Tahoe 2WD V8-5.3L (2007)
Flexible Fuel Sensor: All Technical Service Bulletins
Campaign - ECM Updates for Virtual Flex Fuel Sensor
Subject:
Service Update for Inventory and Customer Vehicles-E85 Virtual flex fuel Sensor (VFFS) Update-Reprogram ECM
# 06162C - (09/12/2007)
Models:
2006 Chevrolet Impala, Monte Carlo, Silverado, Avalanche, Tahoe, Suburban
2006 GMC Sierra, Yukon, Yukon XL
2007 Buick Terraza
2007 Chevrolet Impala, Monte Carlo, Uplander, Silverado Classic, Tahoe, Suburban, Avalanche, Silverado, Express
2007 GMC Sierra Classic, Yukon, Yukon XL, Sierra, Savana
2007 Pontiac Montana SV6
Equipped with E85 compatible 5.3L V8 (RPO L59 - VIN Z, LC9 - VIN 3 or RPO LMG - VIN 0); 3.5L V6 (RPO LZE - VIN K); or 3.9L V6 (RPO LGD
- VIN W) engines
THIS BULLETIN HAS BEEN REVISED TO ADD 2007 CHEVROLET EXPRESS AND GMC SAVANA VANS TO THE LIST OF INVOLVED
VEHICLES.
PLEASE DISCARD ALL COPIES OF BULLETIN 06162B, ISSUED JUNE 2007.
THIS SERVICE UPDATE INCLUDES VEHICLES IN DEALER INVENTORY AND CUSTOMER VEHICLES THAT RETURN TO THE
DEALERSHIP FOR ANY REASON, AND WILL EXPIRE AT THE END OF THE INVOLVED VEHICLE'S 8YEAR/80,000 MILES (130,000 KM)
EMISSION CONTROLLER WARRANTY PERIOD.
Purpose
This bulletin provides a service procedure to reprogram the Engine Control Module (ECM) on certain 2006 Chevrolet Impala, Monte Carlo, Silverado,
Avalanche, Tahoe, Suburban; GMC Sierra, Yukon, Yukon XL; 2007 Buick Terraza; Chevrolet Impala, Monte Carlo, Uplander, Silverado Classic,
Tahoe, Suburban, Avalanche, Silverado, Express; GMC Sierra Classic Yukon, Yukon XL, Sierra, Savana; and Pontiac Montana SV6 vehicles, equipped
with E85 compatible 5.3L V8 (RPO L59 - VIN Z, RPO LC9 - VIN 3 or RPO LMG - VIN 0); 3.5L V6 (RPO LZE - VIN K); or 3.9L V6 (RPO LGD -
VIN W) engines.
This reprogramming will update the Virtual Flex Fuel Sensor (VFFS) software algorithm installed in these E85 compatible vehicles to better adapt to the
wide variety of ethanol concentrations and refueling processes they may encounter.
This service procedure should be completed as soon as possible on involved vehicles currently in dealer inventory and customer vehicles that return to
the dealer for any type of service during the 8 year/80,000 mile (130,000 km) Emission Controller Warranty.
Vehicles Involved
