The PID Scanner function of TorqueScan will compile a list of all available extended PIDs on your vehicle including those not in the pre-defined list.Note: I use TorquePro with TorqueScan. Be sure your device is plugged into a charger. The PID scanner says it will take a long time. That's useful enough, but if you want some real magic goto Menu-PID Scanner to scan for additional PIDs while you're on a longer drive. Very Useful FREE Torque plugin.After you install this goto Menu-settings-plugins and tick the 'Allow plugins full access check box' TorqueScan will show all the known sensors that it can read from the installed list of PIDs along with the realtime data being read. You just added all Pre-Defined GM PIDs to the available PID list. 'Menu-Add predefined set-Pontiac/GM/Opel/Vauxall'. From the main screen press Menu-Settings-Manage extra PIDs/Sensors. Capable of using free and paid plugins and several other features not in the LITE version.You should enable extended GM PIDs. It'll be easier to answer your questions.And please let us know if and how your repairs were successful. GM Parts Books, GM Schematics, GM service manuals, and GM training materials.Please include at least the year and model in your threads. If I could afford a real Vertronix or HP Tech II I don't feel confident that I could weed out the Chinese counterfeits. Most of us can't afford a real Tech II and those are getting scarce. If you can find a working Tech I or a real Tech II they have more functionality than any aftermarket solution depending on your needs.The Tech I is all but extinct (I haven't seen one for sale in over 2 years). It varied greatly by model, nameplate, year, and even engine choice.Mr Goodwrench used the Tech I and later the Tech II to communicate with these vehicles. It was not standardized even loosely within GM divisions. Or at least a whack at it.It's a proprietary GM PWM TTL level Serial communications protocol. 1982-1995 GM ALDLPC hardware and software for diagnostic code reading and real-time data logging on the cheap.
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