Description
Description: Alternator 33SI 24V 100A For ISB QSB 8.3L (No Core Charge)
Condition: New
Brand: Cummins
Part Number: 321-748
Other OEM Part Numbers That Will Work: 3072483, 90-01-4323N, 1-2558-00DR, 10459196, 10459251, 10459311, 10R-8755, 10R8755, 1200190007, 1255800DR, 12724522, 19011153, 19011175, 19011180, 19011192, 19011210, 240-33748, 240-754, 240-754A, 24033748, 240754, 240754A, 316-7251, 3167251, 321-748, 321-769, 321748, 321769, 3332213, 3400698, 3675214RX, 3675235RX, 400-12147, 400-12273, 4000590, 40012147, 40012273, 42777, 8085, 8085N, 8567, 8600333, 90-01-4323, 90-01-4423, 90014323, 90014423, 704901AT
Verify Fitment
Send us your truck's details and a real parts expert will confirm this part fits — usually within business hours the same day.
Shipping and Refund
At Truck To Trailer Parts, timely and reliable delivery is essential to your business. Most orders ship from our North Carolina warehouse, and in-stock parts ordered by 7:30 PM ET Monday–Friday typically ship the same business day.
Processing & Dispatch
Estimated shipping times below are transit times and don't include processing. In-stock parts ordered by 7:30 PM ET Mon–Fri usually leave the same business day; items that need extra prep ship within 24–48 hours. We dispatch Monday through Saturday, excluding major U.S. holidays. Need an exact estimate? Contact us — and note that address changes after dispatch may carry carrier fees, payable by the customer.
Shipping Methods & Transit Times
| Method | Transit time | Notes |
|---|---|---|
| Small Package Saver | 3–7 business days | Ideal for items under 10 lbs; most FREE SHIPPING items |
| Ground | 1–6 business days | Typically UPS, occasionally FedEx |
| Second Day Air | 2–3 business days | Contact sales to arrange |
| Next Day Air | 1–2 business days | Order by 7:30 PM ET Mon–Fri for same-day dispatch |
| Canada | 1–6 business days | Varies with customs clearance |
| Large Package Rate | 3–5 business days | Residential delivery of larger items |
| Will Call – Pickup | No shipping charge | Pick up at our North Carolina warehouse by request |
Free Shipping
We offer Free Shipping on eligible items within the contiguous 48 United States. Outside this region, we'll provide an accurate quote on request. Some oversized or freight items may not qualify unless specifically noted.
Freight & Oversize Shipments
Oversized shipments travel via Freight/LTL, designed for commercially zoned properties — deliveries to non-commercial addresses may carry additional charges. When receiving freight, inspect the package for damage and note exceptions on the delivery receipt before signing. Extra services like a lift gate incur carrier fees payable by the customer.
Canada & International
For Canadian shipments, customs duties, taxes and brokerage fees are the customer's responsibility — please pay promptly to avoid delays. We ship internationally too: if your location isn't supported at checkout, contact us for a custom quote. International customers are responsible for duties, taxes and customs charges.
Questions About Shipping?
+1 (877) 290-1637 (Monday – Friday, 8:00 AM – 10:30 PM ET)
support@trucktotrailerparts.com
2230 Smokey Park Hwy, Suite 114, Candler, NC 28715
