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2003 GMC Sierra 3500
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24 Products found

3 Q&A for Idler Pulley Repair
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  • OEM (Genuine) 2003 GMC Sierra 3500 Serpentine Idler Pulley

    PartNumber: 12669569
    OEM 2003 GMC Sierra 3500 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 3500 Serpentine Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
    $52.78 MSRP: $99.60
    You Save: $46.82 (48%)
  • Gates Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 36177

    Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 36177
    Product Specifications
    • Notes: w/o AC
    • Bearing Bore Inside Diameter 1: 12 mm
    • Contact Surface: V-Ribbed Grooved
    • Material: Steel
    • Number of Grooves: 6
    • Number Of Pulleys: 1
    • Outside Diameter: 85 mm
    • Pulley 1 Flanged: Yes
    • UPC: 072053392852
    • Width: 29 mm
    • Part Description: 2003 GMC Sierra 3500 Drivealign Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
    $37.50
  • Dayco No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 89170

    Dayco® No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500

    PartNumber: 89170
    Product Specifications
    • Notes: w/o AC
    • Bearing Inner Diameter 1: 12
    • Bearing Width: 12
    • Belt Type: Serpentine
    • Flat: N
    • Groove Quantity: 6
    • Material: Steel
    • Max Belt Width: 06 Rib
    • Number of Bearings: 1
    • Pulley Outside Diameter: 90
    • Pulley Width: 30
    • UPC: 036687655264
    • Part Description: 2003 GMC Sierra 3500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
    $33.22
  • OEM (Genuine) 2003 GMC Sierra 3500 Serpentine Tensioner

    PartNumber: 12580196
    OEM 2003 GMC Sierra 3500 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 3500 Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
    $54.13 MSRP: $102.15
    You Save: $48.02 (48%)
  • Gates Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 36299

    Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 36299
    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: 2003 GMC Sierra 3500 Drivealign Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    $25.40
  • Four Seasons Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 45935

    Four Seasons® Idler Tensioner Pulley for 2003 GMC Sierra 3500

    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 3500 Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
    $19.69
  • Dayco No Slack Light Duty New Style Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 89006

    Dayco® No Slack Light Duty New Style Idler Tensioner Pulley for 2003 GMC Sierra 3500

    PartNumber: 89006
    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: 2003 GMC Sierra 3500 No Slack Light Duty New Style Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
    $19.32
  • OEM (Genuine) 2003 GMC Sierra 3500 Serpentine Tensioner

    PartNumber: 98094201
    OEM 2003 GMC Sierra 3500 Serpentine Tensioner - 98094201
    Product Specifications
    • Notes: 6.6 Liter Turbo Diesel; All Models; 6.6l
    • Other Names: Belt Tensioner, Serpentine Tensioner
    • Item Dimensions: 7.0 x 6.3 x 4.3 inches
    • Item Weight: 1.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 97288625, 97329062
    • Part Description: 2003 GMC Sierra 3500 Serpentine Tensioner
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
    $83.78 MSRP: $138.67
    You Save: $54.89 (40%)
  • Gates Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 36169

    Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 36169
    Product Specifications
    • Bearing Bore Inside Diameter 1: 12 mm
    • Contact Surface: Smooth/Backside
    • Material: Steel
    • Number of Grooves: 0
    • Number Of Pulleys: 1
    • Outside Diameter: 60 mm
    • Pulley 1 Flanged: No
    • UPC: 072053392777
    • Width: 21.25 mm
    • Part Description: 2003 GMC Sierra 3500 Drivealign Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    $24.88
  • Four Seasons Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 45975

    Four Seasons® Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 45975
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: 1.000
    • Belt Width MM: 25.400
    • Bore Dia. IN: .69
    • Color: Black
    • Groove Quantity: Smooth
    • I.D. MM: 17
    • Inside Diameter: 0.6875
    • Material: Steel
    • Meets / Exceeds OEM: Yes
    • Mount Hole Qty: 1
    • Mounting Hardware: Not Included
    • O.D. MM: 88.900
    • Outside Diameter: 3.500
    • Pulley Type: Back Idler
    • Pulley Width IN: 1
    • Pulley Width MM: 25.4
    • Style: Idler / Tensioner Pulley
    • UPC: 096361459755
    • Width: 25.4
    • Part Description: 2003 GMC Sierra 3500 Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
    $13.76
  • Dayco No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 89542

