ACDelco provides a parts number location feature on its company website, as of 2015. Search options for part numbers and availability include by VIN, vehicle model or parts category.
From the homepage of the ACDelco website, select the Auto Parts tab on the top navigation bar. Click the Search Parts Catalog link. Enter the VIN, if known, and press Continue. Otherwise, select the year, make, model and engine number from the appropriate drop-downs. Follow any additional prompts to refine the vehicle selection.
Next, choose a part group and subgroup from the drop-downs to view a list of available parts for the vehicle and category. The part's number appears directly under its name.
For assistance, contact ACDelco at 800-223-3526 Monday through Friday from 8 a.m. to 8 p.m. EST.