2010 GMC Sierra Engine Problems

ENGINE LIFTER ISSUE/LOW OIL PRESSURE PROBLEM RELATES TO HAVING THE LIFTERS REPLACED. THE 5.3 VORTEC ENGINE HAS AFM (ACTIVE FUEL MANAGEMENT). DEALER WANTS $5800 TO FIX THE LIFTER ISSUE, WHILE ESTIMATES TO REPLACE THE ENGINE WITH NECESSARY PARTS RUNS BETWEEN $6900 AND $7200. IS THIS A MANUFACTURER PROBLEM? TRUCK HAS 52,000 MILES AND HAS BEEN SERVICED AT REGULAR INTERVALS. TRUCK WAS PARKED WHEN THE ISSUE BECAME EVIDENT DURING THE STARTUP. TRUCK IS NOW AT THE DEALER (TOWED) AWAITING REPAIR.

ENGINE STOPPED RUNNING, DASH GAUGES BLANK. I MANAGED TO PULL OVER WITHOUT POWER BRAKES OR STEERING! AFTER A FEW MINUTES I WAS ABLE TO RESTART WITH "REDUCED ENGINE POWER, TRACTION CONTROL OFF, AND STABILITRAC" PROBLEMS DISPLAYED ON DASH. I WAS A MILE FROM HOME IN -10F TEMPS! I PULLED IT INTO MY SHOP. DTC CODE P2135 WHICH HAS TO DO WITH THROTTLE POSITION SENSOR. THE DEALER HAS A 2 WEEK DELAY IN GETTING INTO THEIR GARAGE! I FOUND OUT THAT THE THROTTLE BODY/SENSOR IS NOT COVERED UNDER WARRANTY. SO WITH THE COST OF A TOW (CAN'T TRUST THE TRUCK TO MAKE TO DEALER) PLUS THE PART COST, I WILL REPAIR IT MYSELF. THE REASON FOR THIS LETTER, I DISCOVERED THAT THIS HAS HAPPENED TO OTHER GMC TRUCK OWNERS. THEIR VEHICLE QUIT IN THE SAME MANNER. I THINK THAT "REDUCED POWER" IS NOT THE SAME AS NO POWER!!! I WONDER WHAT WOULD HAVE HAPPENED TO ME IF I WAS ON THE FREEWAY DURING RUSH HOURS??? BE PREPARED FOR SOME CREATIVE DRIVING! *TR

DRIVING AT APPROXIMATELY 42 MPH THE VEHICLES WARNINGS LIGHTS CAME ON INFORMING ME THAT THE STABILITRAC NEEDED SERVICE, TRACTION CONTROL WAS NO LONGER WORKING AND THE ENGINE WAS OPERATING AT A LOSS OF POWER. THE ENGINE STARTED SHAKING AND THE DIFFERENTIAL STARTED TO CLUNK AS IF IT WERE GOING IN AND OUT OF ENGAGEMENT. AN IMMEDIATE POWER LOSS, I WAS UNABLE TO KEEP UP WITH TRAFFIC AND WAS IN BECOMING A HAZARD TO OTHER MOTORISTS. THE ENGINE STARTED TO PING AND FELT AS IF IT WERE FIRING ON 2 OR 3 CYLINDERS. I PULLED OVER INTO THE BREAKDOWN LANE AND SHUT THE TRUCK OFF. SEVERAL MINUTES LATER I STARTED THE TRUCK AND IT RAN NORMAL, HOWEVER APPROXIMATELY 2 MILES DOWN THE ROAD IT DID THE EXACT SAME THING. I MANAGED TO TAKE THE "BACK ROADS" HOME WITHOUT ENDANGERING ANYONE. THE NEXT MORNING IT STARTED AND RAN NORMAL. YESTERDAY IT HAPPENED AGAIN ONLY THIS TIME I WAS AT A MAJOR INTERSECTION AND ALMOST CAUSED A COLLISION BECAUSE I WAS UNABLE TO GET THROUGH THE INTERSECTION BEFORE THE LIGHT CHANGED. I MADE IT THROUGH AND CALLED TO HAVE THE TRUCK TOWED TO THE DEALERSHIP. VERY DANGEROUS SITUATION. *TR