The recall was performed prior to the second instance of the mentioned faults and before the first mentioned fault. In particuluar, the car has 34k miles with 22k of those being on gas. I thought the engine shaking a bit was relatively normal. It usually only does it at start-up and ocassionally during mountain mode. At other times, it almost as quiet as electric.I suspect the recall caused all the error codes, as it did on mine and others. I would take it back to the Dealership that did the recall and ask them to do a courtesy reflash of the becm and the hpcm2. Voltec techs are aware of the conflicts the recalls are causing. As far as the engine shaking, it may be time for a tuneup if you have quite a few miles on the gas generator. Weird about the only in mountain mode setting, have not heard that one until now.
The bypass plug is not going to help if the wiring harness is the problem. The 2011 and 2012 were retrofitted by the dealerships for the coolant level sensor by splicing into the existing wiring harness. Often the splices were done incorrectly and corrode. These splices need to be checked and/or redone. That's the only idea I have for you.I've been fighting this issue for 4+ years!! I have a few more data points but still cant seem to track down the root cause.
2011 200K+ miles
I have the coolant bypass plug (yes my coolant is full), I have had the HPCM2 re-flashed twice (once before and after the bypass plug)
The issue is much worse when its hot outside and I have to run the AC, It will tend to trip more often when the ICE has to run as well (I had a very long commute to work 100+ miles each way) So far I can clear the codes and it will stay away for a bit (my last stretch was 8 months) but most of that time I was only driving on the battery (covid and started to work from home before that)
I don't want to have to get rid of her but at this point i'm a little sick of dealing with this. an other ideas would be helpful
Hi,Just got mine fixed and reprogrammed with the VCX. Thanks to all who have done this before for the guidance. This was the first real issue I have had with my car in over 100k miles, and I was about to take it to the dealer (which I never do for any of my vehicles), but with the info here I was able to fix it myself and for less $. Even if the VCX is something you use for the SHVCS alone it pays for itself.
The CD that came with my VCX doesn't have the VM for GDS2 so I wasn't able to get that working (don't need it for programming, but I would like to have for diagnostics). Trying to get that to work was the most time consuming part, but once I gave up on that it went pretty quickly. Tech2Win may also be helpful in the future for my older vehicles. I have a Tech2, but if I need to program anything it may be possible with the VCX.
I did run everything fine on my 64 bit Windows 10 machine (Surface Pro 3). With the 32 bit Java as recommended previously I didn't have any issues.
If you read back a couple pages there is a step by step process to use the VCX Nano and ACDelco TDS subscription. It is $40 for 2 years for one VIN.Hi,
What subscription did you pay for to do the SPS programming?
Or did you manage to find a Global TIS application and get that to work?
Yeah, I think that subscription is gone now unfortunately. Looks like 2 hours for €35 now - annoying if it does not fix the issue!If you read back a couple pages there is a step by step process to use the VCX Nano and ACDelco TDS subscription. It is $40 for 2 years for one VIN.