Chevrolet Silverado 2500 HD Alternators
We stock Genuine OEM Chevrolet Alternators for your Chevrolet Silverado 2500 HD. OEM alternators play a critical role in your vehicle's electrical system, generating power to keep your battery charged and ensuring that all electrical components are functioning properly. They are designed to fit your vehicle's specifications, ensuring optimal performance and compatibility. Choosing OEM alternators over aftermarket options ensures that you are getting a product that is manufactured to the highest quality standards, providing greater reliability, durability, and long-term savings. Manufacturer's Warranty Included. Guaranteed Fit. Experts standing by.
Engine Harness
GM
86595809
6.6L gas, without dual alternators, 2wd.
$346.37
MSRP $566.47
Save $220.10
38.9% Off Engine Harness
GM
86595811
6.6L gas, with dual alternators, 2wd.
$370.67
MSRP $691.22
Save $320.55
46.4% Off 
Engine Harness
GM
85082406
6.6L diesel, with dual alternators, 2wd.
$297.77
MSRP $486.98
Save $189.21
38.9% Off Engine Harness
GM
85082409
6.6L diesel, without dual alternators, 4wd.
$342.27
MSRP $559.75
Save $217.48
38.9% Off Engine Harness
GM
85082408
6.6L diesel, with dual alternators, 4wd.
$337.19
MSRP $551.46
Save $214.27
38.9% Off Engine Harness
GM
86595808
6.6L gas, with dual alternators, 4wd.
$387.61
MSRP $633.91
Save $246.30
38.9% Off 
Belt
GM
12732424
Silverado, Sierra 2500 HD. 6.6L diesel, with dual alternators. Silverado, Sierra 3500 HD.
$26.41
MSRP $52.81
Save $26.40
50% Off 
Serpentine Belt
GM
12732504
Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. 6.6L gas, with dual alternators.
$24.82
MSRP $43.26
Save $18.44
42.6% Off 
2020-2023 GM - V-Ribbed Serpentine Belt
GM
12732707
Silverado, Sierra 2500 HD. 6.6L diesel, without dual alternators. Silverado, Sierra 3500 HD.
$23.82
MSRP $41.51
Save $17.69
42.6% Off 
Idler Pulley
GM
12729056
Silverado, Sierra 2500 HD. Lower. 6.6L gas, with dual alternators, smooth. Silverado, Sierra 3500 HD.
$92.41
MSRP $172.32
Save $79.91
46.4% Off 
2024 GM - Accessory Drive Belt Tensioner Assembly
GM
12717891
Silverado, Sierra 2500 HD. Accessory. Silverado, Sierra 3500 HD. 6.6L diesel, without dual alternators, drive belt.
$70.87
MSRP $113.91
Save $43.04
37.8% Off 
2020-2024 GM - Drive Belt Idler Pulley
GM
12729057
Silverado, Sierra 2500 HD. Lower. Ribbed. 6.6L gas, with dual alternators, grooved. Silverado, Sierra 3500 HD.
$60.91
MSRP $111.60
Save $50.69
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