2000 Cadillac DeVille DHS from North America - Comments

The engine knocks and pings, even though I am using premium gas, and the dealership cannot find a way to improve it. The last time I was at the dealership, they gave me a copy of the owner's manual page that states that knocking and pinging is expected in this car!!!

I am having to add a quart of oil every 1000 miles, and I think that is way too much! The dealership has done an oil consumption test, but can't find any problem.

The rear stabilizer makes too much noise, and seems to start and stop at unexplained intervals. The dealership has told me this is within normal levels.

I love the seat back heaters in both the front and back of the car. That is my favorite feature.

I enjoy the roominess of the interior.

This car is fantastic. I find it extremely hard to believe that a dealership would show you an owners manual that would have any flaw admitted about a car written in it. If your car has any problems then maybe the main problem is the owner of the cars consistent maintenance or lack there of, to the vehicle. Like a parent and a child, the child cannot be blamed for their character flaws resulting from a poor up-bringing.

Give the guy some credit. He is checking/changing his oil often enough to monitor the consumption, and he's trying to get the dealer to fix every one of his problems, so how is that a lack of maintenance?! Besides, 22750 miles is way too soon to be seeing the problems that he is having, regardless of the kind of care he gives it.

And finally, anybody who paid that much for a car deserves a trouble-free ownership experience. He shouldn't even need to know how the hood opens.

Have your dealer De-carbon your engine for you oil consumption and replace the egr valve which is part of the consumption fix and the pinging will most likeley disappear and by the way, the high octane fuel caused your carbon build-up which caused the pinging and oil consumption. Get the oil consumption/de-carbon procedure, then switch to a lower octane fuel. The Northstar is a race engine, drive it like one once in a while and the combustion chambers will stay clean.

I believe I can give some advice to help those of you having trouble with knocking/carbon buildup since I have been through this problem. I think one of the major problems people are having with carbon build up is that when GM came out with this version of the Northstar, they advertised it to run on regular gas. Supposedly, they had mofified the engine to allow this. The truth is that it is a 10:1 compression ratio engine and the manual says to use gas with 90 octane rating. I don't know about your location, but where I live, the choices are 87 for regular,89 for plus and 93 for premium. Therefore, only the premium gas meets the GM specs for octane. Nevertheless, I tried running on regular and it wasn't long after delivery that I had knocking problems. I took it to the dealer and they put fuel injector cleaner in the cylinders and let it soak for several hours and then removed the cleaner. This is apparently the recommended GM fix for this problem which evidently occurs frequently. That took care of the problem knocking. However, I found that if I continued to use regular gas, the problem would return. Happily, I found a solution to the problem. First, use premium gas all the time no matter what Cadillac says (I know. It is a lot more expensive). In addition, every 2000-3000 miles, get some Chevron Techron fuel additive. You can get at chevron stations or better yet, it goes for a little over 5 bucks at Walmart. You add it to an empty fuel tank and pump in about 8 to 10 gallons of gasoline. Drive the car and do not add more gas until the tank is almost empty. Since I have been doing this, I have had no more problems with knocking which is caused by carbon buildup on the pistons and valves. Also, in addition to knocking and pinging, the carbon buildup can cause oil usage because the carbon interferes with the action of the rings which are supposed to deposit a thin layer of oil to the cylinder walls during upstroke and wipe it back down to the oil reservoir during the downstroke. Try this and see if it doesn't largely solve your problems.

Ron.

Read your comments on 2000 cadillac about motor pinging;

even with premium fuel?. I thought cadillac changed to regulAR FUEL IN 2000. SOMR PEOPLE THINK BURNING PREMIUM

FUEL IS DOING THE CAR A FAVOR;BUT NOT IF CAR IS DESIGNED FOR REGULAR FUEL.

KEN.

We have a 2000 Cadillac De-ville with about 70,000 miles and have owned it for approximately 16 mos. The dealership now tells me the torque converter needs to be replaced. No problems, just the check engine light came on. Had the transmission serviced and fluid changed.

Also it is burning oil like seen in other cars this same type. The oil change place has articles in their newsletters about this, but the dealership doesn't know anything about it. I have to add oil about every 500 miles, last week it did much better.

Mainly concerned about torque converter replacement. That's very big money. Any suggestions would be greatly appreciated.

My 2000 DHS burns oil as well. What causes this? It has 41,000 miles.

My boyfriend and I just purchased a 2000 Cadillac DHS, and are now having a few problems with it. When we purchased it, we did not hear any knocking or other problems, but now the air conditioning makes a knocking noise when turned on for about 3 minutes, then stops and starts back up for another 3 minutes.

The CD player only works when it wants to, and when the car is turned off the driver seat goes to what ever seat setting it wants to, either my setting (driver 1), my boyfriend's setting (driver 2), or just any random position it wants to.

But other than that, I love the heated massage seats in the front and rear, and the car came equipped with automatic screens on the rear and back window.

I love the sun roof, and like that I only see few Cadillac DHSs on the road. I always see DTSs and Devilles, but nothing like ours.