My '03 had a TSB on the ? ECM connector???? I don't really remember ...... but the plug was on the passengers side....they had to clean it and put dielectric grease in and seal it up............mine acted up after washing also......this solved the problems.......I think I am getting CRS..

 

my 05 has done the same thing a few times last year.. all the gauges went to zero, all the dash lights came on and the chime/dinger started dinging.. It did it about 3 or 4 times last year and then has not done it since..

Sounds like yours is happening a lot more often..

Never did figure out why it was doing It.. I never took it in for it either.. Didn't want to loose my truck for a week just o have them tell me "Could not reproduce concern"

Gerry