Engine Size: 5.3
Country of Origin: United States
Hey guys, I am new to this forum and I need some help. I have a 99 Silverado and when I turn the Ac on it will blow cold for about 5 minutes and then it will turn to more room temperature. I have not been needing it but its starting to get warm in south Ga and so i really need my ac. I know that it has enough Freon because I have checked it myself and the place that serviced my truck said it was fine. If somebody knows what my problem is I would be greatly appreciative.
Proving pressure readings would help! Both while it is cooling and while it is not.
Check if the compressor still engages after it stops cooling.
A common problem is that the clutch gap widens due to wear, when it is too large the clutch plate won't pull in reliably. As the magnet coil behind the pulley heats up, it loses strength, which matches what you say that it works at first when it is cold then quits after warming up.
A simple test for this: after it stops cooling, leave the A/C on and the engine running and go under the hood and hit the clutch plate toward the pulley with a suitable tool, being very careful of the moving parts (On some cars this is simply never going to be safe because of the location of the compressor, but I think your truck has the compressor on top where it is easy to reach). If the gap is the problem it will pull in and start turning and make some cold air, but once it cycles off it will go back to not engaging.
Ok so does anybody have a picture of the part in question? I really have no idea what Im looking at. A
nd if it is the clutch, do I need a whole new condenser or what?
All you have to do is adjust the clutch air gap. No new parts required. Just read one of the previous inquiries on this forum
that tells how to adust.
Check out youtube . Lots of instructional videos .
Tooling avalable for loan ( with deposit ) at the chain auto parts stores ( like AutoZone & the rest ) .
So are yall sure that it is the clutch air gap?
That's my best guess from reading what you said about 400 miles away. You need to actually diagnose the truck.
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