1994 Cadillac Seville Problems

What owners report

Owners of this 1994 Cadillac Seville most often describe engine overheating and coolant loss, often from head bolt or head gasket failure, and oil leaks from the crankcase, oil pan or seals. Other reports involve battery post failures, smoke or fire from wiring and A/C parts, and brake failures. Most complaints were filed between 2000 and 2002, and mileage is often not stated.

1. 1
   Engine cooling

   Coolant loss, overheating or head bolt failures

   • 13 complaints (26%)
   • median 79,597 mi at 10.8 yrs old (2 state mileage, few)
   • 2 mention a crash, fire or injury
   • filed 1999–2005

   Owners describe engine overheating and coolant loss, and in some complaints dealers found head bolts that were stretched, loosened or stripped, which led to blown head gaskets. In one complaint an engine shut down on a mountain road, and in another a dealer recommended replacing the engine. Other complaints describe a heater core that ruptured and sprayed hot coolant onto a driver's foot, resulting in burns, and a brake line that rubbed through a coolant line. Recorded mileage ranges from 11,900 to 147,295 miles, and most were filed between 2000 and 2002.

   What to check: Ask whether the head bolts or cylinder head threads have been inspected or repaired, and request the coolant and gasket service history. During a test drive, watch the temperature gauge and check for coolant or wetness near the heater core hoses.

   2 excerpts from owner complaints in NHTSA records

   “I call the dealership about the system overheating after a few weeks of purchasing the vehicle. The dealership said they could not doing anything in helping me with the vehicle, not even towtruck. I call the dealership again before my warranty is about to expired and he said he could not do anything to help me. The brakes were bad on the car and the cooling system had a hole in it.”

   NHTSA complaint #10070788, filed 2004-01, 11,900 miles

   “I was told the brake line rubbed through the coolant line causing coolant 134 to leak out and possibly damaging brake line. I was sicken every time I used my car till the air condition compress stop working.”

   NHTSA complaint #722645, filed 2000-05
2. 2
   Engine cooling

   Oil leaks from crankcase, oil pan or seals

   • 12 complaints (24%)
   • typically at 7.3 yrs old
   • filed 1997–2005

   Owners describe oil leaking from the crankcase, a lower crankcase seal, the oil pan or a joint seal, with some saying the oil reached the exhaust or catalytic converter. One describes a metallic ticking or knocking noise along with the leak. According to complaints, the manufacturer was aware of the problem, and some owners were told it would not pay for repairs outside the warranty. Mileage is not stated in these complaints, and most were filed between 2000 and 2002.

   What to check: Check the oil level and look for fresh oil around the crankcase, oil pan and lower seals. Ask whether the oil pan or crankcase seal has been replaced and request the repair history.

   2 excerpts from owner complaints in NHTSA records

   “Oil pan gasket leaking.....theres been a service bulliten alert put out on this in feb. 1996. My transmission was replaced in 1997 and the gasket should have been replaced at this time. Oil is leaking fairly bad and I was informed by Cadillac mechanic that the oil going back on the exhaust system and the cad. Converter could caught fire. I'm trying to get cadallic to replace this gasket at their cost. They want to charge me $1500.00 to replace this $28.00 part. Any help you could give me would be greatly appreciated.”

   NHTSA complaint #717968, filed 2000-01

   “There is a known problem with crank case lower seal on the 4.6 northstar engine and manufacturer has not responded. Oil leak is hitting exaust and cat converter which could cause a fire. This should be a safety issue and a recall for repair. There is a TSB on this issue , but no recall. I want a fix!!! Local dealer wants over $2000 for repair! Dt”

   NHTSA complaint #769791, filed 2002-11
3. 3
   Electrical system

   Smoke or fire from wiring, hoses or A/C clutch

   • 15 complaints (30%)
   • median 116,000 mi at 11.7 yrs old (5 state mileage, few)
   • 7 mention a crash, fire or injury
   • filed 1996–2014

   Owners describe smoke, burning plastic or a hot electrical smell, and in one case a car burned after being shut off and left parked. Others describe an A/C compressor clutch that contacted an oil cooler hose or power steering line, with one owner saying a recall for that hose was never received and believing it led to a vehicle fire. A heater blower motor cover that was crumbling and exposing insulation near the exhaust was also reported. Filed between 1999 and 2014, and where mileage is stated it ranges from 140 to 188,000 miles.

