Just wanted to update you with today's events.
I drove the car with the GM Field Engineer Dan and the GM Operations Manager.
They let me take the car for 32 miles on the open highways -- on my usual routes for my business -- and guess what!!! THEY HEARD IT! They both looked around as I drove and acknowledged they felt the car suffering as if 'going up a mountain' and said it was internal and that whatever was causing those sounds was 'out of acceptable category'.
The Engineer had the car hooked up to some computer and at one point, whatever he did, he asked if I heard anything now and I indicated no! But I noticed that the rpms on the car were up. When he turned off that button on the computer, he even said 'now you hear the noise again' and I agreed.
THIS WAS THE SAME GUY that the other dealership took for a ride and he heard nothing with them! Wonder how they drove it for those simple 6 miles they took the car according to the report.
Then I asked him to drive the car back -- and he agreed!
While he was driving with me, he was listening and trying to determine where the sounds were being generated from. His face looked puzzled but determined. At one point, I asked him if his foot was vibrating, and he said the floorboard definitely was.
When we came out of the car, he looked around the car, told me he 'heard the noise' and the operations manager agreed -- and promised 'I am going to go back and try to find out what it is'.
When we came back to the new dealership, the Engineer took another vehicle out and we drove and all admitted that despite a 2009 with 5.3 liter -- no noise! The Engineer investigated and found that this vehicle had no AFM!
The Operations Manager said they would 'go back to the drawing board and see what can be done' to make my car just like the other car. The Engineer also informed me that so much time and effort could be costly to GM if the car cannot be fixed -- and when I inquired about a replacement car, the Operations Mgr said that GM would make that decision down the road. They just told me to sit tight and they would investigate and then contact me as this is a 'puzzler'.
What do you think!
I did what you said -- I was not overbearing, polite but firm and persistent. I hope you don't mind but I used your line: "I know you don't build the car -- but it's in your best interest to fix the car!"
This dealership also was pleasant and cooperative and indicated I could bring the vehicle here for whatever GM recommended!
Turns out -- my brother (another die heart GM guy like me) buys all his trucks and services them from this dealership. They treated me really nice.
The 2 GM guys were really nice too!
So what about that computer? What did he do to get rid of the noise? Is it a calibration or did he override the AFM? As a mechanic, do you know if the Engineer can download from the car without AFM and calibrate into my car?
Anyway, so far I am glad I listened to you and not buy any devices or go to any outside sources. I am glad these 2 GM specialist heard the sounds and agreed it needed to be addressed.
GM customer service later called me and confirmed that the 2 GM reps admitted they 'heard the noise' and that the 'Engineer is going to investigate' as to what can be done to 'make the car more comfortable.'
Do you want to know the final outcome? or do you want me to let you go know! You have been such a big help. Wish you were here.
Let me know!