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Replacement and OEM Parts for 2003 GMC Sierra 2500 HD Timing Belts, Chains, Cams & Related Parts

2003 GMC Sierra 2500 HD Timing Belts, Chains, Cams & Related Parts

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Engine & Drivetrain

208 products about 2003 GMC Sierra 2500 HD Timing Belts, Chains, Cams & Related Parts found

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  • OEM 2003 GMC Sierra 2500 HD AC Belt Diagram - 12576447
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD AC Belt

    PartNumber: 12576447
    OEM 2003 GMC Sierra 2500 HD AC Belt - 12576447
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter; All Models; 4.8l, 5.3l, 6.0l; AC
    • Other Names: AC Belt, Serpentine Belt
    • Item Dimensions: 9.1 x 3.6 x 0.9 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12554028, 12569346
    • Part Description: 2003 GMC Sierra 2500 HD AC Belt
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $22.66 MSRP: $41.04
    You Save: $18.38 (45%)
  • OEM 2003 GMC Sierra 2500 HD AC Belt Diagram - 12576447
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD AC Belt

    PartNumber: 12576447
    OEM 2003 GMC Sierra 2500 HD AC Belt - 12576447
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter; All Models; 4.8l, 5.3l, 6.0l; AC
    • Other Names: AC Belt, Serpentine Belt
    • Item Dimensions: 9.1 x 3.6 x 0.9 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12554028, 12569346
    • Part Description: 2003 GMC Sierra 2500 HD AC Belt
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $22.66 MSRP: $41.04
    You Save: $18.38 (45%)
  • OEM 2003 GMC Sierra 2500 HD AC Belt Diagram - 12576447
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD AC Belt

    PartNumber: 12576447
    OEM 2003 GMC Sierra 2500 HD AC Belt - 12576447
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter; All Models; 4.8l, 5.3l, 6.0l; AC
    • Other Names: AC Belt, Serpentine Belt
    • Item Dimensions: 9.1 x 3.6 x 0.9 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12554028, 12569346
    • Part Description: 2003 GMC Sierra 2500 HD AC Belt
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $22.66 MSRP: $41.04
    You Save: $18.38 (45%)
  • OEM 2003 GMC Sierra 2500 HD AC Belt Diagram - 12576447
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD AC Belt

    PartNumber: 12576447
    OEM 2003 GMC Sierra 2500 HD AC Belt - 12576447
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter; All Models; 4.8l, 5.3l, 6.0l; AC
    • Other Names: AC Belt, Serpentine Belt
    • Item Dimensions: 9.1 x 3.6 x 0.9 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12554028, 12569346
    • Part Description: 2003 GMC Sierra 2500 HD AC Belt
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $22.66 MSRP: $41.04
    You Save: $18.38 (45%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Idler Pulley Diagram - 12669569
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Idler Pulley

    PartNumber: 12669569
    OEM 2003 GMC Sierra 2500 HD Serpentine Idler Pulley - 12669569
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter; 8.1 Liter Gas
    • 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: 2003 GMC Sierra 2500 HD Serpentine Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, Denali, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
    $54.20 MSRP: $102.28
    You Save: $48.08 (48%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Idler Pulley Diagram - 12669569
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Idler Pulley

    PartNumber: 12669569
    OEM 2003 GMC Sierra 2500 HD Serpentine Idler Pulley - 12669569
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter; 8.1 Liter Gas
    • 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: 2003 GMC Sierra 2500 HD Serpentine Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, Denali, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
    $54.20 MSRP: $102.28
    You Save: $48.08 (48%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Idler Pulley Diagram - 12669569
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Idler Pulley

    PartNumber: 12669569
    OEM 2003 GMC Sierra 2500 HD Serpentine Idler Pulley - 12669569
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter; 8.1 Liter Gas
    • 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: 2003 GMC Sierra 2500 HD Serpentine Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, Denali, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
    $54.20 MSRP: $102.28
    You Save: $48.08 (48%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner Diagram - 12609719
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    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Tensioner

