Diesel Engine - Altitude Performance Adjustments: Overview

83chevy7

Number: 82-I-148

Section: VIt

Date: May, 1983
Subject: 1982 ALTITUDE PERFORMANCE ADJUSTMENTS 4.3L V6 DIESEL ENGINE

TO: ALL CHEVROLET DEALERS

The following information describes which vehicles, equipped with a 4.3L V6 diesel engine, require altitude adjustments and which are "all altitude" systems.

1982 Federal Monte Carlo models equipped with 4.3L V6 diesel engines (Engine Family C364.3D7ZZT7) will be manufactured with either high or low altitude diesel emission systems. Cars equipped with the high altitude emission system will be invoiced with option NA6. The type of system can also be identified by the emission label attached to the fan shroud. The label will indicate that the car was built for primary use at either high or low altitude. These procedures are considered altitude performance adjustments and apply only to in-use vehicles. They should not be used to modify vehicles prior to sale.

1982 California Monte Carlo models and 1982 Federal and California Celebrity models equipped with 4.3L V6 diesel engines (Engine Family C3G4.3D7ZZK6) were manufactured with all altitude" diesel emission systems. Altitude performance adjustments must not be used on "all altitude" vehicles.