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OEM (Genuine) 2003 GMC Sierra 3500 Serpentine Idler Pulley
PartNumber: 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
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
$54.20 MSRP:$102.28You Save: $48.08 (48%)
Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500
PartNumber: 36177Product 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
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$29.47
Dayco® No Slack Light Duty Idler Tensioner Pulley for 2003 GMC Sierra 3500
PartNumber: 89170Product 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
Vehicle Fitment- 2003 GMC Sierra 3500 | All Trims | 8 Cyl 6.6L
$33.22
OEM (Genuine) 2003 GMC Sierra 3500 Serpentine Tensioner
PartNumber: 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
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
$55.60 MSRP:$104.91You Save: $49.31 (48%)
Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500
PartNumber: 36299Product 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
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
PartNumber: 45935Product 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
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
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: 2003 GMC Sierra 3500 No Slack Light Duty New Style Idler Tensioner Pulley
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
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
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
$86.04 MSRP:$142.41You Save: $56.37 (40%)
Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500
PartNumber: 36169Product 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
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
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: 2003 GMC Sierra 3500 Drive Belt Idler Pulley
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
PartNumber: 89542Product 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
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
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
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
$29.26 MSRP:$55.21You Save: $25.95 (48%)
Gates® Drivealign Upper Drive Belt Idler Pulley for 2003 GMC Sierra 3500
PartNumber: 36310Product 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
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
PartNumber: 45071Product 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
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
PartNumber: 89165Product 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
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
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
Vehicle Fitment- 2003 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
$64.71 MSRP:$122.12You Save: $57.41 (48%)
Gates® Drivealign Drive Belt Idler Pulley for 2003 GMC Sierra 3500
PartNumber: 36239Product 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
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
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: 2003 GMC Sierra 3500 Drive Belt Idler Pulley
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
PartNumber: 89135Product 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
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
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: 2003 GMC Sierra 3500 Drivealign Drive Belt Idler Pulley
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
PartNumber: 45084Product 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
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
PartNumber: 89550Product 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
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
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: 2003 GMC Sierra 3500 No Slack Light Duty Idler Tensioner Pulley
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
PartNumber: 89051Product 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
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
01/11/2022Q: 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
01/11/2022Q: 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