Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
Before replacing IPC, attempt to clear DTC B0670 using scan tool. If DTC B0670 cannot be cleared, replace IPC. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Go to SIR DIAGNOSTIC SYSTEM CHECK .