    PartNumber: 12609719
    OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner - 12609719
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter, P/S & Alternator; All Models; 4.8l, 5.3l, 6.0l
    • Other Names: Belt Tensioner, Serpentine Tensioner, Tensioner
    • Item Dimensions: 6.6 x 4.5 x 4.5 inches
    • Item Weight: 1.90 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12580162, 12554027
    • Part Description: 2003 GMC Sierra 2500 HD Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, Denali, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
    $61.34 MSRP: $101.54
    You Save: $40.20 (40%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner Diagram - 12609719
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Tensioner

    PartNumber: 12609719
    OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner - 12609719
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter, P/S & Alternator; All Models; 4.8l, 5.3l, 6.0l
    • Other Names: Belt Tensioner, Serpentine Tensioner, Tensioner
    • Item Dimensions: 6.6 x 4.5 x 4.5 inches
    • Item Weight: 1.90 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12580162, 12554027
    • Part Description: 2003 GMC Sierra 2500 HD Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, Denali, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
    $61.34 MSRP: $101.54
    You Save: $40.20 (40%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner Diagram - 12609719
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Tensioner

    PartNumber: 12609719
    OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner - 12609719
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter, P/S & Alternator; All Models; 4.8l, 5.3l, 6.0l
    • Other Names: Belt Tensioner, Serpentine Tensioner, Tensioner
    • Item Dimensions: 6.6 x 4.5 x 4.5 inches
    • Item Weight: 1.90 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12580162, 12554027
    • Part Description: 2003 GMC Sierra 2500 HD Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, Denali, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
    $61.34 MSRP: $101.54
    You Save: $40.20 (40%)
  • Dorman OE Solutions Center Inner Regular Grade Type Harmonic Balancer Assembly Kit for 2003 GMC Sierra 2500 HD - 594-209

    Dorman® OE Solutions Center Inner Regular Grade Type Harmonic Balancer Assembly Kit for 2003 GMC Sierra 2500 HD

    PartNumber: 594-209
    Product Specifications
    • Notes: Direct Replacement
    • Color/Finish: Black
    • Degree Markings: No
    • Drive Belt Type: Serpentine
    • Grade Type: Regular
    • OE Part Number: 12553112, 12576652, 12634105, 19300488, 8-12576-652-0, 8-12634-105-0, 12617538, 8193004880, 8126152970
    • UPC: 019495118732
    • Part Description: 2003 GMC Sierra 2500 HD OE Solutions Center Inner Regular Grade Type Harmonic Balancer Assembly Kit
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.0L
    $83.71
  • Dorman OE Solutions Aluminum Timing Chain Cover for 2003 GMC Sierra 2500 HD - 635-522

    Dorman® OE Solutions Aluminum Timing Chain Cover for 2003 GMC Sierra 2500 HD

    PartNumber: 635-522
    Product Specifications
    • Color/Finish: Silver
    • Grade Type: Regular
    • Length: 13"
    • Material: Aluminum
    • OE Part Number: 12561243, 8-12561-243-0
    • UPC: 885484513396
    • Width: 10.5"
    • Part Description: 2003 GMC Sierra 2500 HD OE Solutions Aluminum Timing Chain Cover
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.0L
    $82.45
  • Dorman OE Solutions Steel Harmonic Balancer Bolt for 2003 GMC Sierra 2500 HD - 917-139

    Dorman® OE Solutions Steel Harmonic Balancer Bolt for 2003 GMC Sierra 2500 HD

    PartNumber: 917-139
    Product Specifications
    • Material: Steel
    • OE Part Number: 12557840
    • UPC: 037495332637
    • Part Description: 2003 GMC Sierra 2500 HD OE Solutions Steel Harmonic Balancer Bolt
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.0L
    $5.06
  • OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner Diagram - 12580196
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Tensioner

    PartNumber: 12580196
    OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner - 12580196
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter, AC Belt
    • Other Names: Belt Tensioner, Serpentine Tensioner, Tensioner
    • Item Dimensions: 4.8 x 3.1 x 2.7 inches
    • Item Weight: 1.10 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12562065, 12565372
    • Part Description: 2003 GMC Sierra 2500 HD Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $55.60 MSRP: $104.91
    You Save: $49.31 (48%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner Diagram - 12580196
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Tensioner

