1999 Cadillac Sls problems

Overview of popular issues
Analysis of common problems
Сomplaints list

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Common 1999 Cadillac Sls problems

The 1999 Cadillac Seville, also known as the SLS, is a luxury vehicle that has been reported to have several common problems based on complaints from owners.

One of the most common problems reported is a leaking trunk. This issue is often caused by a faulty rubber seal around the edge of the trunk, which can allow water to enter the trunk when it rains. In some cases, the water may come from a gutter downspout or a black tube in the trunk, which needs to be properly routed and secured to prevent leaks.

Another common issue reported by owners is problems with the power windows and door locks. In some cases, the passenger and rear power windows may not work at all, while the lock switches on all doors may be inoperable. The driver's side power seat and heat may also be affected, as well as the power adjuster for the steering wheel. These issues may be related to electrical problems or faulty components within the doors or seats.

In addition to these issues, some owners have reported problems with the sunroof and windows. Specifically, condensation may build up on the inside of the sunroof, and the windows may become foggy. This may be caused by a variety of factors, including humidity, temperature changes, or faulty seals around the sunroof or windows.

Finally, several owners have reported problems with the electrical system, including issues with the air bags, fuel system, and power train. These issues may be caused by faulty sensors, wiring, or other components within the vehicle.

In summary, the 1999 Cadillac Seville has several common problems reported by owners, including leaking trunks, issues with power windows and door locks, problems with the sunroof and windows, and electrical system issues. These problems may be caused by a variety of factors, including faulty components, wiring issues, or environmental factors. If you own a 1999 Cadillac Seville and are experiencing any of these issues, it may be worth consulting with a qualified mechanic or dealership to diagnose and repair the problem.

What is the mpg on a 1999 Cadillac Seville SLS?

17 mpg city/26 mpg highway

EPA fuel economy: 17 mpg city/26 mpg highway.

What is the difference between a Cadillac STS and SLS?

Chinese Cadillac SLS

It was assembled by Shanghai GM. Compared to the STS, the SLS has a longer wheelbase, unique interior appointments, and a near-identical exterior appearance. Engine choices included the 2.8-liter LP1 V-6, 3.6 LY7 V-6 and the 4.6-liter Northstar V-8 as in the STS V-8 from 2007 to 2009.

What is the 0 60 on a Cadillac Seville SLS?

0–60 mph times were 7.4 seconds for the SLS and 6.9 seconds for the STS.

Is a Cadillac SLS a Seville?

General Motors used the Cadillac SLS nameplate for the following vehicles: The fourth generation Cadillac Seville, produced from 1992-1997. The fifth generation Cadillac Seville, produced from 1998-2004.

What is the mpg on a 1999 Cadillac Seville SLS?

17 mpg city/26 mpg highway

EPA fuel economy: 17 mpg city/26 mpg highway.

What is the difference between a Cadillac STS and SLS?

Chinese Cadillac SLS

Is the Cadillac SLS a Seville?

What is the 0 60 on a Cadillac Seville SLS?

0–60 mph times were 7.4 seconds for the SLS and 6.9 seconds for the STS.

1999 Cadillac Sls car problems categorized by type of issue

After analyzing all complaints sent to the NHTSA and researching popular Cadillac Sls problems, we found that the most common problems with these 2023 model year vehicles are:

Electrical system problems
Engine and engine cooling problems
Fuel system problems
Gasoline problems
Electronic stability control problems

The graph below shows statistics for all 1999 Cadillac Sls vehicle components and the number of complaints received.

1999 Cadillac Sls complaints

The NHTSA has received 5 complaints about various vehicle components related to the 1999 Cadillac Sls.

2014-04-10

ELECTRICAL SYSTEM PROBLEM

Date Of Incident: 2012-04-11
VIN: 1G6KS54Y4XU
Components: ELECTRICAL SYSTEM
Summary: WHILE MY WIFE WAS DRIVING THE CAR AT ABOUT 38 MILES AN HOUR THE CAR JUST DIED OR CUT OUT ( THE IGNITION SYSTEM QUIT ), ON HER. THIS HAPPENED ON TWO DIFFERENT TIMES FOR HER AND ONCE FOR MYSELF. *TR

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2012-01-03

ELECTRICAL SYSTEM PROBLEM

Date Of Incident: 2011-12-30
VIN: 1G6KS54Y3XU
Components: ELECTRICAL SYSTEM
Summary: IT WAS DETERMINED BY MY LOCAL CADILLAC SERVICE DEPARTMENT THAT THE ALTERNATOR WAS FAULTY, DRAWING EXCESSIVE CURRENT WHILE THE ENGINE WAS OFF. I MENTIONED THE RECALL ON THIS MODEL AND THEY SAID IT HAD ALREADY BEEN REPLACED SO IT IS NOT COVERED. I FEEL THAT THIS IS AN ONGOING PROBLEM AND SHOULD BE REPLACED UNDER THIS PROGRAM. *TR

