One problem related to crankcase (pcv) has been reported for the 2011 GMC Sierra. The most recently reported issues are listed below.
Tl-the contact owns a 2011 GMC Sierra. The contact stated that while at a stop light, the vehicle lost power. The check engine warning light illuminated. The vehicle was taken to an independent mechanic who diagnosed that two spark plugs needed to be replaced and that the vehicle consumed excess engine oil. The vehicle was not repaired. The vehicle was then taken to a dealer who diagnosed that the pcv valve, valve cover and two spark plugs needed to be replaced. The vehicle was repaired. However, the failure recurred. The manufacturer was not notified of the failure. The failure mileage was 31,500. Oo.