This is the heavy-duty gas V8 GM specified for its medium-duty chassis: strong low-end torque for launches and grades, big-block durability from proven castings and a stout bottom end, and a factory-style accessory drive layout for straightforward installation. It is calibrated for medium-duty use with consistent performance in heat and heavy traffic, compatible with OEM engine management for proper idle, drivability, and emissions, and designed to run cool under load with ample oiling and cooling capacity.
This engine replaces high-mileage and oil-consuming originals. Vocational trucks pile on idle hours and loaded miles that eventually tire any bottom end, and a sound L18 restores the solid starts, consistent torque, and easy servicing that keep a work truck on schedule.
| Detail | Description |
|---|---|
| INCLUDED | The engine assembly as photographed. |
| NOT INCLUDED | ECM typically not included; harness inclusion varies by unit, confirmed on the inclusions line at order. |
| Tools You Need | Medium-duty rated hoist and stand, fresh fluids and filters, and break-in discipline. |
| Detail | Description |
|---|---|
| Chevrolet Kodiak C5500 (donor 2003) | VIN confirmed at order |
| GMC TopKick C5500 | Yes, same GM platform |
| Diesel-equipped chassis | Not as a drop-in; gas-to-diesel swaps require extensive fuel, electrical, emissions, and driveline changes |
| Reference Application | 2003 Chevrolet Kodiak C5500 |
Call (240) 301-0095 with your VIN. Kodiak or TopKick, we confirm the chassis, year, and inclusions line before the pallet ships.
This is a used engine, inspected before shipping:
| Engine Family | Vortec 8100 big-block V8 (RPO L18) |
|---|---|
| Block Material | Cast iron |
| Bore X Stroke | 4.250in x 4.370in |
| Displacement | 8.1L / 496 cu in |
| Horsepower | 325hp @ 4,000rpm |
| Torque | 450lb-ft @ 2,800rpm |
| Application | 2003 Chevrolet Kodiak C5500 |
| Sku | vaz682 |
| Price | $3,299.00 |
To file a claim, contact us within 15 days of delivery at (240) 301-0095 or support@vazautosolutions.com.
