GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

DTC 11

DTC 011, 012, 016, or 017

Memory Seat Module

DTC 12

DTC 011, 012, 016, or 017

Memory Seat Module

DTC 16

DTC 011, 012, 016, or 017

Memory Seat Module

DTC 17

DTC 011, 012, 016, or 017

Memory Seat Module

DTC 21

DTC 021

Memory Seat Module

DTC 50

DTC 050 or 055

Memory Seat Module

DTC 55

DTC 050 or 055

Memory Seat Module