Chevrolet Express 2010–2012 — technical service bulletin
Bulletin 15114 · NHTSA communication 10089893 · issued Jul 8, 2015
Technical service bulletin
communication type
Electrical System
component
2010–2012
model years
19
vehicle entries
Official summary
15114 - special coverage. On some 2010-2012 model year chevrolet silverado hd and gmc sierra hd or 2011-2012 chevrolet express and gmc sierra hd vehicles equipped with a 6.6l duramax diesel engine (rpo lml, lgh) the malfunction indicator lamp (mil) may illuminate due to a condition with the glow plugs. When diagnosed, replacement of one of the engines glow plugs may be required. No drivability issues are generally associated with this issue, but harder starting in cold ambient temperatures may be noted. Dealers are to replace the affected glow plug.
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 Sanana
- 2010 GMC Savana
- 2011 GMC Savana
- 2012 GMC Savana
- 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.