Engine - Leaking/Plugged Vacuum Pipe Assembly: Overview

Number: 83C04
Section: VI
Date: June, 1983

Subject: PRODUCT EMISSION CAMPAIGN 83C04 LEAKING/PLUGGED EGR VACUUM PIPE ASSEMBLY - 1983 "S" SERIES LIGHT LQ2 2.0L L4 ENGINE

TO: ALL INVOLVED CHEVROLET DEALERS

General Motors has determined that certain 1983 "S" Series Light Duty Trucks equipped with RPO LQ2 2.0L L4 engine may have leaking or plugged EGR vacuum pipe assemblies.

These conditions may affect engine performance and increase the NO(x) and CO exhaust emissions.

To bring these vehicles into compliance with applicable emission requirements, Chevrolet Dealers will inspect, and if required replace, the EGR vacuum pipe assembly in accordance with the instructions outlined in this bulletin.