NHTSA Complaint #10894924 — 2005 GMC SIERRA 1500

CASTECH CYLINDER HEADS ON 2001 THROUGH 2006 5.3L VORTEC ENGINES ARE POROUS AND ALLOW ANTIFREEZE TO SEAP INTO THE OIL. THIS IS A SAFETY CONCERN AS IT CAN DESTROY THE ENGINE (OIL DOESN'T LUBRICATE CORRECTLY, SLUDGE BUILDUP) AND LEAVE SOMEONE, AT THE LEAST, STRANDED, AT THE WORST, IT CAN CAUSE A HUGE ENGINE FIRE. GM HAS BEEN AWARE OF THIS SINCE 2007. THEY ISSUED A BULLETIN DESCRIBING THE PROBLEM AND WHAT NEEDS TO BE DONE TO FIX, BUT NO RECALL. TO FIX EITHER THE CYLINDER HEADS NEED TO BE REPLACED ($2500) OR THE ENTIRE ENGINE NEEDS TO BE REPLACED ($5500). MY VEHICLE IS A 2005 GMC SIERRA 1500 SLE. ALSO THE PROBLEM HAS BEEN CONFIRMED BY A LICENSED MECHANIC. THE FOLLOWING IS A LINK TO THE GM ISSUED BULLETIN. HTTP://WW2.JUSTANSWER.COM/UPLOADS/BLUEGORILLA/2008-12-05_142924_COOLANT_LOSS_5.3.PDF