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Message: <blockquote data-quote="YukonDenali03" data-source="post: 29858" data-attributes="member: 14296">I'm a retired Software Design Engineer that has also owned a 2003 Yukon Denali since new. After rebuilding the engine last year because of a low oil pressure problem caused by a Cam bearing failure, playing around with the truck has become my new hobby.Eventually I became interested in what you can do via the OBD port. So, I decided to write an app the explore that as a little programing project to keep myself busy.I have managed to create a little app that I think other might find useful. 1. It can scan and clear DTC's. I know this isn't new, but it can scan ALL the modules on the class 2 bus in under 5 seconds.  My Launch tablet take close to 2 minutes.2. It can issue commands to various modules on the Class 2 bus.     a. It can sweep the cluster gauges to see if any of the stepper motors are bad.     b. It can cause the front and rear HVAC modules to rerun the calibration procedures. That might help with actuator problems.    c. It can controls the windows and locks, because why not.    d. It does other stuff too.Based on feedback, lots of other can probably be added. Give it a try and let me know.The application runs on Windows and use ELM327 devices to connect to the OBD port. I have used and OBDLINK SX connected USB and an OBDLINK MX+ over Bluetooth. I make no promises about cheap Chinese knockoffs.The UI is pretty simple and hopefully self-explanatory.It should go without saying that this is a Windows executable file. I have signed the file, but Windows is going to give you a scary warning about an unknown file. I would fully encourage to you to scan it with your malware detector of choice. <a href="https://drive.google.com/drive/folders/1eH_bWf_EB6xwG97PlfSCi28GtJ_EM13h?usp=drive_link" target="_blank">gmt800app</a>[URL unfurl="true"]https://drive.google.com/drive/folders/1eH_bWf_EB6xwG97PlfSCi28GtJ_EM13h?usp=drive_link[/URL]Send feedback to <a href="mailto:gmt800.owner@gmail.com">gmt800.owner@gmail.com</a>[ATTACH=full]6423[/ATTACH][ATTACH=full]6424[/ATTACH]</blockquote>