Suburban 3/4 Ton 4WD V8-379 6.2L DSL (1985)
Diesel MFI Pump: All Technical Service Bulletins
Diesel Engine - Noise Compliance
Number:
89-42-6E
Section:
6E
Date:
DEC., 1988
Subject: 6.2L DIESEL ENGINES - NOISE COMPLIANCE
Model and Year:
1989 C, K, R, V, TRUCKS AND G, P VANS
WITH 6.2L DIESEL ENGINE
TO:
ALL CHEVROLET DEALERS
A potential noise compliance issue has been discovered on 1989 model 6.2L diesel engines. It is MANDATORY that these units have the timing reset
PRIOR TO VEHICLE SALE to avoid potential noncompliance to Federal, state, and local noise laws. Willfull violation of these laws can result in civil
and/or criminal penalties. To correct this situation, the fuel injection pump timing must be reset on all affected units either in stock, or in-transit to your
location PRIOR TO SALE of the vehicle. IMPORTANT: This procedure does not apply to vehicles that were sold and delivered prior to receipt of this
bulletin or the preceding DCS Message 01-230 dated November 16, 1988.
VEHICLES INVOLVED
ALL vehicles with GVW'S over 10,000 lbs (K or J in the 4th position of the VIN) must be reset. Vehicles under 10,000 lbs. GVW must be reset if they
are to be sold in the following areas:
STATES
California
Oregon
Florida
Washington
Maryland
Colorado
Nevada
COUNTIES:
Cook County, Illinois
LOCALITIES:
Boston, MA
Chicago, IL
Des Plains, IL
Grand Rapids, MI
Madison, WI
Prairie Village, KS
Urbana, IL
Washington, DC
The following VIN's represent the first engines reset by the assembly plants. Those vehicles (as well as those built after these VIN's) do not need to be
reset by dealer personnel.
ASSEMBLY PLANT
PRODUCT
VIN Breakpoint
Flint
Suburban/Utility
KF 123336 Chev.
Janesville
R/V Crew Cab/Cab Chassis
KJ 110735 Chev.
Pontiac East
C/K Pick-Up/Cab Chassis
KE 140612 Chev.
Oshawa
C/K Pick-Up/Cab Chassis
K1 138096 Chev.
Scarborough
G-Van/Cutaway Chassis
K4 120275 Chev.
Detroit Assembly
P Model Chassis
K3 312518 Chev.
Use the following procedure in resetting the injection pump timing:
For noise compliance, fuel injection pump timing on all 1989 6.2L diesels is to be reset using the static timing procedure. The static timing marks,
straight lines on the pump and front housing, must be aligned. The engine must be off while the timing is being set.
STATIC TIMING PROCEDURE:
Adjust:
(Reference Figure 13, Page 6C2-9 in 1989 Service Manual)