Graphic Equalizer Radio - Incorrect GCC Summary Page
Bulletin 86-9-10Date June '86
Ref. No. 86-118-9
SUBJECT: GRAPHIC EQUALIZER RADIO (OPTION UX1)
MODELS AFFECTED: 1986 RIVIERA
1986 Rivieras below VIN GU401975 with UX1 graphic equalizer radios can display an incorrect Graphic Control Center (GCC) summary page on approximately 5% of ignition cycles. The summary page is missing the graphic equalizer and balance keys.
FIGURE 1AFTER BATTERY IS RECONNECTEDTHIS VEHICLE REQUIRES THE FIX:
FIGURE 2AFTER BATTERY IS RECONNECTEDTHIS VEHICLE DOES NOT NEED THE FIX:
To determine if a vehicle has this problem, with the ignition "Off", disconnect and then reconnect the car battery; then turn the ignition "On", and if the graphic equalizer and balance keys are missing from the summary page of the GCC, the EEPROM of the BCM is defective (See Figure 1). A normal GCC summary page is shown in Figure 2.
Refer to Bulletin 86-8-7 for the correct procedures to obtain an exchange EEPROM. Remember to include the vehicle mileage when contacting the Service Center.