Description & Operation: Notes

WARNING: Before attempting ANY repairs involving steering column or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG article in the ACCESSORIES/SAFETY EQUIPMENT Section.

Instrument Panel Cluster (IPC) components include Climate Control Center (CCC), Fuel Data Center (FDC) and speedometer cluster. Speedometer cluster consists of speedometer, tachometer (analog only), odometer(s), fuel gauge, warning indicator lights and Driver Information Center (DIC). See Fig 1 and Fig 2 .

The IPC is the heart of the vehicle computer systems. IPC has an internal microprocessor which is the center link between all other computer components/modules in the vehicle's computer system. All component systems and sensors relay input to the IPC through the serial data line or are monitored directly by the IPC.

A twilight sentinel lighting system can be set to control operation of exterior lighting in relation to ambient light (daylight). This lighting system can also be set to keep exterior lights on for a pre-selected amount of time after ignition is turned off. This lighting system uses a photocell, twilight sentinel module assembly and control switch mounted beside headlight switch.

Fig 1: View Of Analog Instrument Cluster Panel

Courtesy of GENERAL MOTORS CORP.

Fig 2: View Of Electronic Instrument Cluster Panel

Courtesy of GENERAL MOTORS CORP.