Cadillac Service Repair Manuals

1980 Eldorado

1980 Eldorado

Downsized the year before, Eldorado entered 1980 with few significant changes beyond a bolder crosshatch grille pattern, dominated by vertical bars. Its upper horizontal bar, with Cadillac script, peaked forward and upward. Quad rectangular headlamps sat above amber-lensed parking/signal lamps, with wide horizontal cornering lamps on the fenders. An Eldorado script was behind the front wheel openings, just above the bodyside molding. Wide rocker panel moldings stretched all the way front to rear. Atop the hood was a Cadillac wreath and crest. New two-tone paint schemes were offered. Multi-slot style wheel covers were standard. So was Heather knit-cloth pillow-type front upholstery, offered in six colors for the Dual Comfort 50/45 front seats (for two people). Customers could also select from 10 leather possibilities.

1980 Eldorado

1980 Eldorado

The instrument panel featured simulated teak woodgrain. Eldorado enjoyed an improved EPA fuel mileage rating as a result of the 6.0-liter V-8 with electronic fuel injection. A new MPG Sentinel was available with the DFI engine, which also offered new on-board computer diagnostics. New Electronic Climate Control offered digital accuracy. An optional Cabriolet roof of textured Elk Grain vinyl came in 15 colors, including matching Firemist shades. The optional theft-deterrent system now disabled the starter motor.

1980 Eldorado

1980 Eldorado

Eldorado Biarritz rode cast aluminum wheels and carried a number of unique styling accents, including an exclusive brushed stainless steel front roof section. The wide chrome molding crossing over that roof continued all the way to the front fenders. Biarritz script and opera lamps enhanced the rear roof pillars, and the model also featured accent stripes. Inside, the tufted pillow-style interior came in seven leather choices; or slate gray Heather knit fabric. The steering wheel was leather-trimmed. Biarritz carried a price tag of $18,003, compared to $15,509 for a base Eldorado.


ModelSeries NumberBody/Style NumberBody TypeSeatingFactory PriceShipping WeightProduction Total
Eldorado6EL572-door Coupe4$15,5093806 lb52,683

PRICE NOTE: Cadillac announced a series of price rises during the model year. By summer. Eldorado cost $16,401.


FeatureBase EngineOptional DieselCalifornia engine
Type90-degree, overhead valve V-8. Cast iron block and head
Displacement368 cu. in. (6.0 liters)350 cu. in. (5.7 liters)350 cu. in. (5.7 liters)
Bore & stroke3.80 x 4.06 in.4.057 x 3.385 in.4.057 x 3.385 in.
Compression ratio8.2:122.5:18.0:1
Brake horsepower145 @ 3600 rpm105 @ 3200 rpm160 @ 4400 rpm
Torque270 lbs.-ft. @ 2000 rpm205 lbs.-ft. @ 1600 rpm265 lbs.-ft. @ 1600 rpm
Main bearingsFive
Valve liftersHydraulic
Fuel Supplydigital fuel injectionFuel injectionFuel injection
VIN Code9N8


Wheelbase114.0 in.
Overall length204.5 in.
Height54.2 in.
Width71.5 in.
Front Tread59.3 in.
Rear Tread60.6 in.
Standard TiresP205/75R15 SBR wide WSW.


TransmissionTurbo Hydra-matic transmission, column shift.
Gear ratio(1st) 2.74:1; (2nd) 1.57:1; (3rd) 1.00:1; (Rev) 2.07:1.
Standard final drive ratio2.19:1.
Drive AxleHypoid drive axle.
Steeringrecirculating ball; power assisted.
Front suspensionindependent torsion bars, link-type stabilizer bar
Rear suspensionindependent trailing arm, coil springs, electronic level control
Brakesfour-wheel disc
Fuel tank20.6 gal. Unleaded fuel only


5.7-liter diesel V-8 engineEldo: $266
Heavy-duty cooling system$59
100-amp alternator$41-$59
Engine block hearer$22
California emission equipment$83-$250
Sport handling pkg.$95
Trailering package$100-$118


Eldorado Cabriolet$363
Eldorado Biarritzleather seating: $2937
Eldorado Biarritzcloth seating: $2494


Cruise control$147
Rear defogger, grid-type$170
Six-way Dual Comfort power passenger seat adjuster$171
Power driver's seat recliner$130
Tilt/telescope steering wheel$142
Automatic door locks$129
Garage door opener$125
Theft deterrent system$153
Guidematic headlamp control$72
Front light monitor$35
Trumpet horn$26
Electric remote-control left mirror w/thermometer$97
Lighted thermometer on left mirror$30
Lighted vanity mirrors, pair$112
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
Electronic-tuning seek/scan AM/FM stereo radio with cassette and CB$510
Firemist paint$201
Door edge guards$16-$24
License frameeach: $11
Leather seating area$435-$595
Carpeted rubber front floor mats$35-$38
Carpeted rubber rear floor mats$19
Trunk mat$15
Cast aluminum wheelsEldo: $376
Locking wire wheel covers$262-$320
Puncture-sealing tires$105

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