2022 GMC Sierra AT4 vs. 2022 Chevy Silverado Trail Boss: Mechanical Differences
The 2022 GMC Sierra AT4 and 2022 Chevy Silverado Trail Boss are similar in a number of ways – both are GM full-size pickups equipped for off-roading adventures, with the GM T1 body-on-frame platform under the skin. However, while these two vehicles do share quite a bit, there are numerous mechanical differences worth pointing out as well. Now, GM Authority is looking into the specific mechanical differences between the 2022 GMC Sierra AT4 and 2022 Chevy Silverado Trail Boss.
From the off, we need to mention that there are two trim levels for the 2022 Chevy Silverado Trail Boss, including the Silverado Custom Trail Boss and the Silverado LT Trail Boss, with certain features offered on one of the trim levels, but not the other.
With that covered, let’s take a closer look at the mechanical differences between the 2022 GMC Sierra AT4 and 2022 Chevy Silverado Trail Boss, starting with the drivetrain. Under the hood, the 2022 GMC Sierra AT4 is equipped as standard with the 3.0L I6 LM2 turbodiesel Duramax, which is rated at 277 horsepower and 460 pound-feet of torque. By contrast, the Silverado Custom Trail Boss and Silverado LT Trail Boss are both equipped as standard with the turbocharged 2.7L I4 L3B gasoline engine, rated at 310 horsepower and 420 pound-feet of torque.
The 3.0L I6 LM2 is optional in the Silverado Trail Boss models, while the L3B is not offered for the GMC Sierra AT4. The other two engines to mention include the naturally aspirated 5.3L V8 L84, rated at 355 horsepower and 383 pound-feet of torque, and offered as optional on the Silverado Trail Boss models, but not the GMC Sierra AT4. Finally, there’s the naturally aspirated 6.2L V8 L87 gasoline engine, rated at 420 horsepower and 460 pound-feet of torque, and offered as an optional upgrade for both GMC Sierra AT4 and Chevy Silverado LT Trail Boss models.
For a more complete breakdown of the mechanical differences between the 2022 GMC Sierra AT4 and 2022 Chevy Silverado Trail Boss, dive into the table below:
| RPO Code | Sierra AT4 | Silverado Custom Trail Boss | Silverado LT Trail Boss | |
|---|---|---|---|---|
| Turbocharged 2.7L I-4 gasoline engine | L3B | – | S | S |
| EcoTec3 5.3L V8 gasoline engine | L84 | – | A | A |
| Duramax 3.0L I-6 turbo-diesel engine | LM2 | S | A | A |
| EcoTec3 6.2L V8 gasoline engine | L87 | A | – | A |
| 8-speed automatic transmission | MQE | – | S | S |
| 10-speed automatic transmission | MQB | – | A | – |
| 10-speed automatic transmission | MQC | S | – | A |
| 10-speed automatic transmission | MHS | A | – | A |
| 10-speed automatic transmission | MHT | – | A | – |
| Autotrac two-speed electronic transfer case | NQH | S | S | S |
| Trailering Package with 7-pin and 4-pin connectors | Z82 | S | S | S |
| Single exhaust | NB5 | – | S | S |
| Dual exhaust with chrome tips | N10 | S | A | A |
| Hitch Guidance with Hitch View | PZ8 | S | – | A |
| Hill Descent Control | JHD | S | S | S |
| Skid Plates | NZZ | S | S | S |
| Off-Road Suspension with 2-inch factory installed lift and monotube shocks | Z7X | S | S | S |
| Integrated trailer brake controller | JL1 | S | A | A |
| In-vehicle Trailering App | UET | S | – | A |
| Trailer Tire Pressure Monitoring Sensors | PTT | A | – | A |
| Heavy-duty air filter | K47 | S | S | S |
| External engine oil cooler | KC4 | A | A | A |
| Auxiliary external transmission oil cooler | KNP | A | A | A |
| Auto-locking rear differential | G80 | S | S | S |
| Engine block heater | K05 | S | A | A |
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