S10/T10 P/U 4WD V6-173 2.8L (1986)
PROM - Programmable Read Only Memory: Customer Interest
Engine - Blue/White Smoke From Tailpipe
Number:
87-156
Section:
6E
Date:
JUNE, 1987
Subject:
BLUE/WHITE SMOKE FROM TAILPIPE
Model and Year:
1986 AND 1987 S/T TRUCKS WITH 2.8L
V-6 ENGINE (VIN CODE R) AND FEDERAL EMISSIONS
TO:
ALL CHEVROLET DEALERS
Some 1986 and 1987 S/T Trucks with 2.8L V-6 engines and Federal Emissions may exhibit a blue/white smoke from the tailpipe after an extended idle.
To repair this condition, check the truck for loss of coolant or excessive use of oil and repair, if necessary.
If engine checks O.K. (no oil or coolant loss), replace the PROM using the chart on the back of this Bulletin for application and part numbers. Use the
service procedure in Section 6E-Engine Emissions and Driveability of the appropriate service manual.
Use applicable labor time and operation numbers.
SERVICE PROM APPLICATION
MODEL
MODEL
TRANSMISSION
AXLE
SERVICE
YEAR
PROM
86/87
S/T
M4
ALL
1228541
86/87
S/T
M5
3.73
1228542
3.42
86/87
S/T
M5
4.11
1228543
86/87
S
A4
ALL
1228544
86
T
A4
3.73
1228545
87
T
A4
3.73
1228544
86/87
T
A4
4.11
1228545
(For 2.8L 1986/87 Federal Emissions applications only.)