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2010-02-02

ENGINE AND ENGINE COOLING PROBLEM

Date Of Incident: 2003-03-15
Components: ENGINE AND ENGINE COOLING
Summary: BOUGHT AUTO 2003,AFTER 3MO AUTO ENGINE WOULD SHUT OFF WITHOUT WARNING AT ANY SPEED,HIGHWAY OR IN DRIVEWAY. TOOK AUTO TO DEALER AND AUTO KEPT FOR 3 DAYS AND DEALER UNABLE TO DUPLICATE PROBLEM. TOOK AUTO BACK 5 OTHER TIMES AND SAME RESULTS EACH TIME. COMPLETE TUNEUP WAS DONE THAT COST OVER $500.00 DOLLARS ,VACUUM HOSES REPLACED,IGNITION INSPECTED ,COMPLETE COMPUTER DIAGNOSTIC ELECTRICAL COMPONENT CHECKS. AUTO STILL DIES WITHOUT WARNING. SOMETIME WITHIN 2WKS AND SOMETIMES WITHIN 2MOS. *TR

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2007-11-24

FUEL SYSTEM, GASOLINE PROBLEM

Date Of Incident: 2007-11-21
Fire: 1
VIN: 1G6KS54Y1XU
Components: FUEL SYSTEM, GASOLINE
Summary: UPON STARTING MY CAR THEIR WAS A BACK-FIRE UNDER THE HOOD. I AGAIN STARTED THE CAR AND DROVE ABOUT TWO MILES TO MY HOME AND PARKED THE CAR IN THE GARAGE. I THEN ENTERED THE HOUSE THROUGH THE GARAGE DOOR AND STARTED LOOKING FOR RECEIPTS FOR CHARGES I MADE AT THE GROCERY STORE AND CHARGES I MADE REFUELING THE CAR. I WAS UNABLE TO FIND THE CHARGES MADE AT THE GAS STATION. I THEN RETURNED TO THE GARAGE TO LOOK IN THE VEHICLE FOR THE RECEIPT. AT THIS TIME I NOTICED SMOKE COMING FROM UNDER THE HOOD OF THE CAR. I OPENED THE HOOD TO FIND THE INSULATION SMOLDERING THAT IS ATTACHED TO THE HOOD OF THE AUTOMOBILE. I THEN GRABBED A SPONGE AND SOAKED IT IN A PAIL OF WATER THAT WAS IN THE SET-TUB LOCATED IN THE GARAGE. I PUT OUT THE FIRE THAT WAS NOW STARTING TO BURN UNDER THE HOOD. I CAN ONLY IMAGINE WHAT MIGHT HAVE HAPPENED IF I DIDN'T LOOK FOR THE RECEIPT AT THAT TIME SEEING AS HOW THE GARAGE IS UNDER THE ROOF OF MY HOME. NOTE: I HAD NOTICED ONCE BEFORE THAT PART OF THE INSULATION HAD BURNED UNDER THE HOOD OF THE CAR. THIS WAS A BURN ABOUT 12 INCHES SQUARE ON THE LEFT SIDE OF THE ENGINE NEAR THE MIDDLE OF THE HOOD. I ALWAYS WONDERED HOW THIS MIGHT HAVE HAPPENED. AT PRESENT THE AREA THAT HAS BURNED IS NOW ABOUT 18 INCHES IN DIAMETER. *TR

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2006-08-24

ELECTRONIC STABILITY CONTROL,SERVICE BRAKES, HYDRAULIC,ENGINE AND ENGINE COOLING PROBLEM

Date Of Incident: 2006-04-02
VIN: 1G6KS54Y7XU
Components: ELECTRONIC STABILITY CONTROL,SERVICE BRAKES, HYDRAULIC,ENGINE AND ENGINE COOLING
Summary: WHEN I FIRST PURCHASED THE CAR IT HAD A CRACKED HEAD AND MANY OTHER MINOR PROBLEMS. I REPEATEDLY BROUGHT IT BACK TO THE DEALERSHIP AND THEY TOLD ME THAT THERE WAS NOTHING WRONG WITH THE CAR. I AM STILL EXPERIENCING A "CHECK GAS CAP" WARNING AND I HEAR A CLICKING NOISE COMING FROM THE REAR RIGHT SIDE EVERYTIME I APPLY THE BRAKES. ALSO I HEAR A RATTLING NOISE EVERYTIME I HIT ANY SIZE OF BUMP. *JB

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Additional sources

More sources of information about 1999 Cadillac Sls problems:

99-04 Cadillac Seville STS thoughts? | Bob Is The Oil Guy

https://bobistheoilguy.com/forums/threads/99-04-cadillac-seville-sts-thoughts.162456/

Oct 3, 2011 ... There's a lot of aluminum in the engine, a lot of aluminum in the suspension, the unibodies generally don't have rust issues, overall, they're ...

1999 Cadillac Seville Problems and Complaints - 77 Issues

https://repairpal.com/1999-cadillac-seville/problems

Problem with your 1999 Cadillac Seville? Our list of 77 known complaints reported by owners can help you fix your 1999 Cadillac Seville.

Common 1999 Cadillac Seville STS Problems - Q&A

https://www.justanswer.com/cadillac/2hrbo-1999-cadillac-sevillve-sts-tourning.html

Sep 3, 2009 ... What causes electrical problems with my 1999 Cadillac sevillve sts tourning? · 1. Check for communication with the Rear Integration Module (RIM) ...

1999 STS Northstar problems | Cadillac Owners Forum

https://www.cadillacforums.com/threads/1999-sts-northstar-problems.240920/

Sep 22, 2011 ... I am currently looking at a 1999 sts with the northstar v8 and i have some questions / concerns. It has 160xxx miles the power steering gets ...