C 3500 Truck 2WD V8-454 7.4L (1990)
Fuel Supply Line: All Technical Service Bulletins
Engine - No Start After Storage
Number:
90-335-6A
Section:
6A
Date:
August 1990
Corp. Bulletin No.: 066302
Subject:
ENGINE NO START AFTER EXTENDED STORAGE
Model and Year:
1990 TRUCKS WITH FUEL INJECTION AND 2.5L, 2.8L, 4.3L, 5.0L, 5.7L, 7.4L ENGINE
TO:
ALL CHEVROLET DEALERS
Some 1985-90 light trucks equipped with throttle body injection (TBI) engines (see list below) may experience a condition where fuel delivery to the
engine is interrupted causing a no start. This condition may be caused by deterioration of the in-tank fuel pump coupler hose located between the sending
unit assembly and the fuel pump. The deterioration is caused by prolonged high ambient temperatures in combination with low fuel volumes (or stale
fuel) and extended vehicle storage.
Engine Displacement And RPO
VIN Identification
2.5 L TBI (LN8)
E
2.8 L TBI (LL2)
R
4.3 L TBI (LB4)
Z
5.0 L TBI (LO3)
H
5.7 L TBI (LO5)
K
7.4 L TBI (L19)
N