    Dayco® No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500

    PartNumber: 89542
    Product Specifications
    • Notes: Steel Pulley, 12mm Bearing ID, Fits OE Tensioner;Steel Pulley, 12mm Bearing ID
    • Bearing Inner Diameter 1: 12
    • Bearing Width: 8
    • Belt Type: Serpentine
    • Flat: Y
    • Material: Steel
    • Max Belt Width: 04 Rib
    • Number of Bearings: 1
    • Pulley Outside Diameter: 60
    • Pulley Width: 21
    • UPC: 036687843036
    • Part Description: 2003 GMC Sierra 3500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    $21.65
  • OEM (Genuine) 2003 GMC Sierra 3500 Serpentine Idler Pulley

    PartNumber: 98057284
    OEM 2003 GMC Sierra 3500 Serpentine Idler Pulley - 98057284
    Product Specifications
    • Notes: 6.6 Liter Turbo Diesel, Smooth
    • Other Names: Idler Pulley, Serpentine Idler Pulley
    • Item Dimensions: 4.4 x 4.2 x 2.2 inches
    • Item Weight: 1.10 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 97209546, 98072072, 97233352
    • Part Description: 2003 GMC Sierra 3500 Serpentine Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
    $28.48 MSRP: $53.75
    You Save: $25.27 (48%)
  • Gates Drivealign Upper Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 36310

    Gates® Drivealign Upper Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 36310
    Product Specifications
    • Notes: w/AC
    • Bearing Bore Inside Diameter 1: 10 mm
    • Contact Surface: Smooth/Backside
    • Material: Steel
    • Number of Grooves: 0
    • Number Of Pulleys: 1
    • Outside Diameter: 2.99"
    • Pulley 1 Flanged: No
    • UPC: 072053394184
    • Width: 31.5 mm
    • Part Description: 2003 GMC Sierra 3500 Drivealign Upper Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
    $23.82
  • Four Seasons Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 45071

    Four Seasons® Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 45071
    Product Specifications
    • Notes: Smooth
    • Belt Type: Serpentine
    • Belt Width IN: 1.000
    • Belt Width MM: 25.400
    • Bore Dia. IN: .399
    • Color: Black
    • Groove Quantity: Smooth
    • I.D. MM: 10.160
    • Inside Diameter: 0.390625
    • Material: Steel
    • Meets / Exceeds OEM: Yes
    • Mount Hole Qty: 1
    • Mounting Hardware: Not Included
    • O.D. MM: 76.200
    • Outside Diameter: 3.000
    • Pulley Type: Back Idler
    • Pulley Width IN: 1.18
    • Pulley Width MM: 30
    • Style: Idler / Tensioner Pulley
    • UPC: 096361450714
    • Width: 30
    • Part Description: 2003 GMC Sierra 3500 Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
    $11.25
  • Dayco No Slack Upper Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 89165

    Dayco® No Slack Upper Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500

    PartNumber: 89165
    Product Specifications
    • Notes: Single Alt.;Dual Alts.
    • Bearing Inner Diameter 1: 10.15
    • 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: 30
    • UPC: 036687653963
    • Part Description: 2003 GMC Sierra 3500 No Slack Upper Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
    $19.94
  • OEM (Genuine) 2003 GMC Sierra 3500 Serpentine Idler Pulley

    PartNumber: 12634218
    OEM 2003 GMC Sierra 3500 Serpentine Idler Pulley - 12634218
    Product Specifications
    • Notes: 6.6 Liter Turbo Diesel, Grooved
    • Other Names: Idler Pulley, Pulley, Serpentine Idler Pulley
    • Item Dimensions: 4.3 x 4.3 x 2.1 inches
    • Item Weight: 0.90 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 14102597
    • Part Description: 2003 GMC Sierra 3500 Serpentine Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
    $63.01 MSRP: $118.90
    You Save: $55.89 (48%)
  • Gates Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 36239

    Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 36239
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17 mm
    • Contact Surface: V-Ribbed Grooved
    • Material: Steel
    • Number of Grooves: 6
    • Number Of Pulleys: 1
    • Outside Diameter: 70 mm
    • Pulley 1 Flanged: No
    • UPC: 072053393460
    • Width: 23 mm
    • Part Description: 2003 GMC Sierra 3500 Drivealign Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
    $20.22
  • Four Seasons Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 45971

