How to replace ECM/ECU??

Chevy HHR Key Fob Program - 7 Easy Steps Must Know

2010 Chevrolet HHR Replacement Key Fobs From Keyless Entry Remote Inc - Shop and Order Online

2006 hhr, please e-mail me how to re-program my remote control fob. thank you,john benson

HP Tuners GM Gen 4 Training Part 6: ECM Logic Operation

Ryan Martin on Instagram: "The new E41 ECM Upgrade Kit from @hptuners gives DIY enthusiasts and professional tuners a convenient option to perform the ECM upgrade on their 2017+ Chevy Silverado/GMC Sierra 6.6L Duramax in their own garage/shop. The best part? There’s no need to remove the ECM from the truck. This means there’s no risk of breaking tabs during the removal or reinstallation process. This kit also doesn’t require any reprogramming or relearns."