C 2500 Truck 2WD V8-350 5.7L (1988)
![background image](/gmc/c_2500_truck_2wd/v8-350_5.7l/Page-571001.png)
Technical Service Bulletin # 892086A
Date: 890701
Engine - Oil Cooler Line Leaks
Number:
89-208-6A
Section:
6A
Date:
July 1989
Subject:
ENGINE OIL COOLER LINE LEAKS
Model and Year:
1988-89 (VIN CODES H, K, N, Z) C/K WITH 4.3L, 5.0L, 5.7L AND 7.4L ENGINES
TO:
ALL CHEVROLET DEALERS
Some 1988 and 1989 C/K Trucks with 4.3L, 5.0L, 5.7L, and 7.4L engines and engine oil coolers (KC4) may experience a leaking oil cooler line. This
leak condition may be caused by the line contacting the power steering gear box (located in the left front of the vehicle alongside the frame rail) and
chafing a hole in the line.
If this condition is encountered, it can be repaired by installing the new design lines, which provide additional clearance to the gear box. On all affected
vehicles, it will also be necessary to add a primary or secondary hose protector or both to the cooler lines. These protectors provide additional protection
from the steering gear box for the cooler line.