General Motors unveiled the refreshed 2022 GMC Sierra last October, pulling the sheets off a fully updated half-ton pickup with a long list of updates and changes. Among these was a torque boost for the turbocharged 2.7L I4 L3B gasoline engine, uprated from 348 to 420 pound-feet of torque. Now, however, GM Authority has confirmed with GM that the high-output L3B in the refreshed 2022 Sierra produces even more twist than originally announced, officially rating the four-banger at 430 pound-feet of torque.
GM Authority was the first to report in December of 2021 that the turbocharged 2.7L I4 L3B gasoline engine in GM’s updated Light Duty pickup models would be SAE-certified at 430 pound-feet of torque, rather than the initially-announced figure of 420 pound-feet.
Before the debut of the refreshed 2022 Sierra, pickups equipped with the turbocharged 2.7L I4 L3B gasoline engine were rated at 310 horsepower at 5,600 rpm and 348 pound-feet of torque at 1,500 rpm. Although peak torque is up on the refreshed models, peak horsepower figures will remain at 310 horsepower – the same figure as on the pre-refresh Sierra models.
The torque gains are the result of a more rigid cylinder block casting and a 30-percent-stiffer crankshaft. The boosted four maintains its fully forged bottom end.
Standard on the Sierra Pro (base model), SLE and Elevation models, the high-output turbocharged 2.7L I4 L3B gasoline engine in the refreshed 2022 Sierra replaces the naturally aspirated 4.3L V6 LV3 gasoline engine and the naturally aspirated 5.3L V8 L82 gasoline engine offered prior to the model refresh. Other engine options for the refreshed 2022 Sierra include the naturally aspirated 5.3L V8 L84 gasoline engine and naturally aspirated 6.2L V8 L87 gasoline engine, as well as the 3.0L I6 LM2 turbodiesel Duramax.
In addition to more torque from the turbo L3B, the updated 2022 Sierra also offers new exterior styling, an overhauled interior, and fresh tech like the GM Super Cruise semi-autonomous system. Under the skin, the 2022 Sierra once again rides on the GM T1 platform. Production takes place at the GM Fort Wayne plant in Indiana and the GM Silao plant in Mexico.
It’s also worth noting that – as GM Authority was the very first to report – the updated L3B engine in the Sierra’s corporate platform mate, the 2022 Silverado 1500, will also be rated at 430 pound-feet of torque.