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The 2006 Sierra 2500HD is less reliable than other cars from the same model year.
The Reliability score is based on our latest subscriber survey of 2006 GMC Sierra 2500HD owners. The owner comments describe problems respondents experienced with this vehicle.
AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
"The a/c will be working fine then the fan starts making a noise and stops blowing."
Anonymous, CA (2006 GMC Sierra 2500HD SLE 6.6-L V8 diesel)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.
"Turn signals."
Anonymous, LA (2006 GMC Sierra 2500HD SLE 6.6-L V8 diesel)Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
"Fuel lines around the diesel fuel filter had dry rotted."
Anonymous, LA (2006 GMC Sierra 2500HD SLE 6.6-L V8 diesel)Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
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.
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.
Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
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.
Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
""The a/c will be working fine, then it gets loud and stops blowing and the small amount of air coming through the vents is no longer cold.""
Anonymous, CA (2006 GMC Sierra 2500HD SLE 6.6-L V8 diesel)