2014 GMC Denali Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2014 GMC Denali, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Brakes120.0%
- Driver assistance120.0%
- Electrical120.0%
- Engine120.0%
- Fuel system120.0%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
BRAKE FAILURE. THE BRAKE VACUUM PUMP FAILED. I MARKED THE FAILURE AS TODAY AS THE DEALERSHIP CONFIRMED THE FAILURE. THE FAILURE OCCURRED A MONTH OR SO AGO. IT DOES NOT HAPPEN ALL OF TIME.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
THE STABILITY CONTROL LIGHT CAME ON AND IT WOULD NOT LET ME DRIVE IT JUST STOP IN THE ROAD
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
BLIND SPOT SENSORS IN THE MORRORS ARE ALWAYS LIGHTING UP WITH NOTHING TO SET THEM OFF.GM SAYS THERE IS NO FIX AND THEY KNOW OF THIS PROBLEM WITH THE ACADIA
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
WHILE DRIVING ON A CITY STREET THE 2014 GMC SIERRA 6.2 L V8 LOST POWER AND STARTED RUNNING ROUGH AS APPROACHING AN INTERSECTION. I WAS ABLE TO STOP, AND REVERSE THE VEHICLE AWAY FROM THE INTERSECTION, TO GET OUT OF TRAFFIC. THE ENGINE LIGHT WAS FLASHING AND THE TRUCK SHUT DOWN, IT WAS UNABLE TO RESTART. THE TRUCK HAD UNDER 60,000 MILES ON IT AT THE TIME OF THE FIRST INCIDENT. IT WAS TOWED TO A GM DEALER SHOP FOR REPAIR. THIS FIRST INCIDENT TOOK PLACE IN AUGUST OF 2019. THE ROCKER ARM AND EXHAUST SPRING HAD TO BE REPLACED IN THE #2 CYLINDER, THE CYLINDER HEAD HAD TO BE REBUILT WITH A NEW HEAD. IN ADDITION THEY REPLACED 4 FUEL INJECTORS. IN DECEMBER OF 2019, A SECOND INCIDENT HAPPEN WHILE DRIVING ON A CITY STREET, THE ENGINE STARTED RUNNING ROUGH, I WAS CLOSE ENOUGH TO MY HOUSE TO GET IT HOME, PARK IT AND IT WAS TOWED TO A A CERTIFIED GM DEALER SHOP FOR REPAIR. THIS TIME IT HAD 61,752 MILES ON THE VEHICLE, THE NUMBER 5 SPRING BROKE. IT IS AT THE SHOP WAITING ON SPRING REPLACEMENT, THEY ARE IN BACKORDER, THERE IS NOT PROJECTED TIME THE REPAIR WILL BE COMPLETE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
CHECK ENGINE LIGHT CODE FOR DEF HEATER FAILURE. POSSIBLE LIMP MODE EFFECT IN TRAFFIC.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .