One problem related to manual transmission has been reported for the 1998 Chevrolet Silverado. The most recently reported issues are listed below.
Transmission went out it started that when you put it reverse it didn't want to go then put into drive then reverse it worked. Then while driving we pulled into parking spot and tried to reverse it was totally gone. Windshied wipers stop working on and off. You can hear the motor they won't move and at most times it effects the windshield washer fluid so it doesn't work.