NHTSA Complaint #10927734 — 2010 GMC SIERRA 1500

AT ~ 54,000 MILES, THE VEHICLE EXPERIENCED INCREASED OIL CONSUMPTION AND LOST COMPRESSION ON TWO CYLINDERS. THIS VEHICLE HAS ONLY BEEN SUBJECTED TO HIGHWAY MILEAGE OF ABOUT 30 MILES/DAY ON AVERAGE AND HAS BEEN PROPERLY MAINTAINED. THE DAMAGE WAS TO THE EXTENT THAT CYLINDERS HAD TO BE REPLACED AND IT TOOK THE DEALERSHIP 25 DAYS TO REPAIR. A COWORKER HAD THE SAME ENGINE ISSUE ON HIS CHEVROLET SILVERADO WITH THE SAME 5.3 LITER ENGINE AT ~ 45,000 MILES. A CURSORY SEARCH OF THE INTERNET WILL REVEAL THAT THIS IS NOT AN ISOLATED INCIDENT. THE OVERWHELMING MAJORITY OF OWNERS COMMENTS THAT I HAVE RESEARCHED BELIEVE THAT IT IS CAUSED BY THE ACTIVE FUEL MANAGEMENT SYSTEM FAILING TO PROPERLY LUBRICATE COMPONENTS WHEN THE ENGINE CYCLES BETWEEN 4 AND 8 CYLINDERS. GM DISAVOWED ANY KNOWLEDGE OF THESE INCIDENTS WHEN CONTACTED. THE SERVICE DEPARTMENT OF MY LOCAL GMC DEALERSHIP DISAVOWED ANY KNOWLEDGE ALSO ALTHOUGH I PRESENTED THEM OVER A DOZEN PAGES OF GM OWNERS GROUP WEB PAGES WITH DESCRIPTION OF THE SAME ENGINE FAILURES. HOWEVER, WHEN THEIR MECHANIC WAS QUESTIONED AS TO WHETHER HE WAS REPAIRING THE PROBLEM OR MERELY EXCHANGING DAMAGED PARTS, HE REPLIED "IT WON'T HAPPEN AGAIN, WE DO THIS ALL THE TIME". THIS TELLS ME THAT MY VEHICLE IS NOT THE FIRST THAT THEY HAVE SEEN WITH THIS PROBLEM.