The new Cadillac chassis is very sensitive to certain frequencies and harmonics. Have your dealer or a tire shop with a balance machine that can check "road force" balance and match mount your tires. As for oil consumption there are 2 fixes: One is an extensive de-carbon process to free sticking rings and the other is to replace the rings. Use the lowest octane gas you can without engine ping and don't be afraid to get into the throttle occasionally. Slow acceleration mixed with high octane fuel = excessive carbon. High octane fuel burns much slower than low octane. (to resist detonation). I am a very experienced Cadillac technician and have solved these problems a lot. There are a lot of clueless mechanics out there, I see them come and go. Hope you get a good tech., tell your dealer there are technical service bulletins, and or preliminary info. on all your complaints. Check the ground at the alternator for various electrical problems I would love to own an STS, but for now the Cadillacs pay for my Accord. Best of luck, don't give up. Find a good dedicated technician.
I have just purchased a 2002 Seville SLS, with only 20,200 miles, but before buying performed a test run around town and more importantly on the Highway. Yes, it started to vibrate at between 60-70 mph. The fix however is simple, upgrade the tires from the OEM Goodyear Integrity tires and replace with a Michelin Pilot, XGT H4. It was a completely different riding vehicle. Smooth thoughout the legal speed range and more.
And for those of you who ever have need to change a water pump, before going to a service center and being charged $350 plus for the privilege, consider this, you can buy the special tool required for around $40 and the impeller for around $55 from a car parts type place.
I have Michelin tires and mine has NO vibration - an excellent car. This dude is probably a Lexus or BMW salesperson...
I am the owner of a 2002 Cadillac SLS. The front end was vibrating at 18,000 miles. The tie rods was replaced by a Cadillac Dealer. I replaced the Goodyear tires with another set of Goodyear tires. I still had a vibration at the front end. The Cadillac service manager told me that I should have bought a set of Michelin tires.
I compared the 2006 Buick Lucerne CXL V8 and my 2002 Cadillac SLS on the Kelly Blue Book Comparison link and I found them to be almost the same.
Well I just put a set of Michelin Energy MXV4 Plus tires on my 2000 STS and the vibrations is still there with 32 psi, but when I lowered it to 31 just 1 pound it was better I'm going to try 30 next.
Before dropping your tire pressure any further, take the car to a wheel and tire shop and have them check the balance of the tires. This is a cheap way of determining what is wrong.
2002 Caddilac STS fully loaded, 28,000 miles on the road. Have already had to replace batteries four times and now the fifth time is only one month since the fourth battery was replaced. Dealership replaced a computer module for the third battery, found nothing on the fourth battery replacement. Any similar complaints out there? Any fixes?
I have a 2000 Seville STS and have had oil consumption problems as well as the annoying vibration. Cadillac performed oil consumption tests over a 30,000 mile period before admitting it consumed more oil than was permitted per spec. They rebuild the engine at 65000 and 67000, the engine block cracked and Cadillac replaced the entire engine. No issues with the dealer. They were always courteous and cooperative. The vibration problem has not been resolved with tires. My first set was Michelans and my second set are BF Goodrich. The car vibrated with both sets. Vibration feels like an out of round or unbalanced tire. Starts at 60 mph. Seems to change intensity with road types and conditions. Am getting them rebalanced again next week and if that doesn't work, I will try "load force balancing" though I'm not sure what this is and if it will really work. From the various comments, looks like it's a design problem.
I have a 2002 Deville with 21,000 miles the engine is using approximately two quarts of oil every 3,000 miles. My dealer states that it is a normal condition for the vehicle. I don't. My concern is to eliminate the problem. the vehicle is not leaking any oil. Please help. Thank you.
I was at the dealership today and also complained of the oil consumption, and this is my second Seville STS. My first was 2000 150K, and this one has 40K and he checked what I was complaining about; the oil level is full half way between the checker marks on the dip stick, and if you fill it to the top of the mark, it will get rid of it thru a waste department in the engine, the tech stated, so I will keep an eye on this. I was never told this before.
I had a friend, and the service replaced his heads, lifters and seals, and corrected it. I had my Caddy 3 stage cleaning to decarbon the engine.
Good luck, there is not a better vehicle out there if you have a great technician.
I have a 2002 Cadillac Seville STS.. It only has a vibration when I go up hill! Can't figure it out.. Think it's an axle or something.
I have a 2002 SLS with 85,000 miles, and was told by the person who services my car to step on it from time to time to help slow the excessive oil consumption. Now when I do that and hit higher RPM's, the car sounds like I'm driving over a washboard. Once I let off the gas, the noise goes away.
Other than that, there are no issues with the car. The motor runs fine, the trans is working fine. Does anyone have any ideas?
Again, this only happens when I floor it and the passing gear kicks in. There seems to me no transmission issues at any other times. Could it be some type of a rev-limiter?
Thanks in advance for any assistance.
Maybe you should try unplugging the computer and waiting a few minutes, plug it back in and try starting the car. You need to unplug the cords from the computer, and not just unhook the battery.
I don't know if this will fry your computer, so be careful. My father had a car that would die, and he did this and it would start back up. Of course this was a car from the 1980s, and it was a Mercury.
I have a 2002 STS.
Same problems, vibrations at 60-70, oil consumption.
Can live with that, but sun roof won't function. Starts, then appears to go off track on one side and get jammed. Dealer said I should replace the entire unit, as it can't be fixed.
Any suggestions? Igrant1938@gmail.com
We just purchased a 2002 Cadillac Seville STS with 126,000 miles on it. It's running great... just needed some new tires.
There is one problem, and they told us when we bought it. They told us that it needed a new module that controls the electronics (power locks, trunk release, fuel tank release, sunroof). There are also other things that aren't working, and we don't know if this module controls them --- interior lights (including the mirror lights), rear defrost, 6 disc CD changer, passenger rear window doesn't work, and back up lights/sensors don't work. We've checked all the fuses, and they seem to be OK.
Can someone tell us what the problem could be? I've been ripped off before (spending over $1000 on a digital display module, only to find out a week later that it was just a fuse!), so I'd like to know if anyone knows what this could be?
There is one problem, and they told us when we bought it. They told us that it needed a new module that controls the electronics (power locks, trunk release, fuel tank release, sunroof). There are also other things that aren't working, and we don't know if this module controls them --- interior lights (including the mirror lights), rear defrost, 6 disc CD changer, passenger rear window doesn't work and back up lights/sensors don't work. We've checked all the fuses, and they seem to be OK.
Can someone tell us what the problem could be? I've been ripped off before (spending over $1000 on a digital display module, only to find out a week later that it was just a fuse!), so I'd like to know if anyone knows what this could be.
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