For some," the 1979 catalog proclaimed, a Cadillac was "an integral part of the good life. For some the fulfillment of a promise they made to themselves long ago." Could be, but apart from a daringly downsized E-body Eldorado, the year-brought few stunning announcements. A new electronic-tuning AM/FM stereo radio with signal seeker and scanner included digital display of time and station frequencies. A new convex remote-control right mirror to increase the field of view was standard on Broughams and limos, optional on DeVilles. Lap seatbelts were the new "free-wheeling" style, and chimes now gently warned passengers to buckle up. A new dome light had dual spot map lamps. Seville and Eldorado could have an optional Trip Computer with digital display that showed
DeVilles, Fleetwood Broughams, and limousines were powered by a 425 cu. in. (7.0-liter) V-8 with four-barrel carburetor; a fuel-injected version again was available. Oldsmobiie's diesel V-8, first offered only on Seville and Eldorado, could go under DeVille/Brougham hoods by year's end. Options for the year Included dual electric remote mirrors; an automatically-retracting radio antenna; plus 8-track and cassette tape players (with built-in 40-channel CB available).
| Cadillac's 13-symbol Vehicle Identification Number (VIN) was again on the upper left surface of the cowl, visible through the windshield. |
| Coding was similar to 1977-78. |
| The model year code changed to "9" for 1979. |
| The body type code for Eldorado coupe changed to "57". |
Assembly plant codes were:
|
| Sequence numbers began with 100001 at Detroit (except 450001 for Seville); 600001 at Linden; and 350001 at South Gate. |
| Eldorado's body identification plate was on the top right side of the cowl. |
| Diesel Seville body plates were on the top left side of the cowl. |
| 
| 
| 
| 
| 
|
|---|