not to be left. You swap that over with the one you have and re-use that. It makes it quit if overpressure or overheats.

Different look it may be a Sanden comes with washers works better than Delphi ones that were OE on most.

Betcha?

Tom



shushi_boi
Novice

May 27, 2022, 4:42 PM

Post #4 of 19 (287 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

I appreciate the answers, and I didn't know that the switch/wiring harness in the back could be transferred from the old one to the new one, I'll try that, and carefully remove the snap rings, I'll check to see if there's a youtube tutorial just to be on the safe side! Wink


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 27, 2022, 4:54 PM

Post #5 of 19 (277 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

You still may have the wrong compressor so I would get to the bottom of that before installing it. There are other issues to be concerned with like the pulley style and position and the position of the plug. Even the hose mounting pad could be different.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



shushi_boi
Novice

May 27, 2022, 6:23 PM

Post #6 of 19 (261 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In


In Reply To
You still may have the wrong compressor so I would get to the bottom of that before installing it. There are other issues to be concerned with like the pulley style and position and the position of the plug. Even the hose mounting pad could be different.


Thank you for your suggestions, I will check those (it seems that the pulley 6 groves are the same and the mounting pad is the same shape, but I will double check before installing it), and if I wanted to know if my compressor (I'm assuming it is the low side since it's on the compressor) A/C pressure Switch is good and doesn't need replacement, how would I go about testing it? Is just a continuity test with it disconnected good enough or would it need an ohms reading as well? And if it is bad, how would I go about replacing that one as well? What part number would I look for? It has 2 terminals on it.


(This post was edited by shushi_boi on May 27, 2022, 6:26 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 27, 2022, 6:38 PM

Post #7 of 19 (252 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

I would still advise you to get to correct compressor. That one is obviously different. That switch could be either high or low and there may be even a difference in the switch.

If you want to order a switch just order by application from the parts house.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



shushi_boi
Novice

May 27, 2022, 9:22 PM

Post #8 of 19 (241 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

I sincerely appreciate your help and I will do that instead (replacing the Sanden compressor that I mistakenly bought with the 1522124 recommendation that you made).

I think I found the compressor pressure switch under,
CHEVROLET > 1996 > C1500 PICKUP > 5.0L V8 > Electrical-Switch & Relay > Refrigerant Pressure Switch

there were a couple, but after removing the pressure switch from the original old compressor, this one looks the most similar

Link deleted

but this one is a Low Cut-Out type (Operate Psi Low Off = 44, Operate Psi Low On = 51), where there are some that are other types like; Cooling Fan type (Operate Psi Med Off = 160 Operate Psi Med On = 250; or Operate Psi Med Off = 210 Operate Psi Med On = 280; or Operate Psi Med Off = 230 Operate Psi Med On = 275) or Pressure type (Operate Psi High Off = 430 Operate Psi High On = 200)

This one seems promising too, but it's manual seems to suggest that this was made specifically for a different compressor than the one you recommended
Link deleted

Out of all of the Refrigerant Pressure Switches, which type would you recommend for the 1522124 compressor that you recommended?

Other than that, I was curious if you had any specifications available for this compressor? such as tightening bolt specs (of the 4 compressor mount hole bolts), Condenser lines, and the A/C Receiver Drier / Accumulator lines [I've got a crowfoot flare torque wrench tool for minisplits]. Also, would you know the A/C Oil Specifications for my truck? Thanks again for all of your help!


(This post was edited by Hammer Time on May 28, 2022, 5:39 AM)


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

May 28, 2022, 4:58 AM

Post #9 of 19 (220 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

IMO - Sanden is the best replacement. Delphi or OE ones leaked out shaft seals in no time if weather changes wildly temp wise. The Sandens usually require 4 washers or placement will be off. If not they didn't come with it ask why not.

Sandens do not require changing wires - don't do that! It's not a pressure switch rather it senses temp is what the pressure is!! That' not me guessing know that from a college professor of HVAC, Marvin E.

OMG know that or get out of the kitchen! Sorry - no offense this is primal any computer hook ups will do the calculus for you doesn't say that in plain English you are supposed to know it,

Tom


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 28, 2022, 5:44 AM

Post #10 of 19 (211 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

OK, first off, stop posting links to other sites. They are not allowed here.

