Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain vehicles with a 6.6L diesel engine. The Engine Control Module (ECM) may not properly adjust fuel injector flow for the normal variation in fuel injector flow rate characteristics. This could result in rough engine idle or increased fuel consumption.
Dealers are to update the ECM with improved fuel injector flow rate data by performing Fuel Injector Flow Rate Programming with the diagnostic scan tool.
