Caterpillar
Caterpillar D550 GC Legacy Genset
GC Diesel Generator Sets
Caterpillar D550 GC Legacy Genset discontinued/non-current GC diesel generator set. Cat H-CPC marks the source page as Non-Current and links the official LEHE2012-06 Cat GC spec sheet validating the 550 ekW standby rating.
Chat on WhatsApp about this engine
Opens WhatsApp with Caterpillar D550 GC Legacy Genset and this page link filled in.
- Manufacturer files
- 1 datasheet
- Last updated
- 2026-08-11
- Package route
- diesel generator sets
- Electrical Output
- 550 kW
- Cylinders
- L6
- Displacement
- 18.1 L
- Rated Speed
- 1,500 RPM
Caterpillar D550 GC Legacy Genset generator set context
The Caterpillar D550 GC Legacy Genset is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 550 kW / standby rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
Also searched as
Technical Specifications
| Brand | Caterpillar |
| Model | D550 GC Legacy Genset |
| Series | GC Diesel Generator Sets |
| Configuration | C18 ATAAC inline-6 four-cycle diesel generator-set engine |
| Cylinders | 6 |
| Displacement | 18.1 L |
| Compression Ratio | 14.5:1 |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA certified stationary emergency application |
| Certifications | Caterpillar Non-Current product page, EPA stationary emergency application |
| Country of Origin | United States |
Frequently asked questions
What fuel does the Caterpillar D550 GC Legacy Genset use?
The Caterpillar D550 GC Legacy Genset is a diesel generator-set engine.
What is the displacement and cylinder configuration of the D550 GC Legacy Genset?
The Caterpillar D550 GC Legacy Genset is an inline-6 (6-cylinder) engine with a displacement of 18.1 L.
What emissions standard does the D550 GC Legacy Genset meet?
The Caterpillar D550 GC Legacy Genset is certified to U.S. EPA certified stationary emergency application emissions standards.
Is the D550 GC Legacy Genset still in production?
No — the Caterpillar D550 GC Legacy Genset is discontinued. Its specifications and datasheets remain archived here for reference.
Is a datasheet available for the D550 GC Legacy Genset?
Yes — an official Caterpillar datasheet for the Caterpillar D550 GC Legacy Genset can be downloaded from this page.