The service interval specification in the owner’s manual for the engine air filter element in the LFX or LGZ 3.6L V6 engine in a 2nd generation (2015, 2016, 2017, 2018 & 2019) GM Chevrolet Colorado truck is every 45,000 miles (or 72,000 KM). Check out my DIY tutorial for checking, cleaning or changing the engine air filter (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below.
2015-2019 GM Chevrolet Colorado Engine Air Filter Replacement Guide
Owners of the similar GMC Canyon, Chevrolet S10 (Argentina & Brazil / Brasil), Holden Colorado (Australia) and the related Isuzu D-Max may also find the DIY instructions to be helpful. The procedure should be the same or similar for the Ecotec LCV 2.5L I4 engine and Duramax turbodiesel 2.8L I4 engine.