Do Chevy gas trucks have Allison Transmission?
Chevy’s gasoline-powered pickups do not use Allison-branded transmissions. They rely on GM’s Hydra-Matic automatic transmissions, with different speed configurations depending on model and year. Allison transmissions have historically appeared behind GM’s diesel engines, not the standard gasoline varieties.
Chevy gas trucks: what powers the transmission
Below is a quick overview of how Chevrolet outfits its gas-powered trucks. The focus is on the transmission brand and the typical speed ratings used in recent generations. This section clarifies that Allison-branded units are not used for Chevy’s gas engines, while GM’s own Hydra-Matic automatics handle the duties.
- Chevrolet Silverado 1500 (gas engines): powered by GM Hydra-Matic automatic transmissions, with 8- or 10-speed configurations depending on model year and engine option (for example, 5.3L or 6.2L V8 versions commonly paired with a modern Hydra-Matic 10-speed in many recent years).
- Chevrolet Silverado 2500HD/3500HD (gas engines): also use GM Hydra-Matic automatics, typically in the 6- or 8-speed range depending on generation and configuration. These gas-power setups do not use Allison transmissions.
In short, Chevy’s gas-powered trucks rely on GM’s own Hydra-Matic family of automatics, not Allison-branded transmissions. The Allison name has been associated with GM’s diesel-heavy lineup in the past, but it is not the standard choice for current gasoline variants.
Allison transmissions in GM trucks: where they appear
To provide context, Allison transmissions have historically shown up in GM’s lineup behind diesel powertrains in heavier-duty applications. Here is where they have shown up in GM trucks, and where they do not apply to gasoline versions.
- Duramax diesel-equipped GM heavy-duty trucks (such as Silverado 2500HD/3500HD in certain generations): Allison automatic transmissions have been used behind the Duramax diesel engines in some model years and configurations.
- Gas-powered GM trucks: current gasoline Silverado/Sierra models are not equipped with Allison transmissions; they use GM’s Hydra-Matic automatics.
Thus, while Allison transmissions have a role in GM’s diesel-heavy heavy-duty lineup, Chevy’s gasoline trucks rely on GM’s Hydra-Matic transmissions for their automatic shifting needs.
Summary
Bottom line: Chevy gas trucks do not come with Allison transmissions. They are equipped with GM’s Hydra-Matic automatics (8-, 10-, or other configurations depending on model year and engine). Allison-branded units have historically been used with Duramax diesel-powered GM trucks in the past, but they are not standard on current gas-powered Silverado/Sierra models.
What Chevy trucks have an Allison Transmission?
Chevy's medium-duty (MD) Silverado trucks, such as the 4500HD, 5500HD, and 6500HD, are the primary models that feature a true Allison Transmission. While heavy-duty (HD) Silverado 2500HD and 3500HD models used Allison-branded transmissions built by GM, their licensing agreement ended, so the branding is being phased out on these pickups.
Medium-Duty (MD) Silverado Trucks
- Models: Silverado 4500HD, 5500HD, and 6500HD.
- Transmission: These trucks are equipped with a true Allison transmission, not one built by GM.
Heavy-Duty (HD) Silverado Trucks
- Models: Silverado 2500HD and 3500HD.
- Transmission: These trucks are no longer using Allison-branded transmissions after the licensing agreement with Allison Transmission expired at the end of 2025.
- Note: The 10-speed automatic transmission in the HD trucks from 2020 onward was designed and built by GM, but it carried an Allison badge due to the partnership. The performance and design have not changed, but the branding has been removed.
Does the 6.6 gas have Allison Transmission?
Yes, the 6.6L gas engine can be paired with an Allison 10-speed automatic transmission, available on models like the 2024 and 2025 Chevrolet Silverado HD. This combination offers improved performance and towing capability compared to older 6-speed automatic transmissions, providing an upgrade that was previously exclusive to the 6.6L Duramax diesel engine.
- Available option: The Allison 10-speed is now an optional transmission for the 6.6L V8 gas engine, not just the Duramax diesel.
- Performance: The new transmission is expected to enhance performance and towing capability for the gas engine.
- Model years: This pairing is available on recent models, such as the 2024 and 2025 Chevrolet Silverado HD.
Do they put Allison transmissions in gas trucks?
Allison transmissions pair with all propulsion solutions, including diesel, electric or natural gas.
Can you get an Allison Transmission in a 1500 Silverado?
This will have a true Allison transmission it's a six-speed automatic transmission not this exact one this is a badass one i'm at the SEMA. Show here in Las Vegas it's the only 6500.
