DeVille V8-252 4.1L VIN 8 FI (1983)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
PROM - Calibrations Listings
Bulletin No.
T-89-102
File in Group
6E
Number
71
Corp. Ref. No.
816501R
Date
May, 1989
SUBJECT:
PROM CALIBRATIONS
MODELS AFFECTED: 1980-1989 BROUGHAMS, ELDORADOS, AND SEVILLES 1982-1988 CIMARRONS 1985-1989 DE VILLES AND
FLEETWOODS 1987-1989 ALLANTES
This bulletin replaces bulletins T-87-18A (Dated 9/87) and T-87-18 (Dated 9/86), Group 6E, which should be discarded.
These charts summarize all 1980 through 1989 C, D, E, K, V, and J gasoline engine PROM calibrations to date. When any diagnosis leads to PROM
replacement, the service PROM part number listed should be used. Should any additional PROM calibration changes be made, the GMSPO parts
distribution system will automatically supersede these service part numbers.
PROM changes may be made for many different reasons. For instance, a calibration change may be made in conjunction with component changes, for a
repair relative to a current field condition, or as a running change to provide minor modifications affecting driveability or fuel economy. Therefore, if a
PROM I.D. is lower than the latest PROM available, it does not necessarily need replacement. Refer to the bulletin listed for details about the symptom
that may require a PROM change.
