Complaint volume
290 consumer-submitted complaints are matched to this model year. Treat the count as a research signal, then read the actual summaries for repeated symptoms.
Complaint records
2018 GMC Sierra Complaints
290 consumer-submitted complaints on record for the 2018 GMC Sierra, grouped by component category.
290 Total complaints
10 Crash reports
1 Fire reports
5 Injury reports
Complaint data reflects consumer-submitted reports. A complaint is not proof
of a defect, recall, or manufacturer fault. Enriched severity fields come
from official bulk records when the complaint can be matched by ODI number.
Buyer interpretation
How to use these complaints before buying
Complaint records are most useful when they turn into inspection points, seller questions, and comparison checks against nearby model years.
Pattern to inspect
The most common categories are power train, engine, service brakes. Use those categories as a test-drive checklist instead of judging the vehicle from the total count alone.
Severity flags
Enriched records include 10 crash reports, 1 fire report, 5 injury reports, and 0 fatality reports. These fields come from complaint records and should be read in context.
Mileage clue
Mileage is available on 121 complaints, with an average reported failure mileage of 45,272 miles. Compare that with the mileage on the listing.
Questions to ask the seller
- Have you had any problems related to power train, engine, service brakes?
- Can I see recent maintenance and repair records?
- Has the vehicle ever been towed, involved in a crash, or repaired for the same issue twice?
- Can we also check the recall record for this 2018 GMC Sierra?
Used-car checklist
Use these complaints before the test drive.
Build a buyer checklist to turn these issues into questions and inspection points.
2018 GMC Sierra
Build buyer checklist Compare with other years Sends year, make, and model to pre-fill your checklist.
How severe are the 2018 GMC Sierra complaints?
10 Crash
1 Fire
5 Injury
0 Fatality
12 Towed
3 Medical attention
What are the most common 2018 GMC Sierra complaint categories?
POWER TRAIN 85
ENGINE 30
SERVICE BRAKES 15
UNKNOWN OR OTHER 14
ELECTRICAL SYSTEM 11
ELECTRICAL SYSTEM,SERVICE BRAKES 10
POWER TRAIN,ENGINE 10
STEERING 10
AIR BAGS 6
SEAT BELTS 4
290 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| Dec 2018 | STEERING | THE TRUCK WAS BEING TURNED ON TO RESUME DRIVING AFTER BRIEF STOP. THE VEHICLE ENGINE TURNED ON BUT VEHICLE STEERING LOCKED, FRONT AND REAR EXTERIOR LIGHTS WENT OUT. AFTER TRUCK TURNED OFF FOR 20 MINUTES. THE STEERING WHEEL UNLOCKED, THE EXTERIOR LIGHTS TURNED BACK ON. I CALLED GMC ROADSIDE SERVICES-!THEY RECOMMENDED TOWING VEHICLE TO DEALERSHIP. | Crash: No Fire: No | Unknown |
