Possible control calibration previous to next?
To get the latest stock calibration, you should compain of a chuggle or a surge between 40-65MPH and during a low angle uphill and downhill grade. It could also set an intermittent DTC 32 (EGR valve malfunction). The dealer should reflash the EEPROM for you as per TSB 57-65-17. The Impala (and all LT1 equipped cars) no longer have removable EPROMs that are simply swapped out. Instead, the PCM contains an EEPROM that can be reprogramed from the diagnostic port. If you want to replace your PCM or get a spare when you send it away to be reprogrammed, there are only certain LT1 PCM’s that will work. The 94-95 Vette PCM is different than the Impala/Z28 PCM. The number to get for the 94-95 Impala is P/N 16188051. This is used only on the LT1 and the L99, so it can be out of any 94-95 Caprice, Impala, Roadmaster, Fleetwood, Trans-Am, Formula, Z28, or B4C Camaro. For 1996, all L99, LT1, and LT4 engines use the same PCM. This is P/N 16214399.
• 16229981 – Control module calibration (initial ’96 calibration) • 16235361 – Chuggle and surge To get the latest stock calibration, you should compain of a chuggle or a surge between 40-65MPH and during a low angle uphill and downhill grade. It could also set an intermittent DTC 32 (EGR valve malfunction). The dealer should reflash the EEPROM for you as per TSB 57-65-17. The Impala (and all LT1 equipped cars) no longer have removable EPROMs that are simply swapped out. Instead, the PCM contains an EEPROM that can be reprogramed from the diagnostic port. If you want to replace your PCM or get a spare when you send it away to be reprogrammed, there are only certain LT1 PCM’s that will work. The 94-95 Vette PCM is different than the Impala/Z28 PCM. The number to get for the 94-95 Impala is P/N 16188051. This is used only on the LT1 and the L99, so it can be out of any 94-95 Caprice, Impala, Roadmaster, Fleetwood, Trans-Am, Formula, Z28, or B4C Camaro. For 1996, all L99, LT1, and LT4 eng
