Park Avenue Ultra V6-3.8L SC VIN 1 (1991)
Remove the receiver box to locate the bar code serial number label, shown in Figure 2. A large "2" means that the unit is a 1992 model. If the
serial number begins with a "3" or "4", the receiver box should be sent in for service to an authorized AC Delco service center. If the serial number
begins with "5", the latest changes have been made internally, and other causes for the conditions should be investigated.
2.
Integral Receiver Radio - Remove the radio to determine if it is a CDM unit. This type of radio is a two piece unit with the receiver box bolted to
the control head to form one unit, as shown in Figure 1.
Locate the bar code serial number label, shown in Figure 2. A large "2" means that the unit is a 1992 model. If it is a 1992 unit, return the integral
receiver radio to an authorized AC Delco service center.
