Vantastic

Thank you Jsdirt for taking the time to write up that thoughtful response. I have been working on going through all of your suggestions but would like to update that I was able to use a friend's scanner the next time it died on me and I am seeing these error codes under the ECM Data Stream: Reduced Engine Power History: Throttle Actuator Control (TAC) DTC PO601-00: Control Module Read Only Memory (ROM) Last Test: Failed/Current This Ignition: Passed & Failed Since Clear: Passed & Failed I have been checking for bad connections somewhere as you suggested and haven't found anything yet. Also cleaned up grounds, looked for problem areas around metal/heat sources, ect. I will keep searching and probably grab a diagram from alldata.com as recommended. Thank you again for your assistance

2013 GMC Savanna 1500 AWD 125,000 miles Last year: Last year my van broke down and wouldn't start, throwing a "Starting Disabled, Service Throttle" error on the dash. When I removed the negative battery from the cable from the battery and reconnected it I was able to start it and get to a autoparts store. I installed a new TPS (throttle position) sensor and haven't had any issues sense until recently. Shortly after I replaced the battery Last week: Van died in a customers driveway with the error code "Starting Disabled, Service Throttle/Service Stabiltrak". It also threw a check engine code, "P0601 Generic: Internal control module. Memory check sum error." I waited two minutes, van fires right up and I drove it another week. I cleared the check engine light after noting which one it was to see if it would come back, it never did Today: Van dies on the highway with ALL the error codes this time, "Starting Disabled, Service Throttle/Service Stabiltrak/Service Battery Charging System". The 'service battery charging system' is new I hadn't had that one before. No check engine light. The van would not start until I disconnected and reconnected the negative battery cable from the battery. I checked what I could based off research on Google: Checked battery, it is only 6 months old and is at 12.97 volts Checked voltage with the van running to check alternator: 14.8volts Checked battery terminals for corrosion(none) Battery cables firmly attached Belts to alternator seem to be in good condition and run smoothly Starter sounds good, fires engine up right away No strange engine noises or rumbling sounds Van's electrical system still work (lights, radio, dash) I just started an HVAC company and this is my work van, its gonna be rough on the new business if I need to take it to a dealership. However I will if I must