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OEM (Genuine) GMC K2500 Serpentine Idler Pulley
PartNumber: 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 K2500 Serpentine Idler Pulley
$50.23 MSRP:$94.80You Save: $44.57 (48%)
Dorman® OE Solutions Vacuum Pump Pulley for GMC K2500
PartNumber: 300-702Product 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 K2500 OE Solutions Vacuum Pump Pulley
$80.03
Gates® Drivealign Drive Belt Idler Pulley for GMC K2500
PartNumber: 36177Product 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 K2500 Drivealign Drive Belt Idler Pulley
$36.61
Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC K2500
PartNumber: 89170Product 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 K2500 No Slack Light Duty Idler Tensioner Pulley
$35.76
Four Seasons® Drive Belt Idler Pulley for GMC K2500
PartNumber: 45982Product 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 K2500 Drive Belt Idler Pulley
$24.73
Gates® Drivealign Drive Belt Idler Pulley for GMC K2500
PartNumber: 38015Product 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 K2500 Drivealign Drive Belt Idler Pulley
$27.82
Dayco® No Slack Light Duty New Style Idler Tensioner Pulley for GMC K2500
PartNumber: 89006Product 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 K2500 No Slack Light Duty New Style Idler Tensioner Pulley
$20.80
Four Seasons® Idler Tensioner Pulley for GMC K2500
PartNumber: 45935Product 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 K2500 Idler Tensioner Pulley
$21.77
Gates® Drivealign Drive Belt Idler Pulley for GMC K2500
PartNumber: 38001Product 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 K2500 Drivealign Drive Belt Idler Pulley
$19.83
Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC K2500
PartNumber: 89007Product 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 K2500 No Slack Light Duty Idler Tensioner Pulley
$17.51
Four Seasons® Drive Belt Idler Pulley for GMC K2500
PartNumber: 45066Product 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 K2500 Drive Belt Idler Pulley
$18.07
Gates® Drivealign Drive Belt Idler Pulley for GMC K2500
PartNumber: 38006Product 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 K2500 Drivealign Drive Belt Idler Pulley
$20.09
OEM (Genuine) GMC K2500 Idler Pulley
PartNumber: 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 K2500 Idler Pulley
$2.93 MSRP:$5.51You Save: $2.58 (47%)
Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC K2500
PartNumber: 89015Product 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 K2500 No Slack Light Duty Idler Tensioner Pulley
$16.34
Four Seasons® Drive Belt Idler Pulley for GMC K2500
PartNumber: 45010Product 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 K2500 Drive Belt Idler Pulley
$16.40
Gates® Drivealign Drive Belt Idler Pulley for GMC K2500
PartNumber: 38024Product 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 K2500 Drivealign Drive Belt Idler Pulley
$19.70
Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC K2500
PartNumber: 89009Product 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 K2500 No Slack Light Duty Idler Tensioner Pulley
$14.52
Four Seasons® Drive Belt Idler Pulley for GMC K2500
PartNumber: 45990Product 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 K2500 Drive Belt Idler Pulley
$17.37
Gates® Drivealign Drive Belt Idler Pulley for GMC K2500
PartNumber: 38020Product 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 K2500 Drivealign Drive Belt Idler Pulley
$18.48
OEM (Genuine) GMC K2500 Serpentine Idler Pulley
PartNumber: 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 K2500 Serpentine Idler Pulley
$66.46 MSRP:$125.42You Save: $58.96 (48%)
Gates® Drivealign Drive Belt Idler Pulley for GMC K2500
PartNumber: 38019Product 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 K2500 Drivealign Drive Belt Idler Pulley
$17.63
OEM (Genuine) GMC K2500 Serpentine Idler Pulley
PartNumber: 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 K2500 Serpentine Idler Pulley
$54.91 MSRP:$103.62You Save: $48.71 (48%)
Four Seasons® Drive Belt Idler Pulley for GMC K2500
PartNumber: 45975Product 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 K2500 Drive Belt Idler Pulley
$14.77
Gates® Drivealign Grooved Drive Belt Idler Pulley for GMC K2500
PartNumber: 38008Product 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 K2500 Drivealign Grooved Drive Belt Idler Pulley
$16.58
Four Seasons® Back Drive Belt Idler Pulley for GMC K2500
PartNumber: 45979Product 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 K2500 Back Drive Belt Idler Pulley
$15.02
Gates® Drivealign Drive Belt Idler Pulley for GMC K2500
PartNumber: 38009Product 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 K2500 Drivealign Drive Belt Idler Pulley
$16.47
Four Seasons® Drive Belt Idler Pulley for GMC K2500
PartNumber: 45971Product 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 K2500 Drive Belt Idler Pulley
$13.64
Four Seasons® Drive Belt Idler Pulley for GMC K2500
PartNumber: 45970Product 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 K2500 Drive Belt Idler Pulley
$14.74
Four Seasons® Drive Belt Idler Pulley for GMC K2500
PartNumber: 45996Product Specifications- Belt Type: Serpentine
- Belt Width IN: 0.875
- Belt Width MM: 22.225
- 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: 69.850
- Outside Diameter: 2.750
- Pulley Type: Idler Pulley
- Pulley Width IN: 1.11
- Pulley Width MM: Idler / Tensioner Pulley
- Style: Idler / Tensioner Pulley
- UPC: 096361459960
- Width: 28.6
- Part Description: GMC K2500 Drive Belt Idler Pulley
$14.91
Dayco® No Slack Light Duty Idler Tensioner Pulley for GMC K2500
PartNumber: 89012Product 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: 90
- Pulley Width: 28.2
- UPC: 038244528783
- Part Description: GMC K2500 No Slack Light Duty Idler Tensioner Pulley
$22.75
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Next >About GMC K2500 Idler Pulley
The GMC K2500's look was somewhat altered in 1990. The GMC K2500 moves with the ease of a premium vehicle. Classic parts like the idler pulley contribute to the success of the brand. There can be one or more idler pulley parts along the timing chain and each can come in different sizes.
The GMC K2500 has many devices. But problems arise after the idler pulley has been used for a long period. An idler pulley provides tension and helps guide the belt to the proper routing. It should be replaced every 50,000 to 100,000 miles. Welcome to a large selection of related GMC K2500 parts available online. It is easy to buy needed car parts at nearly wholesale prices.