OnStar Description and Operation (UE1 with IOB/IO6)
This OnStar system consists of the following components:
Telematics communication interface control module
OnStar three button assembly
Micr
DTC B0997
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
appro
SCHEMATIC AND WIRING DIAGRAMS
SHIFT LOCK CONTROL WIRING SCHEMATICS
Shift Lock Control
DIAGNOSTIC INFORMATION AND PROCEDURES
DTC B270A
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure: Diagnostic System
Check - Vehicle
Review the description