If the air conditioning system in your second generation (2015, 2016, 2017, 2018, 2019 and probably also the refreshed 2020 model year) GM Chevy Colorado truck hasn’t been working well recently, you may need to clean or replace the cabin air filter element located in the HVAC blower motor housing. Check out my DIY tutorial for the procedure (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below.
2015-2019 GM Chevy Colorado A/C Cabin 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.