    Four Seasons® Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 45971
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: .88
    • Belt Width MM: 22.4
    • Bore Dia. IN: .67
    • Color: Black
    • Groove Quantity: 6
    • I.D. MM: 17
    • Inside Diameter: 0.671875
    • Material: Plastic
    • Meets / Exceeds OEM: Yes
    • Mount Hole Qty: 1
    • Mounting Hardware: Not Included
    • O.D. MM: 76.0
    • Outside Diameter: 2.99
    • Pulley Type: Idler Pulley
    • Pulley Width IN: 1.13
    • Pulley Width MM: 28.7
    • Style: Idler / Tensioner Pulley
    • UPC: 096361459717
    • Width: 28.7
    • Part Description: 2003 GMC Sierra 3500 Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
    $12.39
  • Dayco No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 89135

    Dayco® No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500

    PartNumber: 89135
    Product Specifications
    • Bearing Inner Diameter 1: 17
    • Bearing Width: 12
    • Belt Type: Serpentine
    • Flat: Y
    • Material: Steel
    • Max Belt Width: 04 Rib
    • Number of Bearings: 1
    • Pulley Outside Diameter: 63.3
    • Pulley Width: 17.75
    • UPC: 036687614834
    • Part Description: 2003 GMC Sierra 3500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
    $16.04
  • Gates Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 38009

    Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 38009
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17 mm
    • Contact Surface: V-Ribbed Grooved
    • Material: Thermoplastic
    • Number of Grooves: 6
    • Number Of Pulleys: 1
    • Outside Diameter: 2.99"
    • Pulley 1 Flanged: Yes
    • UPC: 072053284256
    • Width: 25 mm
    • Part Description: 2003 GMC Sierra 3500 Drivealign Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
    $15.36
  • Four Seasons Drive Belt Idler Pulley for 2003 GMC Sierra 3500 - 45084

    Four Seasons® Drive Belt Idler Pulley for 2003 GMC Sierra 3500

    PartNumber: 45084
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: 0.500
    • Belt Width MM: 15.9
    • Bore Dia. IN: .67
    • Color: Black
    • Groove Quantity: Smooth
    • I.D. MM: 17
    • Inside Diameter: 0.671875
    • Material: Steel
    • Meets / Exceeds OEM: Yes
    • Mount Hole Qty: 1
    • Mounting Hardware: Not Included
    • O.D. MM: 63.500
    • Outside Diameter: 2.48
    • Pulley Type: Idler Pulley
    • Pulley Width IN: 0.71
    • Pulley Width MM: Idler Pulley
    • Style: Idler Pulley
    • UPC: 096361085718
    • Width: 17.5
    • Part Description: 2003 GMC Sierra 3500 Drive Belt Idler Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
    $10.53
  • Dayco No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 89550

    Dayco® No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500

    PartNumber: 89550
    Product Specifications
    • Notes: Plastic Pulley, 17mm Bearing ID;Plastic Pulley, 17mm Bearing ID, Fits Dayco Tensioner
    • Bearing Inner Diameter 1: 17
    • Bearing Width: 12
    • Belt Type: Serpentine
    • Flat: Y
    • Material: Polymer
    • Max Belt Width: 04 Rib
    • Number of Bearings: 1
    • Pulley Outside Diameter: 60
    • Pulley Width: 20
    • UPC: 036687845047
    • Part Description: 2003 GMC Sierra 3500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    $15.96
  • Dayco No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 89009

    Dayco® No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500

    PartNumber: 89009
    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: 2003 GMC Sierra 3500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.0L
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 8.1L
    $13.50
  • Dayco No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500 - 89051

    Dayco® No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500

    PartNumber: 89051
    Product Specifications
    • Bearing Inner Diameter 1: 17
    • Bearing Width: 12
    • Belt Type: Serpentine
    • Flat: N
    • Groove Quantity: 6
    • Material: Steel
    • Max Belt Width: 06 Rib
    • Number of Bearings: 1
    • Pulley Outside Diameter: 76
    • Pulley Width: 30.1
    • UPC: 036687308733
    • Part Description: 2003 GMC Sierra 3500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    Vehicle Fitment
    • 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
    $15.70

FAQ for Idler Pulley Repair

Q: How to install the idler pulley?
A:
You can install the drive belt idler pulley and bolt to the generator bracket, and the drive belt, and tighten the drive belt idler pulley bolt.
By Bob
GM Specialist
01/11/2022
Q: What is the recommended bolt torque for the idler pulley?
A:
The recommended bolt torque is 50 Nm (37 ft. lbs.).
By Bob
GM Specialist
01/11/2022
Q: How to remove the idler pulley?
A:
You can loosen the drive belt idler pulley bolt, remove the accessory drive belt, and the drive belt idler pulley and bolt.
By Bob
GM Specialist
01/11/2022