Can you guys tell me what these two recall campaigns are for?

05546

03063

Guy I don't know if this link will help you at all

http://www.alldata.com/TSB/99_mk.html

Guy, didn't you get my PM?

15,000 Mile (24,000 km) Fuel Filter Change #05546 - (Aug 10, 2005)
05546 -- 15,000-MILE (24,000 KM) FUEL FILTER CHANGE
2001-04 CHEVROLET SILVERADO, KODIAK

2001-04 GMC SIERRA, TOPKICK

EQUIPPED WITH 6.6L V8 (RPO LB7 - VIN 1) DIESEL ENGINE

DUE TO FUEL FILTER AVAILABILITY, CUSTOMER LETTERS WILL BE MAILED IN TWO PHASES. PHASE ONE WILL INCLUDE CUSTOMERS OF 2001-02 MODEL VEHICLES. PHASE TWO WILL INCLUDE CUSTOMERS OF 2003-04 MODEL VEHICLES.

THIS PROGRAM IS IN EFFECT UNTIL SEPTEMBER 30, 2006.

Condition
All 2001-04 Chevrolet Silverado, Kodiak; GMC Sierra, TopKick model vehicles, equipped with a 6.6L V8 (RPO LB7 - VIN 1) Diesel engine, may have a condition in which the fuel filter requires strict adherence to the 15,000 mile (24,000 km) fuel filter change interval.

This program will expire on September 30, 2006.

Correction
Dealers are to perform a free fuel filter change at the next 15,000 mile (24,000 km) change interval.

OBD System Software Upgrade-DTC P0128 Engine Coolant Temperature Below Thermostat Regulating Temperature (Reprogram Engine Control Module) #03063 - (Dec 17, 2003)
On-Board Diagnostic (OBD) System Software Upgrade - DTC P0128, Engine Coolant Temperature Below Thermostat Regulating Temperature (Reprogram Engine Control Module)
2003 Chevrolet Silverado

2003 GMC Sierra

with 6.6L Duramax® Diesel Engine (VIN 1 -RPO LB7)

and with California Emissions (RPO YF5)

and built prior to and including the following VINs:

3E234666

3F180982

Purpose
This bulletin provides information about installing new engine control module (ECM) calibration on certain 2003 vehicles equipped with the 6.6 liter Duramax® diesel engine. The revised calibration includes changes that allow for proper Malfunction Indicator Lamp (MIL) illumination when a P0128 DTC is stored. An updated calibration should be installed as soon as practical. Install the new calibration on all affected vehicles identified in this bulletin, including vehicles in new dealer inventory and any vehicles that return for service for any reason during the applicable 5 year 100,000 mile emission warranty coverage period. To verify if an updated calibration is required, refer to the following procedure in this bulletin.

Service Procedure
Using A Tech 2 scan tool and TIS 2000, verify whether the calibration programmed into the vehicle[rsquo ]s ECM has been programmed with 15100899, 15100900 or later. The GM Vehicle Inquiry System (GM VIS) may be checked to see if the vehicle has been programmed since 15100899, 15100900 or the labor operation Y0001 has been claimed on the vehicle. If the 15100899, 15100900 or later updated calibration has not been installed or the Y0001 labor operation has not been claimed, reprogram the ECM with the latest updated calibration from TIS 2000 version 2.5 for 2003 data update or later.

Thanks Max Power,

I received your PM after I had posted this thread.