Caprice Classic V8-305 5.0L VIN E TBI (1991)
PROM - Programmable Read Only Memory: Customer Interest
Engine - Low Speed Driveability or Detonation
Number: 93-122-6E
Section: 6E
Date: MARCH 1993
Corporate Bulletin No.: 276110R
ASE No.: A1, A8
Subject:
DRIVEABILITY IMPROVEMENTS
Model and Year:
1991-93 CAPRICE WITH 5.0L AND 5.7L ENGINES
ENGINE APPLICATIONS:
5.0L and 5.7L
(RPOs L03 and L05)
SUBJECT:
Driveability Improvements
(Detonation) - New Calibration
ENGINE VIN (MODELS):
E and 7
VEHICLE APPLICATIONS:
1991-93 Model Year B cars
THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 92-112A-6E, DATED NOV. 1992. THE 1993 MODEL
YEAR HAS BEEN ADDED FOR VEHICLES FOR BROADCAST CODE BCDU, SCANNER I.D. 1391, P/N 16181390, 5.0L B CARS. ALL COPIES
OF 92-112A-6E SHOULD BE DISCARDED.
CONDITION:
Some owners of 1991-1993 model year B cars with either the L03 (VIN E 5.0L V8) or L05 (VIN 7 5.7L V8) engine may comment on low speed
driveability or engine detonation (spark knock).
CORRECTION:
The calibrations have been refined to address these concerns. If, after completing normal diagnostics, the condition remains, replace the PROM with the
appropriate one from the table below:
NOTE:
For L03 B-car only, make certain the vehicle has been updated with the previously attempted service fixes as follows.
DESCRIPTION
PART NUMBER
EGR Valve
17090156 (Stamped on Valve)
17112373 (GMSPO Kit)
PCV Valve
25098542
