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Replacement and OEM Parts for GMC C2500 Idler Pulley
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GMC C2500 Idler Pulley

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  • OEM (Genuine) GMC C2500 Serpentine Idler Pulley

    PartNumber: 12580773
    OEM GMC C2500 Serpentine Idler Pulley - 12580773
    Product Specifications
    • Other Names: Idler Pulley, Serpentine Idler Pulley
    • Item Dimensions: 7.1 x 4.1 x 4.1 inches
    • Item Weight: 1.20 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 12557819
    • Part Description: GMC C2500 Serpentine Idler Pulley
    More Info
    $35.86 MSRP: $67.68
    You Save: $31.82 (48%)
  • Dorman OE Solutions Vacuum Pump Pulley for GMC C2500 - 300-702

    Dorman® OE Solutions Vacuum Pump Pulley for GMC C2500

    PartNumber: 300-702
    Product Specifications
    • Belt Type: Serpentine
    • Color: Black
    • Installation Hardware Included: No
    • Installation Instructions Included: No
    • Item Grade: Standard Replacement
    • Material: Steel
    • Mounting Hole Quantity: 1
    • OE Part Number: 15589757
    • Outside Diameter: 4.91
    • Package Contents: 1 Vacuum Pump Pulley
    • Pulley Type/Grooves: Smooth
    • UPC: 019495240006
    • Width: 0.98
    • Part Description: GMC C2500 OE Solutions Vacuum Pump Pulley
    More Info
    $77.20
  • Gates Drivealign Drive Belt Idler Pulley for GMC C2500 - 36177

    Gates® Drivealign Drive Belt Idler Pulley for GMC C2500

    PartNumber: 36177
    Product Specifications
    • 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: GMC C2500 Drivealign Drive Belt Idler Pulley
    More Info
    $29.47
  • Dayco No Slack Light Duty Idler Tensioner Pulley for GMC C2500 - 89170

    Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC C2500

    PartNumber: 89170
    Product Specifications
    • 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: GMC C2500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    $33.22
  • Four Seasons Drive Belt Idler Pulley for GMC C2500 - 45982

    Four Seasons® Drive Belt Idler Pulley for GMC C2500

    PartNumber: 45982
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: 0.625
    • Belt Width MM: 15.875
    • Bore Dia. IN: .67
    • Color: Black
    • Groove Quantity: 4
    • I.D. MM: 17
    • Inside Diameter: 0.6875
    • Material: Plastic
    • Meets / Exceeds OEM: Yes
    • Mount Hole Qty: 1
    • Mounting Hardware: Not Included
    • O.D. MM: 95.250
    • Outside Diameter: 3.750
    • Pulley Type: Idler Pulley
    • Pulley Width IN: .69
    • Pulley Width MM: Idler / Tensioner Pulley
    • Style: Idler / Tensioner Pulley
    • UPC: 096361459823
    • Width: 22.2
    • Part Description: GMC C2500 Drive Belt Idler Pulley
    More Info
    $23.06
  • Gates Drivealign Drive Belt Idler Pulley for GMC C2500 - 38015

    Gates® Drivealign Drive Belt Idler Pulley for GMC C2500

    PartNumber: 38015
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17 mm
    • Contact Surface: Smooth/Backside
    • Material: Thermoplastic
    • Number of Grooves: 0
    • Number Of Pulleys: 1
    • Outside Diameter: 76 mm
    • Pulley 1 Flanged: No
    • UPC: 072053472349
    • Width: 26 mm
    • Part Description: GMC C2500 Drivealign Drive Belt Idler Pulley
    More Info
    $24.27
  • Dayco No Slack Light Duty New Style Idler Tensioner Pulley for GMC C2500 - 89006

    Dayco® No Slack Light Duty New Style Idler Tensioner Pulley for GMC C2500

    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: GMC C2500 No Slack Light Duty New Style Idler Tensioner Pulley
    More Info
    $19.32
  • Four Seasons Idler Tensioner Pulley for GMC C2500 - 45935

