2018 GMC Sierra 1500 Engine
Owner-reported problems and safety issues filed with NHTSA. Review common failures, severity levels, and complaint trends over time.
Complaint Timeline
Chronological view of owner reports
TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT THE VEHICLE VIBRATED ABNORMALLY WHILE DRIVING. THE VEHICLE WAS TAKEN TO INGERSOLL AUTO OF DANBURY (84 FEDERAL RD, DANBURY, CT 06810, (203)885-7774) FOR AN OIL CHANGE AND THE ENGINE WAS FLUSHED ON FOUR OCCASIONS. THE CONTACT STATED THAT THE VIBRATION INCREASED. THE VEHICLE WAS TAKEN TO THE SAME DEALER AND A TIRE ROTATION AND ALIGNMENT WAS PERFORMED. THE CONTACT WAS ALSO INFORMED THAT THE TIRES NEEDED TO BE REPLACED. THE TORQUE CONVERTER WAS ALSO REPLACED HOWEVER, THE FAILURE REMAINED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND REFERRED THE CONTACT TO NHTSA FOR ASSISTANCE. THE APPROXIMATE FAILURE MILEAGE WAS 47,000.
47,012 MILES RADIATOR FAILURE, LEAKING BADLY. GM DENIED REPAIR UNDER WARRANTY
TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT A COOLANT SMELL WOULD EMIT FROM THE VEHICLE UPON EXIT. THE CONTACT ALSO STATED THAT HIS VEHICLE HAD BEGAN TO LOSE COOLANT AT AN ABNORMAL RATE AND HAD TO BE FREQUENTLY REPLACED. THE CONTACT TOOK THE VEHICLE TO MCCONNELL AUTOMOTIVE (3150 DAUPHIN ST, MOBILE, AL 36606) WHERE THEY CONFIRMED THAT THERE WAS A CRACK IN THE RADIATOR WHICH RESULTED IN A COOLANT LEAK. HE WAS ALSO INFORMED THAT THERE WAS NO RECALL ON THE VIN AND THAT THE WARRANTY DID NOT COVER THE REPAIR. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND PROVIDED THE SAME INFORMATION AS THE DEALER. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 42,000.
AT 55000 MILES THE RADIATOR STARTED TOO LEAK GM WOULD ONLY PAY 250.00 DOLLARS OF THE 876.00 IT COST
WHILE DRIVING WITH THE ROADS IN A WET CONDITION, FOR VARIOUS LENGTHS OF TIME, AND IN DIFFERENT MANEUVERS, THE SERVICE ENGINE LIGHT WILL START FLASHING AND THE VEHICLE WILL BEGIN TO LOSE POWER. AFTER A FEW MINUTES, THE SERVICE ENGINE LIGHT WILL GO SOLID AND THE TRACTION CONTROL LIGHT WILL ILLUMINATE. THE VEHICLE LOSES MORE POWER. ON BRAKING, JUST BEFORE THE VEHICLE COMES TO A COMPLETE STOP, THERE IS A CLUNK IN THE TRANSMISSION AND THE VEHICLE LURCHES. THIS HAS OCCURRED 6 TIMES IN THE LAST 14 MONTHS. UPON INVESTIGATION, TROUBLE CODE P0308 SHOWS IN THE OBD TOOL. THE ISSUE COULD NOT BE REPRODUCE BY THE DEALERSHIP SO THERE HAS NOT BEEN ANY RESOLUTION, JUST THOUGHTS.
THE RADIATOR IS LEAKING COOLANT WITHOUT ANY REAL CAUSE AND I WAS TOLD THE ENTIRE RADIATOR NEEDS TO BE REPLACED.
I HAVE HAD MY GMC SIERRA 1500 FOR ALMOST 3 YEARS. I HAVE A LITTLE UNDER 59,000 MILES ON THE TRUCK. A FEW THOUSAND MILES AGO A TECH AT THE GM DEALER LET ME KNOW THAT THEY HAD TO ADD SOME COOLANT AND IT WAS SOMETHING I SHOULD KEEP AN EYE ON. I BROUGHT THE VEHICLE BACK TO HAVE THEM LOOK INTO IT. THEY LET ME KNOW THAT THE RADIATOR HAS A SMALL LEAK. IT IS NOT BIG ENOUGH TO HAVE FLUID HIT THE GROUND IN MY GARAGE BUT IT IS LOOSING FLUID. I LOOKED ONLINE AND SAW THAT THIS IS A COMMON ISSUE. I WAS TOLD THAT IT WAS NOT COVERED UNDER WARRANTY AND IT WOULD COST A GOOD AMOUNT TO FIX. I HAVE HAD THIS VEHICLE FOR UNDER 3 YEARS AND HAVE HAD 5 ISSUES WITHOUT ANY OF THEM BEING COVERED BY WARRANTY. THIS VEHICLE SEEMS TO BE A LEMON.
TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE TEMPERATURE GAUGE INDICATED THAT THE VEHICLE WAS OVERHEATED. NO WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO BECK & MASTEN BUICK GMC NORTH (11300 FM 1960 WEST, HOUSTON, TX 77065, (877) 380-8433) WHERE IT WAS DIAGNOSED AND DETERMINED THAT THE RADIATOR WAS LEAKING COOLANT AND THAT THE RADIATOR NEEDED TO BE REPLACED. COOLANT WAS REFILLED IN THE VEHICLE. THE DEALER CONTACTED THE MANUFACTURER FOR ASSISTANCE WITH REPAIRS. THE FAILURE MILEAGE WAS APPROXIMATELY 47,000.
Trend Over Time
Complaints by year
Other Issues
Common problems reported
Quick Summary
The 2018 GMC Sierra 1500 has 33 Engine complaints on file. Review the timeline above for detailed owner experiences.