One problem related to transmission failure has been reported for the 1998 Chevrolet C1500. The most recently reported issues are listed below.
Transmission failure in a 1998 Chevrolet C1500 pickup truck . Ses light comes on and harsh shift 1to 2 and no overdrive all the shops I talked to say it is a engineering desgn flaw in the transmission and gm knows about it. But after talking to gm customer service they have no idea of that the transmissions are failing . Cottman transmission has contacted them about the large number of failures.