    Four Seasons® Idler Tensioner Pulley for GMC C2500

    PartNumber: 45935
    Product Specifications
    • 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: GMC C2500 Idler Tensioner Pulley
    More Info
    $19.69
  • Gates Drivealign Drive Belt Idler Pulley for GMC C2500 - 38001

    Gates® Drivealign Drive Belt Idler Pulley for GMC C2500

    PartNumber: 38001
    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: 90 mm
    • Pulley 1 Flanged: No
    • UPC: 072053415254
    • Width: 30 mm
    • Part Description: GMC C2500 Drivealign Drive Belt Idler Pulley
    More Info
    $18.49
  • Dayco No Slack Light Duty Idler Tensioner Pulley for GMC C2500 - 89007

    Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC C2500

    PartNumber: 89007
    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: 76
    • Pulley Width: 31
    • UPC: 038244156955
    • Part Description: GMC C2500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    $16.27
  • Four Seasons Drive Belt Idler Pulley for GMC C2500 - 45066

    Four Seasons® Drive Belt Idler Pulley for GMC C2500

    PartNumber: 45066
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: 0.750
    • Belt Width MM: 19.050
    • 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: 88.900
    • Outside Diameter: 3.500
    • Pulley Type: Idler Pulley
    • Pulley Width IN: 1
    • Pulley Width MM: Idler / Tensioner Pulley
    • Style: Idler / Tensioner Pulley
    • UPC: 096361450660
    • Width: 25.4
    • Part Description: GMC C2500 Drive Belt Idler Pulley
    More Info
    $16.83
  • Gates Drivealign Drive Belt Idler Pulley for GMC C2500 - 38006

    Gates® Drivealign Drive Belt Idler Pulley for GMC C2500

    PartNumber: 38006
    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: GMC C2500 Drivealign Drive Belt Idler Pulley
    More Info
    $18.74
  • OEM (Genuine) GMC C2500 Idler Pulley

    PartNumber: 12552361
    OEM GMC C2500 Idler Pulley - 12552361
    Product Specifications
    • Other Names: Idler Pulley
    • Item Dimensions: 4.4 x 4.4 x 1.6 inches
    • Item Weight: 1.10 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: GMC C2500 Idler Pulley
    More Info
    $110.23 MSRP: $208.00
    You Save: $97.77 (48%)
  • Dayco No Slack Light Duty Idler Tensioner Pulley for GMC C2500 - 89015

    Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC C2500

    PartNumber: 89015
    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: 70
    • Pulley Width: 28.3
    • UPC: 036687135353
    • Part Description: GMC C2500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    $15.18
  • Four Seasons Drive Belt Idler Pulley for GMC C2500 - 45010

    Four Seasons® Drive Belt Idler Pulley for GMC C2500

    PartNumber: 45010
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: 0.875
    • Belt Width MM: 22.225
    • Bore Dia. IN: .69
    • Color: Black
    • Groove Quantity: 6
    • I.D. MM: 17.463
    • Inside Diameter: 0.6875
    • Material: Plastic
    • Meets / Exceeds OEM: Yes
    • Mount Hole Qty: 1
    • Mounting Hardware: Not Included
    • O.D. MM: 109.538
    • Outside Diameter: 4.3125
    • Pulley Type: Idler Pulley
    • Pulley Width IN: 1
    • Pulley Width MM: Idler / Tensioner Pulley
    • Style: Idler / Tensioner Pulley
    • UPC: 096361450103
    • Width: 25.4
    • Part Description: GMC C2500 Drive Belt Idler Pulley
    More Info
    $16.50
  • Gates Drivealign Drive Belt Idler Pulley for GMC C2500 - 38024

