Need help with my 1999 Suburban air conditioning compressor!

Maintenance and Repairs
1

I’m having some issues with the air conditioning compressor in my 1999 Chevrolet Suburban, and I could really use some help from the community.

What’s Going On?

Recently, I noticed that the air conditioning is not blowing cold air anymore. It just blows warm air, which is obviously not ideal, especially in the summer. I tried checking the fuses and the refrigerant levels, but everything seems to be okay on those fronts.

Current Situation

  • AC does not seem to engage when I turn it on.
  • There is a slight clicking sound from the engine compartment when I try to activate the AC.
  • No noticeable leaks, but I can’t really tell for sure.

What I’ve Tried

  • Checking the AC fuse — looks good.
  • Inspecting the refrigerant level — seems to be full.
  • Looking for any visible signs of damage around the compressor and lines.

Questions

  1. Is there any way to troubleshoot if the compressor is bad, or if it’s something else?
  2. Has anyone replaced the compressor themselves? If so, do you have any advice or tips on handling this?
  3. Are there specific parts I should consider or avoid when looking to replace the compressor?
  4. Any DIY guides or resources that could help?

I really appreciate any advice or insight you guys can share. I’d like to get this sorted out before it gets too hot and I have to take the whole family around with no AC. Thanks in advance!

2

I had similar issues with my 1999 Suburban! The air conditioning compressor is known to fail due to age and wear. Common symptoms include poor cooling and strange noises when the AC is on.

3

Yes! I experienced the poor cooling too. It could also be a refrigerant leak. Have you checked the system pressure?

4

Definitely check the pressure first! If it’s low, a leak is likely. I had to replace my compressor after not addressing it early enough, and it wasn’t cheap!

5

Sounds like a costly fix! Has anyone tried cleaning the condenser coils? That helped my friend with his AC issues.

8 Likes
6

That’s a good suggestion! Cleaning the coils can improve efficiency, but if the compressor is shot, it won’t help much.

2 Likes
7

Agreed! I recommend also checking the electrical connections. Sometimes it’s not a mechanical issue but a wiring problem causing the AC to fail.

8

Right! Don’t overlook the fuses either. I found a blown fuse was my issue at one point.

9

Wow, that sounds simple! I might check that out first. Thanks for the tip!

3 Likes
10

Compresser failure does seem common in these models. If it makes a loud noise, it could be the bearings. You might need to replace the whole unit.

11

Don’t panic yet! It might just be the clutch. A simple adjustment could be all that’s needed. Have you checked that?

12

Good call! I’ll look into it. I’d hate to buy a new compressor if that’s not the problem.

13

Wouldn’t we all, haha! But let’s not forget, sometimes it’s a loose belt causing the issue. Check that before assuming it’s more serious.

14

These compressors are really temperamental. Just yesterday I saw a guy with a 99 Suburban struggling with his AC too. Must be a common issue.

15

Oh, for sure! It’s almost like they’re in a love-hate relationship with the vehicle owners!

16

I think it’s reflective of the age of the vehicle too. These parts wear out over time. Just keep up with maintenance to prolong the life of your compressor.

4 Likes
17

Absolutely! Preventative maintenance could save you lots of money in the long run!

18

I’m in the same boat! My 1999 Suburban’s AC compressor just quit. Have you considered OEM parts? They tend to last longer, but they can be pricey.

19

OEM parts are definitely a safe bet, but I was able to find quality aftermarket ones for my last repair. Sometimes you can save a lot! Just check reviews.

20

If you’re handy, consider DIY repair! There are plenty of online guides for replacing AC compressors on older Suburbans. It can save you a bundle!