If you’ve been hearing a chirping, screeching or squealing sound coming from the engine bay of your 2nd generation (2015, 2016, 2017, 2018, 2019 and probably also the updated 2020 model year) GM Chevy Colorado truck, you probably need to change the OEM serpentine accessory belt on the LFX or LGZ 3.6L V6 engine. 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 Chevrolet Colorado Serpentine Accessory Belt Replacement Guide
The procedure should the same or very similar for the Ecotec 2.5L turbocharged I4 engine or the Duramax 2.8L turbodiesel I4 engine.
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.