One problem related to transmission gear slipping has been reported for the 1996 Chevrolet Silverado. The most recently reported issues are listed below.
Transmission started slipping and stopped shifting into 3rd gear at 50,000 miles. Was rebuilt at trans service shop. Cause was lack of ground wire between control module and transmission causing erratic fluid pressures. I paid the $1470. 00 repair bill. TSB described the defect, I was not notified. This was preventable from chevy's perspective.