I do not agree that Sanden is the best way to go. The Delco unit is the OEM unit and the one you should be staying with.

Also, stop trying to match up switches. They may look alike but they are very different. The pressures are different, the plugs are different. The color is important.

Order a switch by application only.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



shushi_boi
Novice

May 28, 2022, 7:50 AM

Post #11 of 19 (204 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

What do you mean by "Order a switch by application only."? What is a application? And where would I do this?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 28, 2022, 7:58 AM

Post #12 of 19 (196 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

By application means look up by Year, make, model and engine size from a accurate parts supplier catalog, not like Amazon or Ebay.

If you see multiple options/differences for the same application, then you are looking in the wrong place. There is only one correct application for that vehicle.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on May 28, 2022, 7:59 AM)


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

May 28, 2022, 8:12 AM

Post #13 of 19 (192 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

Do you have your old compressor? Take that one and if exact size (it should be) get that size for either compressor or one listed to fit.

This shouldn't be this hard it's so dang common a unit unless some strange version made for use only in Mexico or Canada I wouldn't know.

Trucks I doubt made for export to mess you up but were in N. American formats only thing I know of was metric for kilometers or in miles there's nothing else I've ever known of different. All should have stickers of info under the hood could be a pest to dupe those from GM if missing.

Other if you replace compressor you really should also replace "O" tube while system is down it's behind FR directional lens just two T-15 screws by memory. Can be removed with a sheet rock screw.

I've worked on tons of these simple as simple gets.

Trouble are the common crap - lines froze up and bust or a hell of a wait with PB, time and good luck they might if you end up needing a manifold set hoses and all IDK availability if it messes up now but sure because it's a truck they'll make those too forever.

Read stickers it should take 32oz if a truck and more for the non trucks (Tahoe etc.) that are trucks not sure why probably larger condenser + evap but shouldn't be necessary quite yet for this?? It's old, anything could mess this up but compressor alone I've never seen any that didn't fit these if so I'm lost - it was altered for a reason IDK why anyone would?

T


shushi_boi
Novice

May 28, 2022, 9:00 AM

Post #14 of 19 (180 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

Thank you guys for your answers, but I think I will be sticking with the OEM unit on this one, to be on the safe side, and yeah this truck was made in Canada so I'm not sure if that played a role in creating variety among the similar GM trucks from this year.

In regards to what you said Hammer Time, I checked RockAuto and it gives me different pressure switches options for the application of
CHEVROLET > 1996 > C1500 PICKUP > 5.0L V8 > Electrical-Switch & Relay > Refrigerant Pressure Switch

Since RockAuto doesn't give me more specific information to the Delco unit (which is the OEM unit; 1522124 compressor), is there another supplier catalog that you use to find the accurate parts that I would need? As I mentioned before, I'm finding different pressure switches options (like Low Cut-Out type, Cooling Fan type, Pressure type) for the same make, model, year, and engine size of my truck.


(This post was edited by shushi_boi on May 28, 2022, 9:16 AM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 28, 2022, 9:56 AM

Post #15 of 19 (171 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

This switch is called a "high pressure cutout switch" but you still have to see pictures of it because this truck apparently used two different systems. On the other system the switch is in the high pressure line which would make it a different switch.

There are also other pressure switches in the system to make it confusing when ordering one.
It doesn't appear Rock auto even carries this one.

Looking around I have found a few that all appear to be blue. You would need to verify the plug design.

I saw them on Ebay and Advance site using this search
Refrigerant high pressure cutout switch for 1996 Chev 1500 5.0L



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on May 28, 2022, 10:02 AM)


shushi_boi
Novice

May 28, 2022, 10:41 AM

Post #16 of 19 (166 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

Thanks!

After a little searching myself, I checked gmparts website that lists everything for this exact truck, including the compressor that you mentioned. There are two compressor switches that this catalogue lists which are

GM Genuine Parts Air Conditioning Clutch Cycling Switch
GM Part # 52465555
ACDelco Part # 15-2832

GM Genuine Parts Air Conditioning Clutch Cycling Switch
GM Part # 52466358
ACDelco Part # 15-2962

after reading more info on them, here's more details about these parts,

15-2832
Amperage Rating: 3.5 A
Height: 1.3 in
Length: 2.5 in
Voltage: 14 Volts
Weight: 0.07 lb
Width: 1.7 in

15-2962
Amperage Rating: 3.5 A
Minimum Activation Pressure: 22 PSI
Height: 1.1 in
Length: 2.4 in
Voltage: 12 VDC
Weight: 0.05 lb
Width: 1.5 in

The 15-2832 is odd because it operates with 14v, no sites lists its operating pressures/temps, and some of the sites have suggested that this goes to the accumulator.

