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American Brands: GM 
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GM Archive
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![In 1981, Cadillac rolled out a new version of its 368-cid V-8 engine with a “modulated displacement” (cylinder deactivation) system that let it run on eight, six, or four cylinders […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2025/10/1981-Cadillac-Fleetwood-Brougham-dElegance-Bordeaux-Red-Mecum-Auctions-W125-front-3q-high-inset.webp?resize=115%2C115&quality=70&ssl=1 "1981 Cadillac V8-6-4: The Real Reason Cadillac Dropped Its “Modulated Displacement” Engine After Only A Year")
1981 Cadillac V8-6-4: The Real Reason Cadillac Dropped Its “Modulated Displacement” Engine After Only A Year
Posted on October 19, 2025 | 49 CommentsIn 1981, Cadillac rolled out a new version of its 368-cid V-8 engine with a “modulated displacement” (cylinder deactivation) system that let it run on eight, six, or four cylinders […] -
![Until the 1970s, GM automotive divisions made most of their own engines, leading to a confusing array of completely different engines of similar displacements. For example, Buick, Chevrolet, Oldsmobile, and […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2025/10/1955-GM-V-8-engines.webp?resize=115%2C115&quality=70&ssl=1 "Why Chevrolet, Pontiac, Oldsmobile, Buick, And Cadillac (Mostly) Had Their Own Engines")
Why Chevrolet, Pontiac, Oldsmobile, Buick, And Cadillac (Mostly) Had Their Own Engines
Posted on October 12, 2025 | 41 CommentsUntil the 1970s, GM automotive divisions made most of their own engines, leading to a confusing array of completely different engines of similar displacements. For example, Buick, Chevrolet, Oldsmobile, and […] -
![Anyone familiar with older GM cars has probably encountered the Delco signal-seeking radios that GM cars began offering in the early ’50s. I recently came upon a very strange 1956 […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2025/10/LIFE-1956-04-23-crop.webp?resize=115%2C115&quality=70&ssl=1 "1956 Delco Station-Seeking Radio Ads: “Touch The Wonder Bar, Dilworth”")
1956 Delco Station-Seeking Radio Ads: “Touch The Wonder Bar, Dilworth”
Posted on October 11, 2025 | 25 CommentsAnyone familiar with older GM cars has probably encountered the Delco signal-seeking radios that GM cars began offering in the early ’50s. I recently came upon a very strange 1956 […] -
![At this point I am beginning to believe that it is no coincidence that vehicles with red interiors are the ones in the best condition as they hit the junkyard. […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2019/09/IMG_4740.jpg?resize=115%2C115&quality=75&ssl=1 "Junkyard Classic: 1990 Oldsmobile Eighty Eight Royale – No Cheese With This Royale")
Junkyard Classic: 1990 Oldsmobile Eighty Eight Royale – No Cheese With This Royale
Posted on September 11, 2025 | 13 CommentsAt this point I am beginning to believe that it is no coincidence that vehicles with red interiors are the ones in the best condition as they hit the junkyard. […] -
![Although a 1969 GTO convertible ignited my love for General Motors products at the tender age of 20 or 21, GTOs mostly escape my notice anymore. In my sleepy little […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2016/07/009a.jpg?resize=115%2C115&quality=75&ssl=1 "Car Show Classic: 1967 Pontiac Tempest — In A Sea Of GTOs, Such Stuff As Dreams Are Made On")
Car Show Classic: 1967 Pontiac Tempest — In A Sea Of GTOs, Such Stuff As Dreams Are Made On
Posted on September 2, 2025 | 15 CommentsAlthough a 1969 GTO convertible ignited my love for General Motors products at the tender age of 20 or 21, GTOs mostly escape my notice anymore. In my sleepy little […] -
![Although Hydra-Matic Drive was developed and manufactured by General Motors, GM’s Detroit Transmission Division also sold Hydra-Matic transmissions to outside automakers, including most of the U.S. independents and even […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2025/06/1940-Oldsmobile-Series-90-blue-Barrett-Jackson-front-3q-left.webp?resize=115%2C115&quality=70&ssl=1 "Early Hydra-Matic Users: Many Non-GM Automakers Bought This Pioneering Automatic Transmission")
