There is an issue after engine startup, the radio, power locks, power windows and the alternator do not work for several minutes, sometimes longer, sometimes shorter. Any thoughts??
Thanks

Sometimes the ignition switch will stick just past the ON position but not quite to the START position and cause some of the accessories not to work. The next time it happens, apply slight counter clockwise pressure on the key to see if that is the case.

Another possible source of trouble on that truck is the junction box - if water has been dripping on the junction box (fuse panel) from a bad windshield seal (it wouldn't take much of a leak at all), the junction box could be faulty. Check it for water damage.