Chevrolet Express 2010–2012 — technical service bulletin
Bulletin 14652 · NHTSA communication 10089887 · issued Jul 7, 2015
Technical service bulletin
communication type
Engine
component
2010–2012
model years
24
vehicle entries
Official summary
14652 - special coverage. On some 2010-2012 model year chevrolet express and gmc savana vehicles and 2011-2012 model year chevrolet silverado hd and gmc sierra hd vehicles that are equipped with a 6.6l diesel engine (lml/lgh), a malfunction-indicator light (mil) may illuminate due to an offset in the temperature sensor in the diesel-emission-reduction fluid (def) tank reservoir, increased tank-heater resistance, or reductant-system performance. Dealers are to replace the def tank reservoir and/or supply module pump.
Vehicles covered
- 2010 Chevrolet Express
- 2011 Chevrolet Express
- 2012 Chevrolet Express
- 2011 Chevrolet Silverado 1500
- 2012 Chevrolet Silverado 1500
- 2011 Chevrolet Silverado 2500
- 2012 Chevrolet Silverado 2500
- 2011 Chevrolet Silverado 3500
- 2012 Chevrolet Silverado 3500
- 2010 GMC Savana 1500
- 2011 GMC Savana 1500
- 2012 GMC Savana 1500
- 2010 GMC Savana 2500
- 2011 GMC Savana 2500
- 2012 GMC Savana 2500
- 2010 GMC Savana 3500
- 2011 GMC Savana 3500
- 2012 GMC Savana 3500
- 2011 GMC Sierra 1500
- 2012 GMC Sierra 1500
- 2011 GMC Sierra 2500
- 2012 GMC Sierra 2500
- 2011 GMC Sierra 3500
- 2012 GMC Sierra 3500
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.