    Gates® Drivealign Drive Belt Idler Pulley for GMC C2500

    PartNumber: 38024
    Product Specifications
    • Bearing Bore Inside Diameter 1: 17 mm
    • Contact Surface: V-Ribbed
    • Material: Thermoplastic
    • Number of Grooves: 6
    • Number Of Pulleys: 1
    • Outside Diameter: 109 mm
    • Pulley 1 Flanged: Yes
    • UPC: 072053542004
    • Width: 26.3 mm
    • Part Description: GMC C2500 Drivealign Drive Belt Idler Pulley
    More Info
    $16.10
  • OEM (Genuine) GMC C2500 Idler Pulley

    PartNumber: 14103118
    OEM GMC C2500 Idler Pulley - 14103118
    Product Specifications
    • Other Names: Idler Pulley
    • Item Dimensions: 4.2 x 4.4 x 4.2 inches
    • Item Weight: 0.70 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: GMC C2500 Idler Pulley
    More Info
    $31.10 MSRP: $77.74
    You Save: $46.64 (60%)
  • Dayco No Slack Light Duty Idler Tensioner Pulley for GMC C2500 - 89009

    Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC C2500

    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: GMC C2500 No Slack Light Duty Idler Tensioner Pulley
    More Info
    $13.50
  • Four Seasons Drive Belt Idler Pulley for GMC C2500 - 45990

    Four Seasons® Drive Belt Idler Pulley for GMC C2500

    PartNumber: 45990
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: 1.000
    • Belt Width MM: 25.400
    • Bore Dia. IN: .47
    • Color: Black
    • Groove Quantity: Smooth
    • I.D. MM: 12.0
    • Inside Diameter: 0.46875
    • 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: 096361459908
    • Width: 25.4
    • Part Description: GMC C2500 Drive Belt Idler Pulley
    More Info
    $16.18
  • Gates Drivealign Drive Belt Idler Pulley for GMC C2500 - 38020

    Gates® Drivealign Drive Belt Idler Pulley for GMC C2500

    PartNumber: 38020
    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: 072053525748
    • Width: 30.5 mm
    • Part Description: GMC C2500 Drivealign Drive Belt Idler Pulley
    More Info
    $16.09
  • OEM (Genuine) GMC C2500 Serpentine Idler Pulley

    PartNumber: 12634218
    OEM GMC C2500 Serpentine Idler Pulley - 12634218
    Product Specifications
    • 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: GMC C2500 Serpentine Idler Pulley
    More Info
    $64.71 MSRP: $122.12
    You Save: $57.41 (48%)
  • Four Seasons Drive Belt Idler Pulley for GMC C2500 - 45976

    Four Seasons® Drive Belt Idler Pulley for GMC C2500

    PartNumber: 45976
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: 1.125
    • Belt Width MM: 28.575
    • Bore Dia. IN: .69
    • Color: Black
    • Groove Quantity: 6
    • I.D. MM: 17
    • Inside Diameter: 0.6875
    • Material: Plastic
    • Meets / Exceeds OEM: Yes
    • Mount Hole Qty: 1
    • Mounting Hardware: Not Included
    • O.D. MM: 95.250
    • Outside Diameter: 3.750
    • Pulley Type: Idler Pulley
    • Pulley Width IN: 1.125
    • Pulley Width MM: 28.6
    • Style: Idler / Tensioner Pulley
    • UPC: 096361459762
    • Width: 28.6
    • Part Description: GMC C2500 Drive Belt Idler Pulley
    More Info
    $16.89
  • Gates Drivealign Drive Belt Idler Pulley for GMC C2500 - 38019

    Gates® Drivealign Drive Belt Idler Pulley for GMC C2500

    PartNumber: 38019
    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: 3.54"
    • Pulley 1 Flanged: Yes
    • UPC: 072053557510
    • Width: 26.3 mm
    • Part Description: GMC C2500 Drivealign Drive Belt Idler Pulley
    More Info
    $15.36
  • OEM (Genuine) GMC C2500 Serpentine Idler Pulley

