2014 GMC Sierra

521 serious complaints of 859, the most about steering (162) and brakes (143); per car on the road, 0.7× this model's usual year. 9 recalls. NHTSA investigation EA21002: desiccated air bag inflator rupture. NHTSA investigation PE18012: brake vacuum pump failure.

What owners report

“The contact owns a 2014 gmc sierra 1500. While driving 25 mph and making a left or right turn, the vehicle jerked violently and caused the steering wheel to become erratic. The failure recurred numerous times. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 67,800.”

An owner's complaint to NHTSA about the steering, Oct 2016

“Brake assist failed with out warning, brake pedal gets hard, did first time at slow speed in reverse, extreme difficulty in stopping. Luckily was nothing behind me in parking lot. Found out common problem with vacuum pump failure in this year with average mileage around 80,000, I have 86,900 miles.”

An owner's complaint to NHTSA about the brakes, Mar 2019

Fixes and extended coverage

• Extended coverage Some vehicles may have a condition in which the cycling of the thermostat may result in stress fractures on the radiator, and may lead to coolant leaks. 15829 Special Coverage. (GCUS-9-3041, Nov 2016)
• Extended coverage Certain vehicles that are equipped with a diesel engine (RPO LML/LGH/LUZ), a malfunction-indicator light (MIL) may illuminate due to an offset in the temperature sensor in the diesel-emission-reduction fluid (DEF) tank reservoir or increased DEF tank-heater resistance. 29400 Special Coverage. (GCUS-9-3140, Nov 2016)
• Extended coverage Certain Vehicles may have a condition where customers may experience increased brake pedal effort, hardbrake pedal, and/or potentially increased stopping distance. N182202780 01 - Special Coverage. (N182202780, Oct 2019)
• Extended coverage On some vehicles, equipped with e85 flex fuel capability (fhs), the flexible fuel sensor may become inoperative during normal operation due to an electrical failure caused by road salt and other environmental contaminants. 14289 - special coverage. (G-199041, Aug 2014)
• Extended coverage In certain vehicles, if a driver repeatedly sits on the seat belt cable cover located at the base of the driver's seat when entering the vehicle, it may cause the seat belt pretensioner to bend sharply over the seat side shield. 18128 - Special Coverage. (18128, Jun 2018)
• Extended coverage Special Coverage - If a driver repeatedly sits on the seat belt cable cover located at the base of the driver's seat when entering the vehicle, it may cause the seat belt pretensioner to bend sharply over the seat side shield. If this continues to occur over an extended period of time, which is… (N192289390, Jun 2020)

From the manufacturer's bulletins filed with NHTSA. A dealer can look up whether a car has had the work done or is still covered.

859 owner complaints · 9 recalls (check a car's VIN for open recalls) · EPA combined: 17–20 mpg · NHTSA: 2–5 of 5 stars · 2014 trims and features