The Bonneville is a 2005 SE with V-6 has any one else experienced this same noise, / issue and would share their experience and tips .. please?
Here is what happened with my Bonneville:

A sudden new noise heard from under the hood of my car this past Friday!
I have determined The noise is ...

Here is an update. I paid $$$$ and had the converter replaced. The Converter code is gone now. Back is the sporadic and evasive EVAP code ! rrrrg!

Yes this is the problem I am experiencing. This info will help tremendously, thank you very much for this link!

Success! and it is because of Your help that lead me to the source of the problem! Here is how it all went. The entire process took about 15 mins. from the time I discovered the problem area and decided on a plan of action and performed the actual repair.
After locating the cruise control motor ...

Yes this helps tremendously!.. Thank you so much!
Now I have to discover why and what is causing my car to throw a sporadic EVAP code, even though neither I or the mechanic can find any leaks or defective parts! still because of this EVAP code. I am unable to get the car to pass the NC DOT ...

Thanks for the tip! I will look into this in the morning!

My 2005 Bonneville SE with 3.8 V6, normally aspirated, series two motor. with 175,000 miles.
All of a sudden the cruise control stopped working! ? I checked the fuse, and it is good. What else shall I check? where could the problem be?

I just had ( with in the past 5 days) the converter replaced ...

Thanks MW!

MW, would you be able to tell me where the MAP sensor and the purge solenoid is, The PCV, and what the round cylinder is that is on front of the intake plenum , and close to the engine oil fill neck, and has vacuum lines going to it ( i think 3 lines.)? on my SE with 3.8L V6 with no ...

I would like to jump in on this discussion as I am facing converter issues for the first time with my 2005 SE with 3.8 L and is 100% stock, and with single exhaust.
the car has 178,000 miles on it and is driven 650 miles a week.
the car will not pass inspection at the moment because of the ...

Oh, so I own the base model, good to know.
Ok. I was hoping to learn so that when I open the hood, I would know what I'm looking at, as I know the other items. It is these electronic pollution control items like MAP, and temp sensors. etc.

Ill post only the codes then. and hope that replies come ...

Thanks !
Here is an update.
the tranny is shifting beautifully with the Lucas fluid in it! WOW! THAT IS SUPER! Plus the tranny code has disappeared! Once again thank you MW!!

Out if frustration, I finally caved in and took the car to a mechanic. he pulled two codes.
One is the evap system, gross ...

Can anyone share a link to where I can see what the name is and the location of, all the electronic and pollution control 'things' under the hood and on this engine are located?
I have a 05 Bonneville with 3.8 and no super charger and it is just a Bonneville. no other special designation.

Thanks MW.
Half a bottle of Lucas is in my tranny now. and ill see tonight if the shifts have improved.
Now An update: I crawled under the car and attempted to locate any vacuum leaks in rubber hoses and the canister. I used starting fluid and sprayed every connection and hose. and i noted NO ...

Thanks mrwildroot, I will also try the Lucas Transmission conditioner. by chance can you tell me how much of this fluid you added to the tranny?

Yes, much appreciated ! I made a copy of that test procedure also.

An update on my Bonneville:
The check engine light came back on tonight. I will discover Tuesday evening what code it has set, and inform you also of same.

That was very good info every one. Thanks!

SO here is a update: for Sat. 4-27-2013
The CEL has remained off since the past Thursday.
The car drives excellent. gas mileage is 28 mpg on the hwy.
On sat. I removed the gas cap and filled the tank with fuel, and installed a new gas cap.
Engine idols ...

Excellent ideas every one , thank you all. I have answers below and some new questions for you, watch for the question marks and i don't know smilies.

The fluid does not smell burnt and is still red, not brown. Fluid level it is up to the full mark.

Interesting that one of you mentioned that ...

My 3.8 non super charged engine has set the following codes that have me baffled on how to find the problem and correct them:

1) Coolant temp. below regulating temp.

2) evap emissions Gross leak. ( I have applied black silicone to the gas cap, and drove for 170 miles, and I still have this code ...

I forgot to ask this: The buttons on my radio have some kind of 'blacking' on them and I think the plastic is actually red and thus the reason why I see the controls to be labeled in Red. Yours is perhaps the same way.... Any how, on mine, some of that black is now gone and there is too much red ...

This is super! what a very helpful posting! thank you!
I would like to ask ... were you able to verify if the 2174 bulbs from radio shack will work or not?.. so that all the bulbs can be purchased at radio shack or not?
thank you!