1999 Cadillac Seville problems & reliability
73 owner complaints filed with NHTSA for the 1999 Cadillac Seville. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
4 complaints report injuries (4 injured).
Federal crash records (FARS 2020–2023): 1999 Cadillac Seville vehicles were involved in 2 fatal crashes with 0 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Engine and Engine Cooling → | 23 | 32% |
| Electrical System → | 16 | 22% |
| Suspension | 9 | 12% |
| Service Brakes, Hydraulic | 8 | 11% |
| Steering | 8 | 11% |
| Air Bags | 5 | 7% |
| Vehicle Speed Control | 4 | 5% |
| Engine | 3 | 4% |
| Equipment | 3 | 4% |
| Exterior Lighting | 3 | 4% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 51,802 miles (middle 50% between 42,914 and 82,750 miles), based on 24 complaints that included mileage.
Complaints by incident year
What owners report
“The hard fuel rail line has begun to leak and no GM dealers carries parts to resolve problem. The 1999 STS Cadillac is in good working condition but because of the leak, it is unsafe to drive.”
Fuel/propulsion System · filed Jun 12, 2022
“Tl* the contact owns a 1999 cadillac seville. The contact stated that after the vehicle was started, the temperature gauge displayed that the vehicle was overheating. The vehicle was not diagnosed however, the temperature gauge and the water pump was replaced but the failure recurred. The manufacturer was not notified…”
Engine · filed May 3, 2016
“Tl* the contact owns a 1999 cadillac seville. The contact stated that there was oil leaking from the vehicle. In addition, there was smoke and an abnormal odor. The exhaust manifold and the engine were being affected by the failure which could result in a fire. The vehicle was taken to the dealer who replaced eleven…”
Engine · filed Oct 29, 2015
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- CADILLAC COOLANT COOLED ALTERNATOR FIRES
Recall Query RQ99013 · opened Jun 10, 1999 · closed Feb 22, 2002 · led to recall 99V070000
Technical service bulletins
97 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1999 Cadillac Seville. The 10 most recent:
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
17-NA-073 · Service Bulletin/Repair Instructions · issued Feb 21, 2023
This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8…
PIP4723F · Service Bulletin/Repair Instructions · issued Jan 14, 2022
This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8…
PIP4723D · Service Bulletin/Repair Instructions · issued Jan 31, 2020
This Preliminary Information communication provides information to the technician on how to unlock radios that are Delco TheftLock. Technician will use the radio to get the scrambled code. Technician will need to…
PIC4696E · Service Bulletin/Repair Instructions · issued Nov 22, 2019
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
17NA073 · Service Bulletin/Repair Instructions · issued Sep 18, 2019
This Preliminary Information communication provides information to the technician on how to unlock radios that are Delco TheftLock. Technician will use the radio to get the scrambled code. Technician will need to…
PIC4696D · Service Bulletin/Repair Instructions · issued Sep 5, 2019
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
17NA073 · Service Bulletin/Repair Instructions · issued Feb 15, 2019
This Preliminary Information communication provides information to the technician on how to unlock radios that are Delco Theft Lock. Technician will use the radio to get the scrambled code. Technician will need to…
PIC4696C · Service Bulletin/Repair Instructions · issued May 31, 2018
This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8…
PIP4723C · Service Bulletin/Repair Instructions · issued Sep 20, 2017
This warranty administration bulletin provides policy information with the field action courtesy transportation policy.
17-NA-073 · Service Bulletin/Repair Instructions · issued Mar 15, 2017
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 1999 Cadillac Seville in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1999 Cadillac Seville?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 51,802 miles — budget accordingly if the car is approaching that mileage.