NHTSA Complaint #11113393 — 2003 GMC ENVOY

GRADUAL COOLANT LOSS OVER TIME AND NO EVIDENCE OF LEAK. THIS WAS DUE TO A CRACK IN THE CYLINDER HEAD THAT GM ADMITTED TO KNOWING ABOUT IN TSB 06-06-01-019B ON JUNE 12, 2007). COOLANT WAS SLOWLY LEAKING INTO THE OIL, BUT WAS UNNOTICEABLE UNTIL IT STARTED TO AFFECT OIL PRESSURE FROM THE OIL BECOMING SLUSHY AND RUINING THE ENGINE. THIS ENDED UP RESULTING IN RESULTED IN THE LOW ENGINE OIL LIGHT SUDDENLY COMING ON AND THE CAR TO STOP RUNNING ON A HIGHWAY. THE ENGINE STARTED STEAMING AND THE CAR WAS OVERHEATING. MECHANIC IS NOW SAYING THE ENGINE IS IN AN UNOPERABLE SHAPE DUE TO DRIVING WITH CONTINUED LOW OIL PRESSURE (NO LIGHT HAD APPEARED UNTIL DAY OF INCIDENT). GM HAD SENT OUT A BULLETIN ADMITTING TO THE ISSUE BUT DID NOTHING TO NOTIFY THEIR CUSTOMERS. THEY SHOULD IMMEDIATELY RECALL THE AFFECTED VEHICLES AND/OR PAY FOR A REPLACEMENT. I HAD JUST PUT IN A NEW TRANSMISSION TO MY GMC ENVOY, EXPECTING IT TO LAST FOR YEARS.