    PartNumber: 12580196
    OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner - 12580196
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter, AC Belt
    • Other Names: Belt Tensioner, Serpentine Tensioner, Tensioner
    • Item Dimensions: 4.8 x 3.1 x 2.7 inches
    • Item Weight: 1.10 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12562065, 12565372
    • Part Description: 2003 GMC Sierra 2500 HD Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $55.60 MSRP: $104.91
    You Save: $49.31 (48%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner Diagram - 12580196
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Tensioner

    PartNumber: 12580196
    OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner - 12580196
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter, AC Belt
    • Other Names: Belt Tensioner, Serpentine Tensioner, Tensioner
    • Item Dimensions: 4.8 x 3.1 x 2.7 inches
    • Item Weight: 1.10 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12562065, 12565372
    • Part Description: 2003 GMC Sierra 2500 HD Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $55.60 MSRP: $104.91
    You Save: $49.31 (48%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner Diagram - 12580196
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Tensioner

    PartNumber: 12580196
    OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner - 12580196
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter, AC Belt
    • Other Names: Belt Tensioner, Serpentine Tensioner, Tensioner
    • Item Dimensions: 4.8 x 3.1 x 2.7 inches
    • Item Weight: 1.10 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12562065, 12565372
    • Part Description: 2003 GMC Sierra 2500 HD Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $55.60 MSRP: $104.91
    You Save: $49.31 (48%)
  • OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner Diagram - 12580196
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Serpentine Tensioner

    PartNumber: 12580196
    OEM 2003 GMC Sierra 2500 HD Serpentine Tensioner - 12580196
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter, AC Belt
    • Other Names: Belt Tensioner, Serpentine Tensioner, Tensioner
    • Item Dimensions: 4.8 x 3.1 x 2.7 inches
    • Item Weight: 1.10 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12562065, 12565372
    • Part Description: 2003 GMC Sierra 2500 HD Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $55.60 MSRP: $104.91
    You Save: $49.31 (48%)
  • Gates Drivealign OE Exact Automatic Belt Tensioner for 2003 GMC Sierra 2500 HD - 38260

    Gates® Drivealign OE Exact Automatic Belt Tensioner for 2003 GMC Sierra 2500 HD

    PartNumber: 38260
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17 mm
    • Contact Surface: V-Ribbed Grooved
    • Material: Thermoplastic
    • Number of Grooves: 6
    • Number Of Pulleys: 1
    • OE Comparison Rating: OE Exact
    • Outside Diameter: 76 mm
    • UPC: 770075142317
    • Width: 25 mm
    • Part Description: 2003 GMC Sierra 2500 HD Drivealign OE Exact Automatic Belt Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 8.1L
    $64.68
  • Dayco SUPERCHARGER PERF BALANCER, POWERBOND for 2003 GMC Sierra 2500 HD - PBO81190SC10

    Dayco® SUPERCHARGER PERF BALANCER, POWERBOND for 2003 GMC Sierra 2500 HD

    PartNumber: PBO81190SC10
    Product Specifications
    • Bolt Hole Quantity: 9
    • Counterweight Balance: Neutral, no counterweight
    • Crank Bore: 1.481; 37.60
    • Crank Trigger/Exciter Plate: No
    • Hardware Included: No
    • Installation Instructions Included: Yes
    • Nose Outside Diameter: 2.126; 54.00
    • Number of Integrated Pulleys: 2
    • Outer Ring Material: Steel
    • Overall Outside Diameter: 214.00; 8.426
    • Overall Width: 117.50; 4.626
    • Pulley 1 Number Of Grooves: 4
    • Pulley 1 Outside Diameter: 191.200; 7.528
    • Pulley 1 Type: Serpentine
    • Pulley 2 Number Of Grooves: 8
    • Pulley 2 Outside Diameter: 210.000; 8.268
    • Pulley 2 Type: Serpentine
    • Ring Width: 2.569; 65.23
    • Timing Marks: Yes
    • Woodruff Key Included: No
    • Part Description: 2003 GMC Sierra 2500 HD SUPERCHARGER PERF BALANCER, POWERBOND
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.0L
    $415.62
  • Sealed Power Full Babbitt Camshaft Bearing Set for 2003 GMC Sierra 2500 HD - 1404M

