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We expect the 2025 Sierra 2500HD will have about average reliability when compared to the average new car. This prediction is based on data from 2022 and 2024 models.
The Reliability score is based on our latest subscriber survey of 2019 GMC Sierra 2500HD owners. The owner comments describe problems respondents experienced with this vehicle.
Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
"two out of eight glow plugs replaced in diesel engine"
Anonymous, OK (2019 GMC Sierra 2500HD Denali 6.6-L V8 diesel)Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
"The coolant level sensor within the reservoir has gone out twice now. The first time it was replaced under warranty and I only paid labor costs. The second time it will not be under warranty, so I'm debating even having it replaced. It is annoying having the low coolant Alert, pop up on the display though."
Anonymous, CO (2019 GMC Sierra 2500HD SLT 6.6-L V8 diesel)Alternator, starter, hybrid battery replacement, hybrid battery related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, spark plugs and wires failure, auto stop/start.
Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, USB ports, alarm or security system, remote engine start, heated or cooled seats, heated steering wheel, headlights, automatic headlights, automatic wipers, wireless charging pad.
Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.
Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
Windows, locks and latches, doors or sliding doors, tailgate, trunk or hatch, mirrors, seat controls (power or manual), seat belts, sunroof, convertible top, glass defect.
Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
"I begin receiving engine error codes. I pulled the codes and they were related to the fuel system. I took it to the dealership where they pulled the fuel filter to find metal in the fuel filter. They had mentioned having known issues with the fuel rail system in this model year truck. Luckily it was still under warranty and was replaced at no cost to me. The entire fuel system had to be replaced due to the metal shavings."
Anonymous, CO (2019 GMC Sierra 2500HD SLT 6.6-L V8 diesel)