    PartNumber: 12580772
    OEM GMC C2500 Serpentine Idler Pulley - 12580772
    Product Specifications
    • Other Names: Idler Pulley, Serpentine Idler Pulley
    • Item Dimensions: 3.5 x 3.1 x 3.1 inches
    • Item Weight: 0.70 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 10239930
    • Part Description: GMC C2500 Serpentine Idler Pulley
    More Info
    $39.15 MSRP: $73.88
    You Save: $34.73 (48%)
  • Four Seasons Drive Belt Idler Pulley for GMC C2500 - 45975

    Four Seasons® Drive Belt Idler Pulley for GMC C2500

    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: GMC C2500 Drive Belt Idler Pulley
    More Info
    $13.76
  • Gates Drivealign Grooved Drive Belt Idler Pulley for GMC C2500 - 38008

    Gates® Drivealign Grooved Drive Belt Idler Pulley for GMC C2500

    PartNumber: 38008
    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: 2.76"
    • Pulley 1 Flanged: Yes
    • UPC: 072053284232
    • Width: 25 mm
    • Part Description: GMC C2500 Drivealign Grooved Drive Belt Idler Pulley
    More Info
    $15.85
  • Four Seasons Back Drive Belt Idler Pulley for GMC C2500 - 45979

    Four Seasons® Back Drive Belt Idler Pulley for GMC C2500

    PartNumber: 45979
    Product Specifications
    • Belt Type: Back Idler
    • Belt Width IN: 1.000
    • Belt Width MM: 25.400
    • Bore Dia. IN: .67
    • 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: 76.200
    • Outside Diameter: 3.000
    • Pulley Type: Idler Pulley
    • Pulley Width IN: 1.18
    • Pulley Width MM: Idler / Tensioner Pulley
    • Style: Idler / Tensioner Pulley
    • UPC: 096361459793
    • Width: 30
    • Part Description: GMC C2500 Back Drive Belt Idler Pulley
    More Info
    $13.63
  • Gates Drivealign Drive Belt Idler Pulley for GMC C2500 - 38009

    Gates® Drivealign Drive Belt Idler Pulley for GMC C2500

    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: GMC C2500 Drivealign Drive Belt Idler Pulley
    More Info
    $15.36
  • Four Seasons Drive Belt Idler Pulley for GMC C2500 - 45971

    Four Seasons® Drive Belt Idler Pulley for GMC C2500

    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: GMC C2500 Drive Belt Idler Pulley
    More Info
    $12.39
  • Four Seasons Drive Belt Idler Pulley for GMC C2500 - 45970

    Four Seasons® Drive Belt Idler Pulley for GMC C2500

    PartNumber: 45970
    Product Specifications
    • Belt Type: Serpentine
    • Belt Width IN: 1.000
    • Belt Width MM: 25.400
    • Bore Dia. IN: .67
    • Color: Black
    • Groove Quantity: Smooth
    • 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: 95.250
    • Outside Diameter: 3.750
    • Pulley Type: Back Idler
    • Pulley Width IN: 1
    • Pulley Width MM: 25.4
    • Style: Idler / Tensioner Pulley
    • UPC: 096361459700
    • Width: 25.4
    • Part Description: GMC C2500 Drive Belt Idler Pulley
    More Info
    $13.41
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About GMC C2500 Idler Pulley

The GMC C2500 was first released in 1987 as a conventional four-wheel-drive variant. Over the years, it has earned a great reputation by beating out competitors. The GMC C2500 comes with plenty of quality parts, including the idler pulley. There can be one or more idler pulleys along the timing chain and each can come in different sizes. A faulty GMC C2500 idler pulley can cause overheating, stalling, and a decline in tension.
The GMC C2500 provides a large selection of high-performance parts. But after a long time, the worn idler pulley might cause huge problems. The removal process for the GMC C2500 idler pulley is as follows. First, open the hood. Next, remove the engine drive belt. Then locate the idler pulley, remove the mounting bolt for the idler pulley, and remove the pulley from the engine. The GMC C2500 idler pulley should be replaced every 50,000 to 100,000 miles. Choose from a vast selection of auto parts at varied prices online. We have nearly all types of GMC C2500 parts in our catalog to give you a better vehicle both inside and out.