The Chevrolet Silverado 4500HD and 5500HD are serious commercial platforms — Chevy’s answer to the Ford F-450/F-550 and Ram 4500/5500 in the medium-duty work truck segment. If you’re upfitting a Chevy medium duty chassis cab, here’s what you need to know about cab-to-axle measurements, body compatibility, and the best brands available at Star Truck Equipment in Wharton, TX.
Chevy Silverado 4500HD vs 5500HD: Key Differences
| Spec | Silverado 4500HD | Silverado 5500HD |
|---|---|---|
| GVWR | Up to 14,500 lb | Up to 19,500 lb |
| Payload | ~6,500–7,500 lb | ~9,000–11,000 lb |
| Engine | 6.6L Duramax Diesel or 6.0L Gas | 6.6L Duramax Diesel or 6.0L Gas |
| Rear Axle | Dual rear wheel (DRW) | Dual rear wheel (DRW) |
| CA Lengths | 60″, 84″, 108″ | 60″, 84″, 108″, 132″ |
| Max Body Length | Up to ~14 ft | Up to ~20 ft |
| Best For | Service bodies, flatbeds, utility bodies | Crane bodies, dump, mechanics trucks |
| Towing (5th wheel) | Up to 23,500 lb | Up to 23,500 lb |
Understanding Silverado 4500HD/5500HD Cab-to-Axle (CA) Measurements
Like all chassis cabs, the Silverado 4500HD and 5500HD are sold without a factory bed. The cab-to-axle (CA) measurement is the critical spec for determining what body fits your chassis:
- 60″ CA — Short wheelbase, suited for compact service bodies and short flatbeds (7–9 ft bodies). Best for urban delivery and light utility work.
- 84″ CA — The most popular CA. Fits 9–12 ft bodies across all major body types. The sweet spot for contractors, oilfield, and ranching use.
- 108″ CA — For longer bodies (12–16 ft flatbeds, extended service bodies). Good choice for the 5500HD when max bed length is needed.
- 132″ CA (5500HD only) — Maximum CA for very long bodies up to 18–20 ft. Niche use cases like long crane configurations and specialty dump bodies.
Best Flatbeds for Chevy Silverado 4500HD and 5500HD
The Silverado 4500HD and 5500HD are excellent flatbed platforms, especially with the 84″ or 108″ CA. Both steel and aluminum flatbeds mount cleanly to the Chevy chassis:
- CM Truck Beds — ER, RD, and TM Flatbeds — CM’s most popular steel flatbed models. The CM ER flatbed is a top seller on Silverado 4500HD 84″ CA configurations. Available in multiple lengths and rail heights. Strong fitment on Chevy chassis cabs.
- Norstar SD and ST Flatbeds — Heavy-duty steel flatbeds with clean fit on Silverado chassis. Popular choice for Texas ranchers and contractors who want a thick-gauge, durable flatbed without paying premium prices.
- Bedrock Diamond and Granite Series — Powder-coated steel flatbeds with bolt-together construction. The Bedrock Diamond Series fits cleanly on Silverado 4500HD 84″ CA configurations.
- NXG Flatbeds — Competitively priced steel flatbeds with good fitment on Chevy chassis cabs. A strong value option for budget-conscious buyers.
Best Service Bodies for Silverado 4500HD
The Silverado 4500HD is a go-to platform for steel service bodies in contractor, utility, and government fleet applications:
- RKI Service Bodies — Made in Houston, TX. Steel service bodies with deep compartments and excellent build quality. Short lead times thanks to local manufacturing. RKI is a top choice for Chevy fleet operators across South Texas.
- CM Service Bodies — Heavy-duty steel service bodies in 9 ft and 11 ft configurations. Fits Silverado 4500HD 84″ CA well. Good option for electricians, plumbers, and HVAC technicians.
Best Crane Bodies for Silverado 5500HD
When you need crane body capacity, the Silverado 5500HD’s higher GVWR gives you the payload to support crane mounting, outriggers, and tool storage simultaneously:
- STI Crane Bodies — The strongest crane body option for Silverado 5500HD applications. STI crane bodies are purpose-built for outrigger installation and Tiger Crane integration. Used throughout Texas and Louisiana oilfield operations.
- RKI Crane Bodies — Houston-made crane body platform with solid fitment on Chevy 5500HD chassis. Competitive pricing and available with multiple crane size configurations.
Duramax Diesel vs Gas for Medium Duty Chevy
The 6.6L Duramax diesel is the overwhelming choice for commercial Silverado 4500HD and 5500HD buyers in Texas. Reasons:
- Significantly more torque for heavy payload and towing applications
- Better long-term fuel economy under commercial load cycles
- Lower total cost of ownership over a 5–10 year commercial life
- The 6.0L gas engine is an option for lighter-duty, cost-sensitive buyers who don’t push the truck hard daily
Get Your Silverado 4500HD or 5500HD Upfitted in Wharton, TX
Star Truck Equipment in Wharton, TX installs flatbeds, service bodies, crane bodies, and more on Chevy Silverado 4500HD and 5500HD chassis cabs. We serve contractors, ranchers, oilfield operators, and commercial fleets across Texas and Louisiana.
Call us at (979) 532-1486 to discuss your Silverado chassis cab build, get a quote, and schedule your installation at our Wharton shop.