Nomarchy

Here is his latest update e-mail:

I have been having problems with CEL repeatedly (the car has been in EIGHT different times in the last 2.5 months). They've already done:

POWERTRAIN CONTROL MODULE ENGINE REPROGRAMMING WITH SPS

and

THROTTLE BODY ASSEMBLY REPLACEMENT

and replaced various sensors.

I was told that they were running all sorts of diagnostics in anticipation of (and perhaps to prevent?) changing the supercharger on my car.

Apparently, at some point, a GM "World Class Technician" was involved. In addition, the "shop foreman" was on 'the job' today, as well as the technician who has been working on it regularly.

Any guidance you can give me, supporting thoughts :-) etc. would be appreciated.

Btw, totally and completely stock.

chevysssc

iTrader: (2)

i dunno

Raven SS

there replacing the ebcm..it says it in the first sentence what do u need help with?

Nomarchy

Does this sound right to you, though?

Nomarchy

Is the "electronic brake control module" the "main brain (computer) in the vehicle?

SSdan

Nope, the PCM is.

Coblasts

Powertrain Control Module Function
The powertrain control module (PCM) constantly looks at the information from various sensors and other inputs and controls systems that affect vehicle performance and emissions. The PCM also performs diagnostic tests on various parts of the system. The PCM can recognize operational problems and alert the driver via the malfunction indicator lamp (MIL). When the PCM detects a malfunction, the PCM stores a diagnostic trouble code (DTC). The problem area is identified by the particular DTC that is set. The control module supplies a buffered voltage to various sensors and switches. The input and output devices in the PCM include analog-to-digital converters, signal buffers, counters, and output drivers. The output drivers are electronic switches that complete a ground or voltage circuit when turned on. Most PCM controlled components are operated via output drivers. The PCM monitors these driver circuits for proper operation and, in most cases, can set a DTC corresponding to the controlled device if a problem is detected.

Nomarchy

Thanks, that's what I thought. It doesn't exactly boost my confidence when the service advisor himself writes that the EBCM is the "brain" of the vehicle.

I was told on Saturday that they had replaced the item and that the car was running smoothly, no codes, etc. They asked me if I was ok with them keeping the car another day to test drive it further. I agreed.

They didn't contact me at all over Sunday (I have a loaner, so they probably think it's alright and I don't mind not having my car. I do).

I still haven't heard from them.

Thank you. This makes a LOT more sense than the Service Advisor's nonsense.