Driving Axle (Front) - Fluid Leaks From Vent

91chevy27

Number: 91-445-4C

Section: 4C

Date: NOV. 1991

Corporate Bulletin No.: 164305

ASE No.: A3


Subject: FRONT AXLE VENT HOSE CONNECTOR LEAK


Model and Year: 1988-91 K TRUCK


Owners of some 1988-91 K1, K2, K3 trucks may experience a leak at the front axle vent hose connector (54, Figure 1). This leak usually occurs at the threads of the front axle vent hose connector.

This leak may be caused by inadequate sealer applied to the vent connector threads and relaxation or shrinkage of the vent connector material.

This leak may be corrected by replacing the vent hose connector with a revised connector featuring an O-ring seal.

Figure 1:

SERVICE PROCEDURE:

Remove (Figure 1)

1. Front axle skid plate (if equipped).

2. Clamp (52).

3. Hose (53) from the vent connector.

4. Vent hose connector (54).

Install (Figure 1)

1. New vent hose connector (54).
-Torque to 13 N-m (10 lbs.ft.).
-Sealer is NOT required or recommended.

2. Hose (53) to the vent connector.

3. Clamp (52).

4. Front axle skid plate (if equipped).


SERVICE PARTS INFORMATION

P/N DESCRIPTION QTY

26032443 Connector, Front Axle 1 per vehicle
Vent Hose

Parts are currently available from GMSPO.


WARRANTY INFORMATION

For vehicles repaired under warranty use:

Labor Operation: F3269

Use applicable labor time guide for labor hours.