Description
Product Overview
The ACDelco Idler Pulley B 38001 is a high‑quality, machined‑steel idler pulley designed for General Motors vehicles and many other makes. Weighing just 10.2 ounces and measuring 3.6 x 3.6 x 2 inches, it provides a compact yet robust solution for belt alignment. Its exterior is precision‑machined for a perfect fit, meeting OEM specifications (Part No. 88909582) and ensuring seamless integration with existing engine components.
![[Product front view showing all components]](https://www.swiftpicks.store/wp-content/uploads/2026/06/6b2ba3b8b1be4f2db2cf5ea3d99e4cfd.jpg)
Usage
This idler pulley is ideal for any application where the drive belt must stay correctly tensioned and aligned, such as during engine cooling, alternator operation, or power steering. It suits both DIY enthusiasts and professional mechanics performing routine maintenance or belt replacement on GM models and compatible aftermarket vehicles.
Why Choose Us
Choosing the ACDelco Idler Pulley means selecting a part that matches original equipment quality while offering the reliability of a premium aftermarket component. Each pulley is manufactured to strict tolerances, guaranteeing fit, form, and function. Backed by ACDelco’s reputation and a robust customer support network, you receive a product you can trust for long‑term performance.
Key Features
- Precision‑machined steel construction delivers superior durability and resistance to wear.
- Ensures proper belt alignment, reducing noise and extending belt life.
- Exact OEM fit for GM vehicles and many other makes, eliminating guesswork.
- Lightweight design (10.2 oz) simplifies installation and reduces rotating mass.
- Supported by ACDelco’s customer service and warranty for peace of mind.
FAQ
Will this pulley fit my 2005 Chevrolet Silverado?
Yes, the 38001 idler pulley is compatible with most GM models, including the 2005 Silverado, as it matches the original equipment specifications.
Do I need any special tools to install the pulley?
Standard pulley removal and installation tools are sufficient. A torque wrench is recommended to secure the bolt to the manufacturer’s torque setting.
Is this part covered by a warranty?
ACDelco provides a limited warranty on this idler pulley, covering defects in material and workmanship.
Can I use this pulley on a non‑GM vehicle?
While designed for GM applications, the pulley fits many other makes that share the same OEM specifications. Verify the part number compatibility before purchase.
How does this pulley improve belt life?
By maintaining correct belt tension and alignment, the pulley reduces slippage and wear, which helps extend the service interval of the drive belt.





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