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Awesome, I'll give it a try. As always, I appreciate your help, thanks!

Cool, I'll give it a try. So worst case I change the VIN to the random corvette one and it still tells me that it doesn't match, and then I can change it back to the original camaro one again and I'm...

The thing is the current heads/cam tune already has substantial work done to it that the customer doesn't want to loose.

I've looked up the OS ID 9355159, and it comes up as an OS for a 98...

Any idea what year/model the VCM OS ID 9355159 corresponds with? For some reason its not showing up on the GM service and parts lookup page....

If its, say an 01 corvette I could just look up a...

So how do I go about flashing in a right file for the OS if it won't let me write, do I have to do that at the dealer or any way I can do that?

I see, any idea how this could be? Does it mean someone had to flash a different OS on it - (maybe the guy with EFI live?)

Can this be changed by changing the VIN to reflect the current OS - this...

Its supposed to be an ls1+pcm out of a 98 camaro v8, is the OS not matching the vin in the PCM? The VIN is out of a 99 Camaro v8 so is it the OS wrong? This guy says someone with EFI live worked on...

Im trying to tune a 69 camaro ls1 swap with a 98 ls1 camaro pcm. Reading/Scanning goes fine but I get an error trying to write " invalid vin/os pair problem" VCM flashing disabled.

Here's the...

You were right about the jumper cables. We took everything off and hooked the battery charger up for about half an hour, then retried "write calibration only" and it finally went through ok. Tune...

originally did a write calibration and it failed so I tried write entire which also failed and consequently the car wouldn't start or connect to scanner. Now, write entire gets some effect but is...

Only write entire seems to be getting any effect. After numerous fails - error 8a it eventually comes to write the VCM but towards the end cycles between

retry: beginning high speed mode
retry:...

Im really stuck on this guys, I'm at the guys house and nothing seems to be working to write the VCM and/or start the car

latest 2.22

It was stuck between retrying to write for about half an hour. I aborted since it wasnt going anywhere and now it's showing code 8a again at step 5 writing entire VCM - failed .

I...

Now I got it to write after hooking up jump start cables, the battery could've been to low. However at the very last step of the write it keeps switching between

Retry: Disabling normal...

Same problem, jumping between retry modes. 07 colorado. Anyone know what to do?

While writing the VCM at the finalizing step the gauge all the sudden started beeping low fuel/traction control and VCM write couldn't be completed stuck at the last step of "begining low...

I have a 2003 suburban I installed the hydroboost brake system on and now I get a SERVICE BRAKE BOOSTER in the message center (not dtc/ses) due to the lack of a vacuum reading since the new system...

I have HP tuners with the HPt usb cable and interface for my Camaro. I also have 2 other fords as family cars and would like to read/clear their codes - I know HP tuners doesn't support it but can I...