    Sealed Power® Full Babbitt Camshaft Bearing Set for 2003 GMC Sierra 2500 HD

    PartNumber: 1404M
    Product Specifications
    • Notes: Babbitt material; Full round design
    • Material: Babbitt
    • Package Alert: Full set
    • Part Material: Babbitt Material
    • Set Type: Cam Set
    • Size: Standard
    • UPC: 724956049660
    • Part Description: 2003 GMC Sierra 2500 HD Full Babbitt Camshaft Bearing Set
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 8.1L
    $38.12
  • Victor Reinz Timing Cover Gasket Set for 2003 GMC Sierra 2500 HD - 15-10237-01

    Victor Reinz® Timing Cover Gasket Set for 2003 GMC Sierra 2500 HD

    PartNumber: 15-10237-01
    Product Specifications
    • Bolt Hole Quantity: 0
    • Color: Color May Vary
    • Complete: Y
    • Configuration: Multi Piece
    • Contains Applications: Y
    • Crankshaft Seal Included: Y
    • Gasket Material: Molded Rubber And Metal
    • Grade Type: Regular
    • Length: 4.380
    • Meets or Exceeds OEM Specs: Y
    • Release Wave: 12/15/2017
    • Thickness: 0.640
    • UPC: 023913661120
    • Width: 4.380
    • Part Description: 2003 GMC Sierra 2500 HD Timing Cover Gasket Set
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.6L
    $103.86
  • Gates Drivealign OE Exact Automatic Belt Tensioner for 2003 GMC Sierra 2500 HD - 38172

    Gates® Drivealign OE Exact Automatic Belt Tensioner for 2003 GMC Sierra 2500 HD

    PartNumber: 38172
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17 mm
    • Contact Surface: V-Ribbed Grooved
    • Material: Thermoplastic
    • Number of Grooves: 6
    • Number Of Pulleys: 1
    • OE Comparison Rating: OE Exact
    • Outside Diameter: 2.76"
    • Pulley 1 Flanged: Yes
    • UPC: 072053675528
    • Width: 24 mm
    • Part Description: 2003 GMC Sierra 2500 HD Drivealign OE Exact Automatic Belt Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.6L
    $57.71
  • Dayco No Slack Automatic Belt Tensioner Assembly for 2003 GMC Sierra 2500 HD - 89323

    Dayco® No Slack Automatic Belt Tensioner Assembly for 2003 GMC Sierra 2500 HD

    PartNumber: 89323
    Product Specifications
    • Belt Type: Serpentine
    • Direction: Counter Clock Wise
    • Number Of Pulleys: 1
    • Pulley 1 Diameter: 76
    • Pulley 1 Flat: N
    • Pulley 1 Number Of Grooves: 6
    • Pulley 1 Width: 28.7
    • UPC: 036687471642
    • Part Description: 2003 GMC Sierra 2500 HD No Slack Automatic Belt Tensioner Assembly
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 8.1L
    $68.68
  • Gates Accessory Belt Drive Kit for 2003 GMC Sierra 2500 HD - 90K-38260

    Gates® Accessory Belt Drive Kit for 2003 GMC Sierra 2500 HD

    PartNumber: 90K-38260
    Product Specifications
    • Notes: {K060950, 38260, 36299}; W/105A. Alt.
    • Belt Outside Circumference: 2428
    • Belt Part Number: K060950
    • Belt Top Width: 0.807
    • Idler Pulley 1 Part Number: 36299
    • Tensioner Assembly Part Number: 38260
    • UPC: 770075758051
    • Part Description: 2003 GMC Sierra 2500 HD Accessory Belt Drive Kit
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 8.1L
    $117.38
  • Dayco No Slack Automatic Belt Tensioner Assembly for 2003 GMC Sierra 2500 HD - 89259

