CADILLAC SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. REVISED ECM CALIBRATION. CERTAIN VEHICLES EQUIPPED WITH ENGINE RPO LAU (HFV6) MAY EXHIBIT THE FOLLOWING CONDITION. THE CURRENT ENGINE CONTROL MODULE (ECM) CALIBRATION AIGORITHM INCREASES THE TURBO BOOST PRESSURE IN RESPONSE TO RETARDED SPARK TIMING. CSC LETTER WAS REC'D. *PE