| Dec 2018 | STRUCTURE | THE SUNROOF IN THE 2018 GMC SIERRA EXPLODED OUTWARD OF THE VEHICLE, DROPPING GLASS SHARDS INTO THE CABIN. THE VEHICLE WAS IN MOTION AT ABOUT 15 MPH IN A NEIGHBOORHOOD STREET WITH NO OVERHANGING OBJECTS THAT MAY HAVE CONTACTED THE GLASS. THE WEATHER FORECEAST FOR THE DAY WAS SUNNY WITH A HIGH OF 76 DEGREE FAHRENHEIT. NO EXTERNAL CONTACT WAS MADE TO THE SUNROOF GLASS PRIOIR TO THE INCIDENT. NO INVESTIGATION WAS DESIRED BY BOTH THE LOCAL DEALERSHIP OR GENERAL MOTORS ON THE INCIDENT ITSELF. BOTH HAVE DIRECTED ME TO MAKING AN INSURANCE CLAIM TO RECTIFY THE SITUATION. | Crash: No Fire: No | 8,300 |
| Nov 2018 | ENGINE,FUEL/PROPULSION SYSTEM | FUEL INJECTION SEALS #4 O-RING SPLIT - LEAKING FUEL - POOLING GAS ON MANIFOLD. TOOK VEHICLE IN FOR SMELL OF GAS, LACK OF ACCELERATION AND POOR GAS MILEAGE. THIS IS KNOWN ISSUE BASED ON THE SERVICE BULLETIN 18-NA-137 - VEHICLE HAS LESS THAN 6000 MILES | Crash: No Fire: No | 5,460 |
| Nov 2018 | WHEELS | NEW TRUCK WITH 15 MILES. BAD VIBRATION SEEMS TO BE COMING FROM BOTH FRONT AND REAR AREA AT SPEEDS OF 64 TO 72 POSSIBLE TIRES OUT OF BALANCE OR ALIGNMENT. | Crash: No Fire: No | Unknown |
| Nov 2018 | POWER TRAIN,WHEELS | SINCE DAY 1 OF PURCHASING NEW,TO CURRENT DATE, THERE IS VIBRATION AT IDLE. THERE IS VIBRATION AT HIGHWAY SPEEDS OF 60 MPH PLUS. IT HAS BEEN TO THE DEALER 5 TIMES FOR TESTING. THIS IS A KNOWN PROBLEM WITH THOUSANDS OF VEHICLES. GM SAYS IT MEETS THEIR SPECIFICATIONS. THE DEALER BALANCED THE TIRES 3 TIMES, NO LUCK. THE DEALER REPLACED THE TIRES, SAME ISSUE. I AM TOLD THE VIBRATION AT IDLE IS NORMAL. THIS PROBLEM IS DISTRACTING WHEN DRIVING. I HAVE BEEN DEALING WITH GM AND THE DEALER FOR 7 MONTHS WITH NO RESOLVE. HTTPS://WWW.KSHB.COM/NEWS/LOCAL-NEWS/INVESTIGATIONS/GENERAL-MOTORS-CUSTOMERS-FRUSTRATED-OVER-SHAKING-IN-PICKUP-TRUCKS THIS LINK OF A NEWS CLIP SHOWS WHAT IS HAPPENING TO MY VEHICLE. THIS HAPPENS EVERY DAY, SO IGNORE THE DATE I ENTERED BELOW. I HAVE VIDEOS BUT THE FILE IS TOO LARGE TO DOWNLOAD. *TR | Crash: No Fire: No | 200 |
| Nov 2018 | STEERING | I WAS DRIVING 70 MPH DOWN HIGHWAY 75 IN MCKINNEY TX, WHEN MY STEERING COMPLETELY LOCKED UP. LUCKILY I MANAGED TO GET TRUCK STOPPED AND TOWED BACK TO DEALER. THIS COULD EASILY HAVE BEEN A FATALITY ACCIDENT. | Crash: No Fire: No | 8,128 |
| Sep 2018 | VISIBILITY/WIPER | I AM 6'8 AND HAVE NOTICE A SERIOUS INCREASE IN THE BLIND SPOT BEHIND THE REAR VIEW MIRROR. ON APPROACHES TO INTERSECTION, VEHICLES ARE HIDDEN AND I HAVE HAD 3 BEAR MISS COLLISIONS IN THE THE SAME NUMBER OF MONTHS. THIS IS MY 3RD GMC SIERRA AND THE ISSUES APPEARS TO BE RELATED TO ELEVATED SEAT WHICH CAN NOT BE LOWERED TO A SAFE LEVEL. | Crash: No Fire: No | 2,250 |
| Jul 2018 | STEERING | WHEN DRIVING THE VEHICLE IT STEERS VERY HARD LIKE A LACK OF POWER STEERING THAN ALL OF A SUDDEN IT FEELS LIKE THE POWER STEERING KIKS IN CAUSING A OVER STEERING SITUATION . FEELS LIKE YOU HAVE NO CONTROL. HAVE TALKED TO OTHER OWNER WHO HAS SAME ISSUE. PICKUP HAS 40 MILES ON IT. IT HAPPENS EVERY TIME I DRIVE IT. | Crash: No Fire: No | Unknown |
