29th Mar 2005, 15:01

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.

21st Jan 2006, 22:48

I have Michelin tires and mine has NO vibration - an excellent car. This dude is probably a Lexus or BMW salesperson...

22nd Jun 2006, 00:36

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.

4th Oct 2006, 20:33

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.

5th Oct 2006, 15:03

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.

5th Jan 2008, 22:54

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?

9th Nov 2008, 00:59

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.

16th Nov 2009, 12:29

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.

16th Nov 2009, 21:04

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.

5th Jun 2010, 14:11

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.

11th Jun 2010, 16:08

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.

5th Jan 2012, 19:10

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.

24th Jan 2012, 22:22

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

1st Oct 2012, 14:20

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?

Thank you!

2nd Oct 2012, 17:47

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.

Thank you!