   Recall 94V158000

   What to check: Look for oil or heat damage near the A/C compressor, power steering lines and under-hood wiring, and ask whether recall 94V158000 has been completed. Check that the heater blower motor cover is intact and ask the dealer about any past smoke or electrical repairs.

   2 excerpts from owner complaints in NHTSA records

   “This vehicle is factory equipped with a delco/bose sound system. I was driving down my driveway at 5 MPH. After approximately 3 minutes and 1/4 mile, the radio sound became distorted and interrupted. The vehicle's voltage display indicated 13.3 volts, rather than the normal 14.2 or above. I turned off the radio. I noticed an odor I identified as hot electrical. I immediately pulled into a neighbor's driveway and shut off the vehicle's ignition key. …”

   NHTSA complaint #10627490, filed 2014-08, 188,000 miles

   “I own a 1994 Cadillac 4 door Seville. I am the second owner. Recently while attempting to tune up the vehicle, I discovered that the plastic cover covering the heater blower motor mounted on the firewall had literally began to disintegrate. This exposed the inside insulation which is within inches of the exhaust manifold and could cause a fire if not protected. I have taken digital photos of the area and can present them to the NHTSA as soon as possible. …”

   NHTSA complaint #10147957, filed 2006-01, 140 miles
4. 4
   Electrical system

   Battery post failures and electrical faults

   Mentioned in 4 of 37 sampled complaints

   Owners describe the positive battery post cracking, leaking acid, or opening while driving, which left the car unable to start. In another complaint, corrosion on the positive terminal bolt was linked to a failure of the whole electrical system, and an owner says the battery had to be changed almost every year without a known cause. A later complaint describes radio distortion, a lower than normal charging voltage reading, and a hot electrical smell with smoke. Recorded mileage ranges from 63,070 to 188,000 miles, and filings run from 2000 to 2014.

   What to check: Check the positive battery post and cable for cracks, corrosion or acid residue, and ask for the battery replacement history. Measure charging voltage with the engine running and check that the horn and radio work normally during the test drive.

   2 excerpts from owner complaints in NHTSA records

   “While driving, vehicle's positve battery post will open causing vehicle to shut off and unable to start. Dealer notified. Ts dealership stated stress on the positive terminal caused the vehicle to die out, the battery to crack and leak acid. Corrosion was also found in the battery tray and the battery and cables had to be replaced. This is the fourth battery replaced.”

   NHTSA complaint #10001949, filed 2003-01, 63,070 miles

   “Almost every year consumer has to change electric battery without dealer knowing what is causing this problem, and there is no indication of it. Horn malfunctions.”

   NHTSA complaint #863430, filed 2000-06
5. 5
   Brakes

   Brake failures and brake line damage

   Mentioned in 4 of 37 sampled complaints

   Some owners say the brakes did not work as expected on a wet road at low speed, and the vehicle crashed. Another says the rear brakes locked up repeatedly while driving, with the pads smoking and catching fire. One complaint describes a brake line that rubbed through a coolant line, and another says the brakes were bad shortly after purchase while the cooling system had a hole. Recorded mileage ranges from 11,900 to 116,000 miles, and filings run from 2000 to 2004.

   What to check: During a test drive, confirm the brakes stop evenly and do not lock or pull, and check the pads and calipers for heat or uneven wear. Ask whether any brake line is rubbing against a coolant hose or other component.

   2 excerpts from owner complaints in NHTSA records

   “Rear brakes locked up while driving five times in the past year, causing the rear brake pads to smoke and catch on fire. Consumer replaced the rear calipers/rotors and master cylinder. Consumer called gmc, and was told that warranty expired, and there was nothing they could do. Each time this happened consumer was in heavy traffic, and was almost rear ended.”

   NHTSA complaint #10045782, filed 2003-11, 116,000 miles

   “While driving between 15-25 MPH on a wet road applied brakes to avoid rear ending a vehicle in front, but brakes did not work and vehicle crashed. Dealer was contacted. Please provide more information.”

   NHTSA complaint #8002840, filed 2002-01

Buying note. Before buying a 1994 Seville, ask for records of head bolt, head gasket and oil leak repairs, and check the coolant and oil levels during the inspection. Also check the battery posts and the A/C compressor area, since complaints describe battery post failures and smoke or fire reports tied to wiring and A/C parts.

Summary written with AI from a sample of 37 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.