Squeaky A/C belt on 2003 Suzuki Grand Vitara

This particular issue happens after starting the vehicle and it runs for a few minutes then it seems like when the a/c compressor kicks in the belt squeaks like a loose belt for just a few minutes and then it stops and everything seems ok after that. I have have the belts and everything checked by three different mechanics and they have suggested that I take it to a dealership for further diagnosis. My work schedule does not allow time for that as I think it may be an all day affair and I would rather be doing other more productive things. I have been searching for a reasonable answer before resorting to going to a dealer. It has become quite annoying to me now. Is there any chance that you guys or someone can help with this? It would be greatly appreciated.

Have you tried installing a new drive belt?