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Re: 1987 Cadillac Deville a/c codes 46 & 47, low refrigerant
Posted to HVAC Forum on 9/9/1997 9 Replies

Cadillac TSB T-93-112 (7/1/93) lists part numbers for BCM EPROM updates.

TSB T-89-95 lists the update for 1988-89 DeVilles with the problem you describe.

Double-check the year via the VIN.

BCM parameter P3.1 will show you the current EPROM ID.

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