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Dave Nova
Dave Nova, GMC Technician
Category: GM
Satisfied Customers: 19450
Experience:  ASE Master Certification. GM World Class Certification
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My 2011 Gmc diesel truck just got a msgs service exhaust

Customer Question

My 2011 Gmc diesel truck just got a msgs service exhaust system. What can I do? And other msgs 50 miles limited
Submitted: 1 year ago.
Category: GM
Expert:  Dave Nova replied 1 year ago.

There has been a factory recall on some for that type of concern. It involves a reprogramming of the exhaust fluid system and would have to be done by the dealership.

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Here is what it states.

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Recall - Diesel Exhaust Fluid Calibration Enhancement

PRODUCT EMISSION

Bulletin No.: 11001A

Date: August 05, 2011

Subject: 11001A - Diesel Exhaust Fluid Calibration Enhancement

Models:
2010-2011 Chevrolet Express
2011 Chevrolet Silverado HD
2010-2011 GMC Savana
2011 GMC Sierra HD

With a 6.6L Turbo Duramax Diesel Engine (LML/LGH) Supercede:
The Service Procedure in this bulletin has been revised to include the following statement.

Note: If a customer comments about a diesel exhaust fluid (DEF) low or speed limited soon message that currently will not clear of the DEF low or speed limited soon latch message appears soon after programming the engine control module (ECM), refer to the most current version of PIP4864 in SI. Please discard all copies of bulletin 11001, issued July 2011.

Condition

General Motors has decided to conduct a Voluntary Emission Recall involving certain 2010-2011 model year Chevrolet Express, GMC Savana; 2011 model year Chevrolet Silverado HD and GMC Sierra HD vehicles equipped with a 6.6L Turbo Duramax Diesel Engine (LML/LGH). The Diesel Exhaust Fluid (DEF) injection system may not operate as intended. If this occurs the Malfunction Indicator Lamp may illuminate, a DEF system warning may be displayed in the Driver Information Center, and vehicle speed could be limited.

Correction

Dealers are to reprogram the engine control module.

Vehicles Involved

Involved are certain 2010-2011 model year Chevrolet Express, GMC Savana; 2011 model year Chevrolet Silverado HD and GMC Sierra HD vehicles equipped with a 6.6L Turbo Duramax Diesel Engine (LML/LGH).