2001 tahoe

need some major help automotive forums people
my tahoe seemed to want to die out with air on & with air off raido clock changed time by it self in netural it would want to die rev/for with brake on same so I had the alt checked they said its good battery checked said good so what did i do I changed the alt,battery,belt and worked for 2-3 weeks started the same thing again.
what can I look for please any Ideas thanks richram
:screwy: :screwy: :screwy:

When the last time you clean the throttle butterfly vavle in the air intake

well today if you think it will help
thanks richram

tried for couple of days samething any other Ideas would be helpfull
thanks richram