Deville Cadillac Moels & Historyd 1979

Appearance changes for DeVille/Fleetwood included restyled taillamps and a revised front-end look, plus new interior trim. This year’s grille had many more horizontal and vertical bars in its simple crosshatch pattern, designed to accentuate the traditional Cadillac front end look. “Cadillac” script returned this year to the wide upper grille bar (driver’s side). A thin molding above the grille extended outward, over the headlamps, to wrap around each fender. Quad rectangular headlamps were outboard of twin vertical rectangular parking lamps. The crosshatch grille pattern repeated itself in either side of the license plate. In familiar Cadillac style. Front fenders held large cornering lamps with clear and amber lenses.

Seven new two-tone body color combinations were available for DeVille (and Fleetwood Brougham), with color-coordinated accent striping. New brushed chrome wheel covers showed the Cadillac crest on a black background. Also new: seatbelt chimes, a standard AM/FM stereo radio with digital display, dome light with dual spot map lamps, and optional electrically-controlled outside mirrors. Interiors were upholstered in Durand knit cloth (six colors) or genuine leather. Standard fittings included power door locks and windows, six-way power seat, and automatic climate control.

The standard 425 cu. in. (7.0-liter) V-8 had new EGR riser tubes. A fuel-injected, 195-horsepower version was optional. The Olds-built 350 cu. in. diesel V-8 became optional in mid-year.

Special editions for 1979 included a Custom Phaeton Coupe and Custom Phaeton Sedan, both offering styling touches intended to remind observers of the “classic” convertibles. Features included brushed chrome moldings with flush-mounted opera lamps and the Cadillac crest; reduced-size quarter windows; a sporty convertible-like roof; “Phaeton” script on each rear quarter panel; wire wheel discs; accent striping; 45/55 Dual Comfort front seats with leather seating; and leather-trimmed steering wheel. Phaeton editions came in three color combinations: Cotillion White with dark blue roof and white leather inside; Slate Firemist with black roof and antique state gray leather upholstery; or Western Saddle Firemist with dark brown roof and antique saddle leather seating.

Also on the option list was the DeVille d’Elegance, with new soft Venetian velour upholstery (in choice of four colors) on pillow-style 50/50 seats. It also had Tangier carpeting, special door pull handles, and “DeVille d’Elegance” script on the glove box and exterior. Coupe d’Elegance had opera lamps: sedans had three roof-mounted assist straps. Both bodies had side moldings and accent stripes. Coupe DeVille also came with a Cabriolet roof treatment, including chrome crossover roof molding, in 17 Elk Grain vinyl colors. A French seam surrounded the back window and a Cadillac script and crest identified the Cabriolet model.


Model No. Style Number Body Type Seating Factory Price Shipping Weight Production Total
6C D47 2-door Coupe 6 $11,139 4143 121,890
6C D69 4-door Sedan 6 $11,493 4212 93,211


Feature Base engine Optional fuel injected engine Optional diesel engine
Type 90-degree, overhead valve V-8. Cast iron block and head
Displacement 425 cu. in. (7.0 liters) 350 cu. in. (5.7 liters)
Bore & stroke 4.082 x 4.06 in. 4.057 x 3.385 in.
Compression ratio 8.2:1 22.5:1
Brake horsepower 180 @ 4000 rpm 195 @ 3800 rpm 120 @ 3600 rpm
Torque 320 lbs.-ft. @ 2000 rpm 320 @ 2400 rpm 220 lbs.-ft. @ 1600 rpm
Main bearings Five
Valve lifters Hydraulic
Fuel supply 4 Bbl. carburetor electronic fuel injection Electronic fuel injection
VIN Code S T N


Wheelbase 121.5
Overall length 221.2″
Height 54.4″ (coupe); 55.3″ (sedan
Width 76.5″
Front Tread 61.7″
Rear Tread 60.7″
Standard tire GR78 x 15-B SBR wide WSW


Transmission Turbo Hydra-matic transmission standard on all models; column shift.
Gear ratios (1st) 2.48:1: (2nd) 1.48:1; (3rd) 1.00:1; (Rev) 2.07:1.
Standard axle ratio 2.28:1
Rear Axle Hypoid rear axle
Steering Recirculating ball
Front suspension independent with ball joints and coil springs, stabilizer bar
Rear Suspension four-link coil springs, link stabilizer
Brakes front disc, rear drum
Ignition HEI electronic ignition.
Fuel tank 25 gal.


425 cu. in. V-8 Fl engine $783
5.7-liter diesel V-8 engine later in model year $849
Heavy-duty cooling system $49
80-amp alternator $54
Engine block heater $21
California emission equipment $83-$150
California fuel economy equipment $65
Limited slip differential $70
High altitude pkg. $35
Electronic level control $160
Trailering package $49-$103


DeVille Cabriolet $384
DeVille Cabriolet w/Astroroof $1522
DeVille Cabriolet w/sunroof $1312
DeVille d’Elegance $725
DeVille Custom Phaeton $2029


Astroroof (w/full vinyl roof $998
Astroroof (painted $1163
Sunroof (full vinyl roof $798
Sunroof (painted roof $953
Cruise control $137
Controlled-cycle wipers $38
Rear defogger, grid-type $101
Six-way Dual Comfort power passenger seat adjuster $125-$160
Power driver’s seat recliner $122
Power passenger seat recliner with six-way adjuster $221-$280
Power passenger seatback recliner, bench seat $122
Tilt/telescope steering wheel $130
Automatic door locks $121
Illuminated entry system $62
Fuel monitor $31
Theft deterrent system $137
Trunk lid release and power pull-down $85
Opera lamps $66
Twilight Sentinel $56
Guidematic headlamp control $91
Trumpet horn $22
Remote-control right mirror $40
Electric remote left mirror w/thermometer $90
Lighted thermometer on left mirror $28
Lighted vanity mirror, passenger $52
Electronic-tuning seek/scan AM/FM stereo radio with 8-track tape player $195
Electronic-tuning seek/scan AM/FM stereo radio with 8-track tape player and CB $480
Electronic-tuning seek/scan AM/FM stereo radio with cassette $225
Electronic-tuning seek/scan AM/FM stereo radio with CB $380
Two-tone paint, partial Firemist $361
Firemist paint $171
Padded vinyl root $225
Front bumper reinforcement $9
Chrome accent molding $90-$105
Accent stripes $56
Door edge guards $13-$20
License frame each: $10
Dual comfort front seats $208
Leather seating area $330-$350
Carpeted rubber front floor mats $33-$36
Carpeted rubber rear floor mats $16
Trunk mat $13
Turbine-vaned wheel covers $59
Aluminum wheels $350
Locking wire wheels $569-$628
Locking wire wheel covers $189-$292