Elite Dealer

1978 Cadillac Seville

Michigan

$35,995

Vehicle Details

Make

Cadillac

Model

Seville

Year

1978

Mileage

31,914 miles

VIN

AMS23287

Body Type

Coupe

Transmission

Automatic

Description

1978 Cadillac Seville SLS This is a collectors edition Grand Opera coupe. What makes this car special is once upon a time it was a 4 door. Grandeur Motor Car Corporation took in 79 of these cars and did their long nose coupe conversion.

There is no rust whatsoever with 31k original miles. Please Note The Following **Vehicle Location is at our clients home and Not In Cadillac, Michigan. **We do have a showroom with about 25 cars that is by appointment only **Please Call First and talk to one of our reps at 231-468-2809 EXT 1 **

Cadillac Seville Buyer's Guide

Full guide

Sarah Whitfield

Pre-War Classics

1975–1985

~3 min read

Updated Apr 2026

Cadillac's sophisticated answer to Mercedes-Benz — the 1975–1979 Seville is a compact American luxury masterpiece that remains elegantly undervalued.

This guide covers

✓ 8-point inspection checklist

✓ Common issues & what to avoid

✓ In-person inspection guide

✓ Market pricing by year & condition

✓ 3 FAQs answered

✓ History & fun facts

Read the Full Seville Buyer's Guide

Cadillac Seville Market Overview

Based on 14 Cadillac Seville listings currently on ClassicCarsArena.com

Listed Now

$22,689

Avg. Asking Price

1958–1988

Year Range

Price Position on Our Site — Above Average

This car: $35,995

Low: $6,495 High: $54,995

Transmission Distribution

Automatic 93% ◄

Condition Distribution

Excellent 7%

Good 7%

Data from ClassicCarsArena.com listings Browse all 14 listings →

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Cadillac Seville Buyer's Guide

The Cadillac Seville represents Cadillac's most significant strategic pivot since the postwar era: a deliberate, sophisticated answer to the import luxury threat from Mercedes-Benz and BMW. Smaller, lighter, and more refined than any Cadillac before it, the Seville proved that American luxury could adapt to the 1970s energy crisis without sacrificing prestige. Today it is an affordable, elegant classic that rewards the discerning buyer who looks past badge snobbery.

What to Check Before Buying

✓

Test EFI system through cold start, warm idle, and hot restart (1975–1979) —

✓

Inspect Nova-platform floor pans and rocker panels for rust —

✓

Test all vacuum-operated accessories (windows, locks, climate) —

✓

On HT4100 cars: look for white exhaust, overheating history, and verify head bolt condition —

✓

Verify A/C function or assess R-12 to R-134a retrofit cost —

✓

Inspect leather interior condition — correct color/grain replacement is expensive —

✓

Check for diesel engine (identify by badging and exhaust color) — verify complete rebuild if present —

✓

Confirm trunk and interior dry — no water intrusion from roof or quarter windows —

Common Issues

The Bendix EFI on first-generation cars needs attention on most survivors — hot-start issues and lean surge are common. HT4100 head gaskets and head bolt thread pull-out are the defining problem of 1982–1984 cars — many have been poorly repaired. Diesel V8s require complete rebuilds if not recently done. Nova-based structure rusts in the usual floor and rocker locations.

What to Look For

The ideal Seville is a first-generation 1977–1979 car in a classic color combination — Cotillion White/Antique Saddle or Firethorn Red/Antique Parchment — with a sorted EFI system and dry, rust-free structure. These cars are still regularly found as estate vehicles with modest mileage and careful ownership. Avoid any car described as 'just needs the engine sorted' on HT4100 generations.

Price Guide

First-gen 1976–1979: $6,000–$12,000 driver; $14,000–$20,000 detailed. 1980–1981 bustle-back: $5,000–$14,000. 1982–1985 HT4100: $3,000–$8,000 (engine risk makes higher prices unjustifiable without specialist documentation). EFI rebuild budget: $800–$1,500.

Did You Know?

The Seville was the only American car with standard electronic fuel injection when it debuted in 1975. Its Nova platform underpinnings were the worst-kept secret in Detroit, yet the execution was so convincing that Road & Track compared it favorably to the Mercedes-Benz 280S. The bustle-back 1980 design was inspired by Hooper-bodied Rolls-Royces of the 1940s and 1950s — a direct reference to British coachbuilding tradition.

Elite Dealer

$35,995

1978 Cadillac Seville

Michigan

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