    Dayco® No Slack Automatic Belt Tensioner Assembly for 2003 GMC Sierra 2500 HD

    PartNumber: 89259
    Product Specifications
    • Belt Type: Serpentine
    • Direction: Clock Wise
    • Number Of Pulleys: 1
    • Pulley 1 Diameter: 76
    • Pulley 1 Flat: N
    • Pulley 1 Number Of Grooves: 6
    • Pulley 1 Width: 30.1
    • UPC: 036687244178
    • Part Description: 2003 GMC Sierra 2500 HD No Slack Automatic Belt Tensioner Assembly
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.6L
    $53.88
  • Gates Accessory Belt Drive Kit for 2003 GMC Sierra 2500 HD - 90K-38260A

    Gates® Accessory Belt Drive Kit for 2003 GMC Sierra 2500 HD

    PartNumber: 90K-38260A
    Product Specifications
    • Notes: {K060956, 38260, 36299}; W/145A. Alt.
    • Belt Outside Circumference: 2440
    • Belt Part Number: K060956
    • Belt Top Width: 0.807
    • Idler Pulley 1 Part Number: 36299
    • Tensioner Assembly Part Number: 38260
    • UPC: 770075758068
    • Part Description: 2003 GMC Sierra 2500 HD Accessory Belt Drive Kit
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 8.1L
    $112.88
  • Four Seasons Idler Tensioner Pulley for 2003 GMC Sierra 2500 HD - 45935

    Four Seasons® Idler Tensioner Pulley for 2003 GMC Sierra 2500 HD

    PartNumber: 45935
    Product Specifications
    • Notes: Grooved; w/o AC
    • Belt Type: Back Idler
    • Belt Width IN: 1.000
    • Belt Width MM: 28.575
    • Bore Dia. IN: .472
    • Color: Black
    • Groove Quantity: 6
    • I.D. MM: 32.0
    • Inside Diameter: 1.18
    • Material: Steel
    • Meets / Exceeds OEM: Yes
    • Mount Hole Qty: 1
    • Mounting Hardware: Not Included
    • O.D. MM: 90.488
    • Outside Diameter: 3.500
    • Pulley Type: Idler Pulley
    • Pulley Width IN: 1.130
    • Pulley Width MM: Idler / Tensioner Pulley
    • Style: Idler / Tensioner Pulley
    • UPC: 096361030800
    • Width: 30
    • Part Description: 2003 GMC Sierra 2500 HD Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.6L
    $19.69
  • OEM 2003 GMC Sierra 2500 HD Rear Main Seal Gasket Diagram - 12633904
    View Related Parts

    OEM (Genuine) 2003 GMC Sierra 2500 HD Rear Main Seal Gasket

    PartNumber: 12633904
    OEM 2003 GMC Sierra 2500 HD Rear Main Seal Gasket - 12633904
    Product Specifications
    • Notes: 4.8, 5.3 & 6.0 Liter Gas
    • Item Dimensions: 13.6 x 11.2 x 0.2 inches
    • Item Weight: 0.70 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12558013, 12574294
    • Part Description: 2003 GMC Sierra 2500 HD Rear Main Seal Gasket
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | Base, Denali, SL, SLE, SLT, WT | 8 Cyl 6.0 L BI-FUEL, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
    $30.08 MSRP: $47.74
    You Save: $17.66 (37%)
  • Gates Accessory Belt Drive Kit for 2003 GMC Sierra 2500 HD - 90K-38158C

    Gates® Accessory Belt Drive Kit for 2003 GMC Sierra 2500 HD

    PartNumber: 90K-38158C
    Product Specifications
    • Notes: {K060930, 38158, 36299}; W/145A. Alt.
    • Belt Outside Circumference: 93.585"
    • Belt Part Number: K060930
    • Belt Top Width: 0.807
    • Idler Pulley 1 Part Number: 36299
    • Tensioner Assembly Part Number: 38158
    • UPC: 770075755913
    • Part Description: 2003 GMC Sierra 2500 HD Accessory Belt Drive Kit
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 2500 HD | All Trims | 8 Cyl 6.0L
    $89.35
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