Linear EGR Valve Installation (57-65-28)

Publication date: 1996-01-01
Reference number: 57-65-28

LINEAR EGR VALVE INSTALLATION

TECHNICAL SERVICE BULLETIN

Reference Number(s): 57-65-28, Date of Issue: January, 1996

LINEAR EGR VALVE INSTALLATION

Model(s): 1993-96 Chevrolet and GMC Truck

S/T, M/L, C/K, P, G Models

1993-94 Oldsmobile Bravada

1996 Oldsmobile Bravada

Section: 6E- Engine Fuel & Emission

Bulletin No.: 57-65-28

Date: January, 1996

VEHICLES AFFECTED

Vehicles with 4.3L V6, 5.0L V8, 5.7L V8 Engine, (VINs W, X, M, R - RPOs L35, LF6, L30, L31.

SERVICE INFORMATION

When installing Linear EGR Valves, take care to orientate the valve properly before installation. It is possible to rotate the Linear EGR valve 180°, and then install it on the intake manifold.

NOTE: Linear EGR Valves improperly installed do not function as intended. Possible driveability concerns include a rough idle and the setting of codes DTC 32 (EGR Error) or DTC 1406 (Pintle Position Error). Linear EGR Valves improperly installed may respond to high vacuum conditions (at idle) by pulling the valve open, or high back pressure conditions by pushing the valve open.

When replacing or re-installing a LEGR valve, install the valve (with a new gasket) in the correct orientation.

A new insulated gasket for use with this valve has been released for production and service. See Fig 1 , Fig 2 and Fig 3 .

PARTS INFORMATION

LINEAR EGR VALVE INFORMATION

Application	Description	Part Number
All Linear EGR Valves	Gasket Only	12555896

IMPORTANT: The new gasket must be used whenever a LEGR valve is removed and reinstalled.

Parts are currently available from GMSPO.

Fig 1: 1993-95 4.3L LB4 TBI V6 Engine

Fig 2: 1993-95 4.3L L35 CPI V6 Engine

Fig 3: 1996 4.3L LF6 & L35 V6, 5.0L L30 & 5.7L L31 V8 Engine