I have a '98 blazer without option ZN4. I found that the part number exchanges list two different compressors depending on whether you have the ZN4 option. Does anyone know what (if anything) actually changed? I've read different opinions from switching to metric bolts to different electrical connectors to no difference at all. Does anyone know for sure? Thanks in advance.

 

Really? Nobody on this forum has tried to interchange them?

 

If you have a 1998 Blazer with the 4.3L engine, from the factory it came with a Harrison HT6 compressor:



It comes with a guarantee that it will leak at the case seal

 

OK, are all HT6 compressors wired and plumbed the same?

 

Yes. Automatic climate control or manual HVAC, they are all the same. Only the S&T pick ups had a 4 cyl engine option, and they used a Harrison V-7 compressor. All 2nd gen 4.3L S&T pick up and utility vehicles used the Harrison HT6.

 

Thanks, I appreciate the help.

 

I have a 98 Blazer w/4.3 and I need to know the build date code in order to replace my engine with another reman engine. Can anyone help?

 

Well, this really has nothing to do with this thread and should probably be its own thread. However, you can find the build date inside the driver's door jamb. Good luck.

 

The build date is on the top line of the sticker on the driver's door, or the driver's door jamb.

The build date shouldn't matter for engine selection on a 1998 model.

Look in the glove box as well. There's a sticker in there with the RPO codes for all options on your Blazer.

For the engine, you'll probably have L35, and there's probably a "W" in the 8th position of the VIN. That's the identifiers for the 4.3L v6.

I'm pretty sure there was only one version used in 1998. There are two different oil pans for the engine, one for 4wd, and one for 2wd. If your old oil pan is undamaged, you can reuse it. If your old oil pan has issues (a big hole where part of the crankshaft or connecting rod went through it), you need to get the correct application to match your drivetrain.