Search Bar
Search by Part Number, Part Name, or Vehicle
  • My Garage
  • Cart
  • OE Parts
  • Body & Mirrors
  • Chassis & Brakes
  • Engine & Drivetrain
  • Electrical & Lighting
Help Center
< Back ×
  • Shop OE Parts
  • Shop By Category
  • Body & Mirrors
  • Chassis & Brakes
  • Engine & Drivetrain
  • Electrical & Lighting

2018 GMC Sierra 3500 HD Idler Pulley

My Vehicle Change Vehicle
2018 GMC Sierra 3500 HD
Change Vehicle
Vehicle Options
We need more information about your vehicle to make a correct determination of fitment
< Back to View All
Timing Belts, Chains, Cams & Related Parts
  • Department
  • Brands
  • Prices

9 Products found

Sort by:
Recommended
Filter Results
Sort
View by
  • OEM 2018 GMC Sierra 3500 HD Serpentine Idler Pulley - 12669569
    OEM 2018 GMC Sierra 3500 HD Serpentine Idler Pulley Diagram - 12669569
    View Related Parts

    OEM (Genuine) 2018 GMC Sierra 3500 HD Serpentine Idler Pulley

    PartNumber: 12669569
    $81.33 MSRP: $153.48
    You Save: $72.15 (48%)
    Product Specifications
    • Notes: 6.0 Liter; Silverado, Sierra; 6.0l
    • Other Names: Idler Pulley, Serpentine Idler Pulley
    • Item Dimensions: 6.8 x 4.4 x 4.4 inches
    • Item Weight: 1.20 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12555609, 12580771
    • Part Description: 2018 GMC Sierra 3500 HD Serpentine Idler Pulley
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
  • Gates Drivealign Drive Belt Idler Pulley for 2018 GMC Sierra 3500 HD - 36299

    Gates® Drivealign Drive Belt Idler Pulley for 2018 GMC Sierra 3500 HD

    PartNumber: 36299
    $27.24
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17 mm
    • Contact Surface: Smooth/Backside
    • Material: Steel
    • Number of Grooves: 0
    • Number Of Pulleys: 1
    • Outside Diameter: 3.54"
    • Pulley 1 Flanged: No
    • UPC: 072053394078
    • Width: 31 mm
    • Part Description: 2018 GMC Sierra 3500 HD Drivealign Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | All Trims | 8 Cyl 6.0L
  • Dayco No Slack Lower Light Duty Idler Tensioner Pulley for 2018 GMC Sierra 3500 HD - 89059

    Dayco® No Slack Lower Light Duty Idler Tensioner Pulley for 2018 GMC Sierra 3500 HD

    PartNumber: 89059
    $26.18
    Product Specifications
    • Bearing Inner Diameter 1: 17
    • Bearing Width: 14
    • Belt Type: Serpentine
    • Flat: Y
    • Material: Steel
    • Max Belt Width: 06 Rib
    • Number of Bearings: 1
    • Pulley Outside Diameter: 76
    • Pulley Width: 28
    • UPC: 036687383129
    • Part Description: 2018 GMC Sierra 3500 HD No Slack Lower Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | All Trims | 8 Cyl 6.6L
  • OEM 2018 GMC Sierra 3500 HD Serpentine Idler Pulley - 12611935
    OEM 2018 GMC Sierra 3500 HD Serpentine Idler Pulley Diagram - 12611935
    View Related Parts

    OEM (Genuine) 2018 GMC Sierra 3500 HD Serpentine Idler Pulley

    PartNumber: 12611935
    $56.38 MSRP: $106.39
    You Save: $50.01 (48%)
    Product Specifications
    • Notes: 6.6 Liter Diesel, W/Dual Alternator;6.6 Liter Diesel, W/O Dual Alternator; Silverado, Sierra; 6.6l; Dual Alternator; Lower;Silverado, Sierra; 6.6l; Single Alternator
    • Location: Driver Side; Passenger Side
    • Other Names: Idler Pulley, Serpentine Idler Pulley
    • Item Dimensions: 4.3 x 4.4 x 4.2 inches
    • Item Weight: 0.90 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12581700
    • Part Description: 2018 GMC Sierra 3500 HD Serpentine Idler Pulley
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | AT4, Base, Denali, Denali Ultimate, Pro, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
  • Gates Drivealign Drive Belt Idler Pulley for 2018 GMC Sierra 3500 HD - 38006

