Tahoe Stalling

My 1999 Tahoe started stalling about 4 months ago. At first it was the fuel pump had the dealer replace it and the fuel filter. This solved the problem for about a month. Then it started again so I changed the fuel filter and installed new plugs and wires this did not help. Next I returned it to the dealer they changed the fuel pump again. Fixed the problem for about 3 weeks. It has started stalling again. Does any one have any Ideas.

You might have some trash in the tank.

If it's happening on rainy or humid days it could be that the cap and rotor is corroded. Replace or just take the exiting ones out and sand off the surface corrosion.