Need help, the "key stuck no gas gauge" problem

[the cadillac kid]

Are any of your sensors bad that you know of? A bad sensor or gauge reading could, after some time, cause confusion and blow other fuses and screw with a wide variety of things; ie: your gauges going out

[fastforward]

ewill3rd ..... How can I find my ECM and is it the same thing as a pcm?

Dealer says the reason for my throttle problem(car jerking and going into reduce power mode) is because my ecm is fried...Do you think that is the case? my car also locked up last month and I couldn't pull the key out, a mechanic by passed the system and now the gas and all other gauges dont work...

[ewill3rd]

The PCM and ECM are essentially the same thing.
The real difference is the PCM does engine and transmission but the ECM is only engine.
The CTS uses an ECM and a TCM (transmission control module).
While the terminology is generally interchangeable there is a technical difference.

Don't bypass systems that are intended for your safety. Whoever did that should be chastised in my personal opinion.
It sounds like an ECM problem though, odd that your gages don't work now.
You need a knowledgeable tech looking at that car, one that won't bypass safety systems and tell you the car is fixed.

On '03 CTS the ECM is bolted to the engine on a bracket over the right side valve cover if memory serves.
On the 3.6 liter in newer cars it is bolted to the front of the engine on the right bank cylinder head.

[allday]

Thanks for you help!

[Nerryon]

I had a similar problem with my 04 cts. The thing is if you remove the battery polls for two long it won't reset the system. it has to be a short period of time, at least 5 to 15 min max. that was with my windows locking up. when all the other radio display and windows failed to work, the problem turned out to be the Body control module under the glove compartment, And when my gas gauge and all the problems you list went bad it was my Main engine computer.

hope that was helpful