Emissions - Enhanced EGR Circuit Diagnostics

9218chevy08

Number: 91-27-6E

Section: 6E

Date: June 1990

Corporate Bulletin No.: 016523


Subject:
ENHANCED EGR CIRCUIT DIAGNOSTICS


Model and Year:
1987-88 MONTE CARLO WITH 4.3L ENGINE
1987-90 CAPRICE WITH 4.3L ENGINE
1987-91 CAPRICE WITH 5.0L/5.7L ENGINE
1988-91 CAMARO WITH 5.0L ENGINE


TO: ALL CHEVROLET DEALERS

This information replaces the diagnostic charts and test descriptions found in the "Driveability And Emissions" Section 6E2-A (Code 32) and Section 6E2-C7 portions of the 1987-1991 5.0L LO3 (VIN E), 5.7L LO5 (VIN 7), and 4.3L LB4 (VIN Z) "B," "D," "F," and "G" service manuals.

CARLINE VIN ENGINE YEAR

B Z 4.3L LB4 1987-90
B E 5.0L LO3 1989-91
B 7 5.7L LO5 1989-91

F E 5.0L LO3 1988-91

G Z 4.3L LB4 1987-88

For information on code setting criteria and EGR operation, refer to the existing service manual sections








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