What type ac compressor do I have on my truck

[luvmyS10]

I have a 03 Sonoma 4x4 crew cab with 4.3. The ac works fine but as I pulled into the drive way I heard a strange sound. After checking it was the ac compressor. when i turn on the ac the compressor sounds like its clacking or knocking. It gets louder with higher rpms. I was going to replace the compressor and dont know if its a H6 or a HT6. any ideas or suggestions would be helpful. Thanks

[old_master]

4.3L V6 engine uses a Harrison H6. The 2.2L 4 cyl engines use HT6. Very common, (as in they all do it) for them to develop a leak where the case halves come together. Usually on the bottom where you can't see it without removing it. Sanden makes a different design compressor and doesn't have this problem, and it's much quieter than the H6.

Harrison H6 compressor:


Sanden compressor:

[luvmyS10]

Thank you! the part store here has everco and uac brands available without ordering, do these work well? or should I wait and order online thanks

[old_master]

I've replaced countless compressors, but never a Sanden. I've been installing them for several years and haven't had a problem. It's a mechanical part and eventually they will fail too, but, the design is superior to the H6 and it's noticeably quieter. If you get a remanufactured compressor, you're at the mercy of the rebuilder, might get a good one, might not. I stay away from reman compressors. Everco has been around for years, and generally has good quality parts, not sure who makes their compressors though. uac... never heard of them. Hope this helps.

[luvmyS10]

Thank you, but I mistated the brand, not uac but compressorworks. But I went and checked out sanden website, out of stock...my luck..lol. All I priced was new, no rebuilt for me. But thank you for the info