    Gates® Drivealign Drive Belt Idler Pulley for 2018 GMC Sierra 3500 HD

    PartNumber: 38006
    $20.09
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17 mm
    • Contact Surface: Smooth/Backside
    • Material: Steel
    • Number of Grooves: 0
    • Number Of Pulleys: 1
    • Outside Diameter: 2.99"
    • Pulley 1 Flanged: No
    • UPC: 072053415308
    • Width: 30.5 mm
    • Part Description: 2018 GMC Sierra 3500 HD Drivealign Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | All Trims | 8 Cyl 6.6L
  • Dayco No Slack Light Duty New Style Idler Tensioner Pulley for 2018 GMC Sierra 3500 HD - 89006

    Dayco® No Slack Light Duty New Style Idler Tensioner Pulley for 2018 GMC Sierra 3500 HD

    PartNumber: 89006
    $20.80
    Product Specifications
    • Bearing Inner Diameter 1: 17
    • Bearing Width: 12
    • Belt Type: Serpentine
    • Flat: Y
    • Material: Steel
    • Max Belt Width: 06 Rib
    • Number of Bearings: 1
    • Pulley Outside Diameter: 90
    • Pulley Width: 30
    • UPC: 038244156948
    • Part Description: 2018 GMC Sierra 3500 HD No Slack Light Duty New Style Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | All Trims | 8 Cyl 6.0L
  • OEM 2018 GMC Sierra 3500 HD Idler Pulley - 12626075
    OEM 2018 GMC Sierra 3500 HD Idler Pulley Diagram - 12626075
    View Related Parts

    OEM (Genuine) 2018 GMC Sierra 3500 HD Idler Pulley

    PartNumber: 12626075
    $47.56 MSRP: $89.76
    You Save: $42.20 (48%)
    Product Specifications
    • Other Names: Idler Pulley
    • Item Dimensions: 4.3 x 4.4 x 4.2 inches
    • Item Weight: 0.80 Pounds
    • Fitment Type: Direct Replacement
    • Replaced by: 12728996
    • Part Description: 2018 GMC Sierra 3500 HD Idler Pulley
    More Info
  • Dayco No Slack Light Duty Idler Tensioner Pulley for 2018 GMC Sierra 3500 HD - 89009

    Dayco® No Slack Light Duty Idler Tensioner Pulley for 2018 GMC Sierra 3500 HD

    PartNumber: 89009
    $14.52
    Product Specifications
    • Bearing Inner Diameter 1: 17
    • Bearing Width: 12
    • Belt Type: Serpentine
    • Flat: N
    • Groove Quantity: 6
    • Material: Polymer
    • Max Belt Width: 06 Rib
    • Number of Bearings: 1
    • Pulley Outside Diameter: 76
    • Pulley Width: 28.7
    • UPC: 038244156979
    • Part Description: 2018 GMC Sierra 3500 HD No Slack Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | All Trims | 8 Cyl 6.0L
  • Gates Drivealign Oe Exact Drive Belt Idler Pulley for 2018 GMC Sierra 3500 HD - 36776

    Gates® Drivealign Oe Exact Drive Belt Idler Pulley for 2018 GMC Sierra 3500 HD

    PartNumber: 36776
    $46.12
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17
    • Contact Surface: Smooth/Backside
    • Material: Steel
    • Number Of Pulleys: 1
    • OE Comparison Rating: OE Exact
    • Outside Diameter: 3.54"
    • Pulley 1 Flanged: No
    • UPC: 770075720409
    • Width: 32
    • Part Description: 2018 GMC Sierra 3500 HD Drivealign Oe Exact Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2018 GMC Sierra 3500 HD | All Trims | 8 Cyl 6.6L