Knocking sound

[mack1a]

I like the car also.

But I will not excuse a service organization and technical support org that won't even believe the problem exists. The excuse that you can't reproduce a problem does not preclude fixing it.

Many computer and automotive problems are intermittent in nature and you have to do some logical thinking as to what the problem source could be and take action.

This problem isn't even intermittent. I can reproduce the faliure any morning where the temp is low enough. The conditions of failure are quite definable and it isn't all that tough to do.

No excuses, these people just don't want to get involved. As great as the car is, there are some design people on this vehicle that haven't a clue.

[rjm]

Quick update:

Mine has become more intermittent now that the weather has warmed, but its still there. Many times now, it occurs immediately after turning the car off after a short trip. My parents where in the car with me recently, and my mother thought someone was banging on the side of the car (had pulled into Sam's Club parking lot).

As an aside, I'm also having an intermittent problem with the front door locks. I have the doors set to lock when shifting out of park and unlock upon shifting into park. But periodically, the front doors won't lock using any method, yet the rears function properly. On the reverse, several times, the only way to get the fronts to unlock, is use the key, or once I had to open the rear door and reach in and pull up the front lock.

[Superjim]

Originally Posted by cubldr

It is also apparent that this knocking sound is somewhat endemic to the 06 DTS. Mine certainly does it. In fact, does ANYONE have one that DOESN"T do it?"

I am on my 2nd '06 DTS Performance Sedan. The first one burned in my garage fire.

Neither one of them has the knocking sound you guys are talking about. And I am very glad thay don't.

I would be at the dealer at LEAST once a week. Or more.

The first one had almost 20,000 miles on it and this one now has 8,000 miles.

[mack1a]

I do know the problem is temperature sensitive as far as mine is concerned. I probably won't hear mine until we go to upper Michigan in a couple of months.

It will then fail next winter when we have "cold snaps" down here in FL. I would expect that a group of 2006 DTSs would sound like a percussion section up north when it really gets cold.

[mack1a]

By the way, sorry to hear about the fire. Hope all is well now, also hope the DTS didn't cause it.

[Superjim]

Originally Posted by mack1a

By the way, sorry to hear about the fire. Hope all is well now, also hope the DTS didn't cause it.

Thanks for the kind words. Nope, The DTS didn't cause it.
The fire started from a wall plug that didn't even have anything plugged into it. The wall plug shorted out. Burned the garage and utility room and the '06 DTS that I was really fond of.

Bought another '06 DTS. A new one. Same color. White Lightning.

For some strange reason it doesn't ride and drive like the first one. I like it but not as well as the first one.

Jim From Texas

[z06bigbird]

Maybe it is Jimmy Hoffa!! Geraldo thinks he is still alive.

[mack1a]

Originally Posted by Superjim

Thanks for the kind words. Nope, The DTS didn't cause it.

For some strange reason it doesn't ride and drive like the first one. I like it but not as well as the first one.

Jim From Texas

That's strange. I can see something like front end alignment making a difference in how it drives. Out of curiosity, does it have the same tire type?

[Superjim]

Originally Posted by mack1a

That's strange. I can see something like front end alignment making a difference in how it drives. Out of curiosity, does it have the same tire type?

Yep, same exact tires. Air pressure is the same. 35 front 32 rear. Really same everything. Both are Performance Sedans. Even same color. White Lightning.

I even went to the dealer and had them print me off the build sheets for both cars so I could compare them side by side. There is THAT much difference in the two cars. I figured something was different about the suspension options. Obviously there is a big difference, or I would not have gone to all that trouble.

They check out (on paper) to be exactly the same. The only differences are the first one had the retractable sunshade for the rear window and no NAV and this one has NAV and no sunshade.

The new one sits higher from the ground then the first one. The first one had more of a hunkered down look. The fender wells were closer to the wheels. That was probably why it rode rough but handled like it was on rails.

The Service Manager worked with the new one for about two hours one day with a Tech 2 and finally got it to lower about an inch all the way around. That helped quite a bit. Made it handle a little better but increased the ride harshness a little also. I will put up with a little stiff ride as long as it handles better.

The first one was more like a BIG 4 door Corvette. Handling on it was awesome but it did ride rough. More than once, someone has remarked, "This car don't ride like a Cadillac." This one rides more like a Cadillac should but doesn't handle like the first one.

I can't explain the HUGE difference in the two identical cars, and (so far) neither can anyone else. I thought when I bought the first one... "Man, this is great. Cadillac got it RIGHT. People will LOVE these cars." Now I am thinking that the first one was an aberation and that THIS one is normal. This one is OK, but the first one was, as Tony The Tiger would say, GREAT.

All thoughts and ideas are welcome.

Jim from Texas

[The Tony Show]

I'd bet it's the tires. The quality of the Continentals were wildly inconsistent, with some riding great and other coming in with all 4 out of round, hence Cadillac's decision to change back to Michelins in the mid-year of 2007.