just wondering if you ever figured out what the problem was. I have a 09 Escalade hybrid and having the same issues. Already replaced hybrid battery and that was not the fix any info would be helpful

 

I got the original problem taken care of. Put a re-cond hybrid battery in from green bean. Drove great about a month, then same problem came back. Green bean warranties the battery and installed another one, and the problem didn’t return. It did however, a few weeks later, start misfiring like a **** and shut down. Replaced plugs wires and all 8 coils. Ran beautifully for a few weeks then oil pressure started dropping and putting me into limp mode, so at that point I just got rid of the vehicle. Haven’t had a headache or cussed and hit my vehicle since! Haha

 

Awh, the life of a GM TwoMode owner. Most Dealership service departments have never even seen one of these and to do a proper diagnosis and repair their technician would have to take the time to do a deep dive into the GM Hybrid data. Tell you right now the service manager is probably not going to allow for that.
The way that I see this situation is that twomode owners have 4 choices.
1. Find a dealership service department that sees the twomode vehicles on a regular basis and has a skilled Hybrid tech. (No luck for me after 2 years of searching)
2. Find an independent Hybrid repair shop that has the knowledge to do a proper diagnosis and repair. (No luck for me after 2 years of searching)
3. Do all your own research and work with a local regular shop that has a skilled tech that is willing to accept a challenge (this is how I got the ABS system repaired recently)
4. Do a zsabin425 and get rid of it ASAP (man this ABS system issue almost made me do a 4 LMFAO)