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

 

I'd start on YouTube searching and poking around. Dealership sometimes just want to swap expensive modules when it might be just bad wiring. Follow the wiring along and look for places it might be rubbing or for bad grounds.

 

when you get a trouble code, it usually helps to look at the freeze frame data that comes with it.
For example the system voltage.

"Memory check sum error" that's a bad sign.
I have the exact same van as you and the TCM failed completely at 50k

 

These are helpful videos, thank you. I replaced the ground like in the first video but that did not work. I will see if I can find a wire rubbing somewhere like in the second video. I've looked a couple of times but will keep searching!

I did just this and now have:

• 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

 

that's not freeze frame data.

https://www.obd-codes.com/p0601

 

so we have 3500 cargo van, the gauges fluctuates up and down and then boom stranding disables. There is a tick tick sound when the gauge fluctuates. What could be the problem if anyone knows or if hit happened to them?

 

@Mur
You should probably post your own separate question instead of hijacking this fella's topic. Post all your details too: year, engine, miles, trouble codes, etc. I don't know which gauge you're talking about or where ticking is coming from. Please start your own topic and maybe even a video. Thanks.