Enter Vehicle Year Make Model

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

2018 GMC Sierra 3500 HD Parts

What year is your
Free Same Day Shipping

2018 GMC Sierra 3500 HD

Filter Results
  • Notify When Available

    VIDEO

    11-17 Chevy Silverado 2500, 3500; GMC Sierra 2500, 3500 Pitman & Idler Arm Kit

    Replaces 2018 GMC Sierra 3500 HD 2 Piece Steering Kit TRQ PSA64473

    2 reviews
    Brand: TRQ - PSA64473

    • Includes: Idler Arm Bracket
    • Kit Includes: (1) Pitman Arm
    • Quantity: 2 Piece
    • Kit Includes: (1) Idler Arm & Bracket Assembly
    $99.95
    Save 26%
    List $135.95 Save $36.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available

    VIDEO

    O2 Oxygen Sensor Set

    Replaces 2018 GMC Sierra 3500 HD V8 6.0L Downstream 2 Piece O2 Oxygen Sensor Set TRQ OSA61814

    1 reviews
    Brand: TRQ - OSA61814

    • Kit Includes: (2) Downstream O2 Oxygen Sensors
    • Quantity: 2 Piece
    $63.95
    Save 14%
    List $73.95 Save $10.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available

    VIDEO

    Engine Splash Shield

    Replaces 2018 GMC Sierra 3500 HD without All Terrain Package Lower Engine Splash Shield TRQ BDA07277

    3 reviews
    Brand: TRQ - BDA07277

    $44.95
    Save 26%
    List $60.95 Save $16.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available

    VIDEO

    Door Lock Actuator

    Replaces 2018 GMC Sierra 3500 HD Rear Passenger Side Door Lock Actuator TRQ BDA81475

    2 reviews
    Brand: TRQ - BDA81475
    $64.95
    Save 20%
    List $80.95 Save $16.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available

    VIDEO

    92-00 GM FS SUV; 92-17 FS PU (w/OE or CC Upgrade Tow Mirror) Lwr Convex Mirror Glass w/Bcking LH

    Replaces 2018 GMC Sierra 3500 HD Driver Side Lower Convex Towing Mirror Glass For Factory Equipped & Aftermarket Mirrors Trail Ridge TR00560

    9 reviews
    Brand: Trail Ridge - TR00560

    • Includes: Backing Plate
    • Mirror Glass Type: Convex
    • Mirror Type: Towing
    $36.95
    Save 21%
    List $46.95 Save $10.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available

    VIDEO

    07-16 Buick, Cadillac, Chevy, GMC, Hummer, Saab Multifit w/4.8L, 5.3L, 6.0L Water Pump

    Replaces 2018 GMC Sierra 3500 HD V8 6.0L Engine Water Pump TRQ WPA07406

    34 reviews
    Brand: TRQ - WPA07406

    $171.95
    Save 13%
    List $197.95 Save $26.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available

    VIDEO

    11-17 Chevy Silverado 2500, 3500; GMC Sierra 2500, 3500 Steering Kit (6pc)

    Replaces 2018 GMC Sierra 3500 HD Front 6 Piece Steering Kit TRQ PSA64474

    7 reviews
    Brand: TRQ - PSA64474

    • Kit Includes: (1) Pitman Arm
    • Quantity: 6 Piece
    • Kit Includes: (1) Idler Arm & Bracket Assembly
    • Kit Includes: (2) Front Outer Tie Rods
    • Kit Includes: (2) Front Inner Tie Rods
    $150.95
    Save 24%
    List $197.95 Save $47.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available

    VIDEO

    Radiator

    Replaces 2018 GMC Sierra 3500 HD V8 6.0L Radiator TRQ RDA83025

    16 reviews
    Brand: TRQ - RDA83025

    $228.95
    Save 21%
    List $290.95 Save $62.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available
    CV Axle Assembly

    Replaces Front CV Axle Assembly TRQ CSA34498

    1 reviews
    Brand: TRQ - CSA34498

    $148.95
    Save 21%
    List $188.95 Save $40.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

  • Notify When Available

    VIDEO

    Transfer Case Shift Motor

    Replaces 2018 GMC Sierra 3500 HD 4 Wheel Drive with RPO Code NQF (2 Speed, Electric Shift, MP1625/1626 Transfer Case) Transfer Case Shift Motor TRQ DTA15604

    4 reviews
    Brand: TRQ - DTA15604
    $117.95
    Save 26%
    List $158.95 Save $41.00

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

    Guaranteed to Fit 2018 GMC Sierra 3500 HD

1

...

1 2 3 4 5

...

62
Close



GMC is a registered trademark of General Motors Company. 1A Auto is not affiliated with or sponsored by GMC or General Motors Company. See all trademarks.
Same Day Shipping

Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos to guide you step-by-step through your repair.

Go To Top
Specify your vehicle

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

If your vehicle isn't listed, close the window to return to search.