VEHICLE GETS EXTREMELY LOW GAS, 13 MPG ON AVERAGE. BURNS OIL . NEED TO ADD 2-3 QUARTS OF OIL BETWEEN OIL CHANGES. ENGINE COOLING FAN STAYS ON FOR EXTENDED PERIODS WHILE DRIVING. ALL OF WHICH THE DEALERSHIP SAYS IS NORMAL FOR THE TRUCK. THEY REMOVED THE DRIVESHAFT BECAUSE OF CLUNKING AT 25K MI. REACTION CARRIER REPLACED AND TRANSMISSION RECONDITIONED AT 36,663 MI AFTER CAR STOPPED IN THE MIDDLE OF THE STREET. CAR HAD TO BE TOWED IN. AT 62K MILES ENGINE LIGHT ON AND IDLES ROUGH. REPLACED THROTTLE BODY. AT 67K WON'T ENGAGE IN REVERSE AND MAKES CLUNKING SOUND FROM REVERSE TO DRIVE. REPLACED REVERSE HOUSING, REACTION SHELL, ETC. AT 75K HAD A REACTION CARRIER FAILURE, LOST POWER BRAKES AND LOST POWER TO THE CAR. ALMOST WAS REAR ENDED. HAD TO STOP IN MIDDLE OF PARKING LOT DURING CHRISTMAS RUSH. WAITED 5 MIN AND RESTARTED. ENGINE LIGHT STAYED ON, BUT WAS ABLE TO GET TO DEALERSHIP. WAS TOLD THAT THROTTLE BODY NEEDS TO BE CLEANED EVERY 15K MILES UNDER SERVICE MAINTENANCE. THIS WAS THE FIRST TIME I HEARD THIS! NOT REALLY SURE WHY IT HAD TO BE CLEANED, THOUGH, JUST HAD THE THROTTLE BODY REPLACED 13K MILES AGO. IT SEEMS THAT THERE ARE MAJOR FLAWS IN THE DESIGN OF THE ENGINE. OBVIOUSLY, THE DEALERSHIP HAS BEEN PUTTING BAND AIDS ON MY PROBLEM BECAUSE THEY DON'T KNOW HOW TO FIX. I HAVE BEEN VERY LUCKY THAT MY FAMILY AND CHILDREN HAVE NOT BEEN IN A MAJOR ACCIDENT DUE TO THE MAJOR FLAWS IN THE ENGINE DESIGNS. EVERY TIME I GET MY CAR FIXED, THE TECH ASSURES ME THAT THEY HAVE FIXED THE PROBLEM. I AM REALLY AFRAID TO DRIVE THIS CAR WITH SO MANY CLOSE CALLS. THE CAR IS A HAZARD TO DRIVE! *TR
2006
ENGINE
IN DECEMBER 2010 THE CAMSHAFT IN THE 5.3L GM ENGINE REPORTEDLY DELAMINATED CAUSING ONE OR MORE LIFTERS TO GALL AND FAIL REQUIRING A NEW ENGINE. I PURCHASED A FACTORY 5.3L ENGINE FROM A GM DEALER AND HAD THAT INSTALLED BY A CERTIFIED MECHANIC WITH THE ASSURANCE OF A 3 YEAR 100,000 MILE WARRANTY. 28 AUGUST MY WIFE TOLD ME THE ENGINE WAS NOISY. ON STARTING THE ENGINE IT WAS OBVIOUS THAT OIL WAS NOT PUMPING THROUGH THE LIFTERS. I TOOK THE TRUCK TO THE DEALER ON THE 29TH FOR DIAGNOSIS. ON 30 AUGUST THEY CONCLUDED THAT THE ENGINE NEEDED TO BE REPLACED. SUBSEQUENT INVESTIGATION CONFIRMED THAT THE ENGINE WAS SHIPPED WITH FAULTY CASTECH HEADS THAT CAUSED COOLANT TO SEEP INTO THE OIL. THE ENGINE WAS REPLACED UNDER WARRANTY. I WOULD LIKE, IF IT IS THE JOB OF THE NHTSA, TO HAVE THE 5.3L ENGINE RECALLED. *TR