| Jun 2018 | STEERING | WHEN IN TRAFFIC AT ANY SPEED THE STEERING WHEEL WILL ACTUALLY TURN TO THE LEFT. IT TAKES YOU BUY SURPRISE AND IT'S A STRANGE FEELING. I WAS TOLD BY THE DEALER THEIR IS NO ISSUES. VERY SCARY! IT HAPPENS AT ANYTIME AND WITHOUT WARNING. | Crash: No Fire: No | 3,000 |
| Apr 2018 | STEERING | STEERING PULLS TO LEFT WHEN DRIVING AT ANY SPEED, AND TERRAIN. PULLS ENOUGH TO TURN YOU INTO ONCOMING TRAFFIC IF YOU DO NOT CORRECT. TOOK TO DEALERSHIP AND WAS TOLD NOTHING WAS WRONG WITH THE TRUCK. STEERING PROBLEM CONTINUES AND IS DEFINITELY A SAFETY ISSUE. | Crash: No Fire: No | 1,500 |
| Apr 2018 | UNKNOWN OR OTHER | THE VEHICLE OPERATES UNPREDICTABLY WHEN PRESSING ON THE GAS PEDAL CAUSING UNSAFE DRIVING CONDITIONS. WHEN PRESSING THE GAS PEDAL, ANY ONE OF THE FOLLO^WING CONDITIONS MAY OCCUR. 1.) SOMETIMES THE RPM'S DECREASEA. 2. )SOMETIMES THE TRANSMISSION HUNTS SEVERAL TIMES. 3.) SOMETIMES THE VEHICLE SPEED SURGES. 4.) MANY TIMES THE ENGINE HESITATES FOR A LONG PERIOD BEFORE THE RPM'S INCREASE. THIS UNPREDICTABLE OPERATION IS MORE APPARENT WHEN THE ENGINE IS LOADED LIKE GOING UP HILLS AND ESPECIALLY WHEN HEADING INTO STRONG WINDS. THE UNPREDICTABLE OPERATION IS EXTREMELY UNSAFE WHEN DRIVING ON ICE COVERED ROADS. THIS VEHICLE IS ALSO CONSIDERED AN "OFF-ROAD" SERIES VEHICLE. THIS UNPREDICTABLE OPERATION IS VERY UNSAFE, EVEN DANGEROUS, ON AGGRESSIVE TRAILS. WHEN DRIVING IN STEEP TRAILS, DRIVERS REQUIRE FEEDBACK FROM THEIR VEHICLE ESPECIALLY HOW THE VEHICLE OR ENGINE RESPONDS AS THE GAS PEDAL US DEPRESSED. | Crash: No Fire: No | 25 |
| Apr 2018 | AIR BAGS | TAKATA RECALL : STILL WAITING ON A REPLACEMENT. NO ACTION TAKEN BY THE LOCAL DEALER.THE AIRBAG IS STILL INTACT, BUT THE VEHICLE IS STORED OUTSIDE IN THE SOUTHEAST TEXAS HEAT AND I AM CONCERNED ABOUT ITS FRAGILITY BECAUSE OF THIS. LAST CONTACT WITH THE DEALER WAS IN 2017 | Crash: No Fire: No | Unknown |
| Feb 2018 | SERVICE BRAKES | LEFT REAR BRAKE LINE APPEARS TO BE INSTALLED IN HARMS WAY. THAT IS, AN OBJECT ON THE ROAD COULD BE STRUCK WHICH COULD TEAR AWAY THE BRAKE LINE RESULTING IN LOSS OF BRAKING POWER. OTHER VEHICLES OF THE SAME TYPE ON THE DEALER'S LOT WERE OBSERVED TO BE OF THE SAME DESIGN. IF THIS BRAKE LINE IS LOST DUE TO ROAD HAZARD, WILL BRAKING POWER BE LOST? PLEASE ADVISE. THANKS. | Crash: No Fire: No | Unknown |
| Feb 2018 | AIR BAGS | STRUCK A DEER WITH THE VEHICLE AT APPROX. 75MPH. THE DRIVER SIDE AIRBAG DEPLOYED. CONTROL OF THE VEHICLE WAS MAINTAINED AND THERE WAS NO SUDDEN DECELERATION. THE COVER OF THE STEERING WHEEL, WHICH BEARS A PLASTIC GMC LOGO THAT IS HEAVIER THAN THE REST OF THE MATERIAL BLEW EXACTLY ON THE CORNER OF THE G. DUE TO THE LOCATION OF THE SPLIT THE LOGO HIT MY WRIST LIKE A HAMMER CAUSING NERVE DAMAGE AND PERMANENTLY STAMPING THE GMC LOGO ON MY WRIST. I CURRENTLY POSSESS ALL DEPLOYED SRS COMPONENTS ALONG WITH THE ACM THAT WAS IN THE VEHICLE AT THE TIME OF DEPLOYMENT. THE DAMAGE, ASIDE FROM THE SRS COMPONENTS, WAS ONLY TO THE BUMPER, GRILL, AND CONDENSER WITH MINOR DAMAGE TO THE CORE SUPPORT WHERE THE BUMPER MOUNTS (RADIATOR, FENDERS, AND HOOD WERE NOT IMPACTED). I QUESTION THE SAFETY OF THE WAY THE STEERING WHEEL SPLIT AS THE EDGE OF THE G HAS A SHARP EDGE THAT COULD HAVE POTENTIALLY SLIT MY WRIST OPEN. I ALSO QUESTION THE DEPLOYMENT OF THE BAG DUE TO NO SUDDEN DECELERATION AND THAT IF THE BAG HAD NOT BEEN DEPLOYED THERE WOULD HAVE BEEN NO INJURY IN THIS LOSS. ALSO I HAD PREVIOUSLY HAD AN ISSUE WHERE I STARTED THE VEHICLE ON THE FIRST COLD DAY, ALL WARNING LIGHTS ON DASH CAME ON AND ADVISED ME TO SERVICE ALL SYSTEMS. I TURNED OFF THE VEHICLE AND RESTARTED AND THERE WAS NO WARNINGS PRESENT. AFTER THE LOSS AND REPAIRS I EXPERIENCED THIS SAME ISSUE BUT IT WOULD NOT RESOLVE BY RESTARTING THE VEHICLE. THEY PULLED CODES AT THE DEALERSHIP AND PERFORMED A SOFTWARE UPDATE AND I HAVE NOT HAD THIS PROBLEM SINCE. IT WAS COLD DURING THE LOSS BUT THE VEHICLE HAD BEEN RUNNING SEVERAL HOURS AS I WAS DRIVING CROSS COUNTRY AT THE TIME. | Crash: Yes Fire: No Injuries: 1 Towed Medical attention | 1,800 |
| Jan 2018 | STEERING,ELECTRONIC STABILITY CONTROL (ESC),SERVICE BRAKES | WHEN DRIVING VEHICLE AT ANY SPEED IT STEERS TO THE LEFT OR RIGHT . NOT A SIMPLE ALIGNMENT PULL OR WANDER I CAN FEEL THE WHEEL AS TO WHICH WAY IT WANTS TO STEER AT RANDOM. IF NOT PAYING ATTENTION OR IF YOU WERE TO LET GO OF THE STEERING WHEEL IT WILL GO OFF THE ROAD ABSOLUTLY NOT SAFE TO DRIVE. WHILE ACCELERATING THE VEHICLE FEELS LIKE THE BRAKES ARE BEING APPLIED AND DOES NOT ACCELERATE I HAVE TO GIVE EXCESSIVE GAS PETAL THROTTLE TO GET UP TO SPEED. THERE HAVE BEEN TIMES I HAVE CAME HOME FROM AS SHORT DRIVE AND I CAN SMELL THE BRAKES THEY SMELL BURNT HOT. ONE INSTANCE I WAS MERGING ONTO THE HIGHWAY AND THE TRUCK STRUGGLED TO GET UP TO 60MPH I HAD THE PETAL FLOORED AND THE TRUCK WOULD NOT GO OVER 65MPH THE ENGINE WAS @ 5000RPM MAXED OUT IT WOULD NOT SHIFT NOR GO FASTER THAN 65MPH. RANDOMLY TRANSMISSION THUNKS THUD AND SLAMS INTO GEARS WHEN THE AUTOMATIC TRANSMISSION IS SHIFTING AT LOW SPEED BELOW 50. WHILE DRIVING TRUCK FEELS LIKE THE DRIVE TRAN IS BOUND UP LIKE BRAKE IS APPLIED ON INDIVIDUAL WHEEL(S) . I HAVE HAD NOTHING BUT PROBLEMS WITH THIS TRUCK VERY WEIRD ISSUES THAT DON'T MAKE MECHANICAL SENSE. ALSO THE INSTRUMENT CLUSTER GAUGES AND INFOTAINMENT SCREEN DON'T LIGHT UP JUST BLACK SCREENS AFTER STARTING VEHICLE. HAPPENED 2 TIMES NOW. RADIO WAS OFF WHILE DRIVING THEN CAME ON FULL VOLUME WITHOUT TOUCHING ANYTHING. SERVICE STABILITY /STEERING WARNING CAME ON ONCE.I CAN HEAR FRONT TRANSFER CASE ENGAGE AND DISENGAGE AT LOW SPEEDS RANDOMLY WHEN IN 2WD. RANDOMLY STUCK IN LOW GEAR WHEN ACCELERATING FROM A STOP. AND YOU DON'T HAVE TO USE THE BRAKES MUCH TO STOP YOU BECAUSE AS SOON AS YOU LET OFF GAS PETAL THE VEHICLE NEARLY COMES TO A STOP WITHOUT APPLYING BRAKES. AND IF YOU ARE TURNING IT WILL AT TIMES COME TO A COMPLETE STOP. HAS BEEN TO DEALER 6 TIMES NOW THEY SAY EVERYTHING CHECKS OUT. THERE IS A MAJOR COMPUTER ISSUE OR IS HACKED PER ALL IVE RESEARCHED. | Crash: No Fire: No | 150 |