I've measure the dimensions of my original pressure sensor and these were its dimensions based on a digital caliper that I used,

Height: 1.10 in (all the unit)
Height: 0.45 in (just the sensor portion)
Width: 0.87 in (of sensor portion)
Width: 0.53 in (of wire connector portion)
(I apologize if my measurements are confusing, I don't know how to measure length width and height of this sensor)

Perhaps my sensor is smaller than the other sensors that the gm parts website lists, because the 15-22124 compressor is slightly different than my original compressor?

Some websites suggested to use W/R134A RETROFIT KIT PURPLE with the sensor, perhaps because this truck was originally using R12? As a matter in fact, now that I think about it I never used the A/C of this truck because the guy who sold it to me told me that it never worked, I had it checked out with a mechanic and he said the compressor needed replacing, so perhaps the system never got updated with the R134A system, which is why I'm seeing a lot of odd things with my original A/C system and the ones that the GM OEM recommends? If this is the case, what else should I check in order to update the whole system if it never had been retrofitted for R134A?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 28, 2022, 10:51 AM

Post #17 of 19 (161 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

OK, I'm done here. You are making this way more complicated than it needs to be.

I gave you 2 sources for your switch and all this garbage you posted means nothing. The switch operates on pressure not voltage. It either opens or closes a circuit when it hits a certain pressure. Replacement switches are blue now.

Both of the switches you posted were cycling switches. NOT what you are looking for.

Here, I will break my own rule

https://www.ebay.com/itm/233105614810



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on May 28, 2022, 10:52 AM)


Tom Greenleaf
Ultimate Carjunky / Moderator
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May 28, 2022, 1:13 PM

Post #18 of 19 (147 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

GM made trucks in Canada (door jamb would say so if there still) and Mexico. Doesn't mean that's where it was sent to.

Sticker would say "Meets or exceeds XYZ things" for the US. I own this truck just did it in no time flat the shaft seal leaks out it was windy as hell over winter it was outside. Does it every year without a noticeable leak I'd find the Delphi still OE from new in it is known to do that can't tolerate temps that low the metals don't squeeze to seal when cold so don't leave oily evidence.

That's my own, just done today it's fine but a tad cool to prove itself when hot soon - days soon expected will be.

It was mid 70sF better done when 80F for real or more.

I've changed out others for Sandens this one all OE not touched since new made in Wisconsin - not that I notice my own vehicles. My luck easier as I've known its history since new - you are not so sure adds to only some maybe things I can't know except if Canada model year 1996 would be a metric odometer and speed up top not small under that.

The skinny is if I fixed compressor (might not have plenty of vehicles) it would get a Sanden is an opinion I guess they don't do that in cold weather when outdoors is a good reason to me. If never below about 25F where you are you wouldn't have the issue with Delphi.

That's just places we are that differs not more. I'm here where cold is expected have to leave it out - most folks do trucks are large in most "normal" garages for vehicles,

T


Nacho
User / Moderator

Jun 2, 2022, 4:24 PM

Post #19 of 19 (97 views)
Re: Finding the right A/C compressor when it's serial number is gone Sign In

The HT6 compressor in your truck has several knockoffs. Initially, it was very troublesome, leaky and noise-prone. Sanden came out with an excellent replacement, so did Zexel, and even Visteon with a modified FS10. Today, there are dozens out there, mostly from China. They are all fine. So, it may not look exactly the same as your original HT6, yet, they all fit quite well.
You'll teach them to fly, but they won't fly your flight; you'll teach them to dream, but they won't dream your dreams; you'll teach them to live, but they won't live your life; however, in every flight, in every dream, in every life there always be the print of your lessons taught (Mother Theresa)

(This post was edited by Nacho on Jun 2, 2022, 4:26 PM)






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