Early Hydra-Matic Users: Many Non-GM Automakers Bought This Pioneering Automatic Transmission
Posted on June 22, 2025 | 17 CommentsAlthough Hydra-Matic Drive was developed and manufactured by General Motors, GM’s Detroit Transmission Division also sold Hydra-Matic transmissions to outside automakers, including most of the U.S. independents and even […] -
![“Just be yourself.” “You do you girl.” “Never let anyone dull your sparkle.” “Be whoever the *expletive* you wanna be and screw the haters!!!” These are just a few of […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2024/09/PXL_20240819_160707298.jpg?resize=115%2C115&quality=75&ssl=1 "Curbside Classic: 2003 Saturn Ion – Ironing Out Our Differences")
Curbside Classic: 2003 Saturn Ion – Ironing Out Our Differences
Posted on September 20, 2024 | 21 Comments“Just be yourself.” “You do you girl.” “Never let anyone dull your sparkle.” “Be whoever the *expletive* you wanna be and screw the haters!!!” These are just a few of […] -
![(first posted 5/17/2018) In Part 1 (here), we looked at the way in which General Motors converted its A, B and C body shells from the old pre-war […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2018/05/1950-Cadillac-61-62-vert.jpg?resize=115%2C115&quality=75&ssl=1 "Automotive History: General Motors 1949-50 – The Mystery Of The Missing B Body (Part 2)")
Automotive History: General Motors 1949-50 – The Mystery Of The Missing B Body (Part 2)
Posted on May 17, 2024 | 40 Comments(first posted 5/17/2018) In Part 1 (here), we looked at the way in which General Motors converted its A, B and C body shells from the old pre-war […] -
![Lord, won’t you buy me an Oldsmobile sang no one ever, certainly not Janis, and not any of the legions of artists since. Yet here we were in the times […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2023/12/IMG_5251.jpg?resize=115%2C115&quality=75&ssl=1 "Curbside Recycling: 1985 Oldsmobile Firenza S Coupe – A 1970 4-4-2 It Is Not")
Curbside Recycling: 1985 Oldsmobile Firenza S Coupe – A 1970 4-4-2 It Is Not
Posted on January 4, 2024 | 54 CommentsLord, won’t you buy me an Oldsmobile sang no one ever, certainly not Janis, and not any of the legions of artists since. Yet here we were in the times […] -
![(first posted 9/6/2013. For those that didn’t make the jump to Part 2 the other day) In 1980 my father’s autobiography was published under the title “An Addiction to Automobiles”. […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2013/09/Platt-book.jpg?resize=115%2C115&quality=75&ssl=1 "The Corporation: The Story Of My Father, A GM Executive Part 2 – From Churchill Tanks To Body Rot")
The Corporation: The Story Of My Father, A GM Executive Part 2 – From Churchill Tanks To Body Rot
Posted on November 15, 2023 | 98 Comments(first posted 9/6/2013. For those that didn’t make the jump to Part 2 the other day) In 1980 my father’s autobiography was published under the title “An Addiction to Automobiles”. […] -
![(first posted 6/9/2014) A running joke in the comment threads mocks the strain of enthusiasm for the mythical object of today’s four-wheel lust: the brown, turbo diesel, manually-shifted station wagon. Could this […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2014/06/pontiac-safari1.jpg?resize=115%2C115&quality=75&ssl=1 "Cohort Classic: 1970 Pontiac Executive Safari – Our Kind Of Brown Station Wagon")
Cohort Classic: 1970 Pontiac Executive Safari – Our Kind Of Brown Station Wagon
Posted on November 8, 2023 | 54 Comments(first posted 6/9/2014) A running joke in the comment threads mocks the strain of enthusiasm for the mythical object of today’s four-wheel lust: the brown, turbo diesel, manually-shifted station wagon. Could this […] -
![GM might as well be the abbreviation for Genius Marketers instead of General Motors. How else to explain over TWO MILLION suckers that purchased a Vega? And it’s not like […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2023/06/IMG_7470.jpg?resize=115%2C115&quality=75&ssl=1 "Curbside Recycling: 1973 Chevrolet Vega Kammback – Oy Vega! 50+ Years Of Long(roof) Memories")
Curbside Recycling: 1973 Chevrolet Vega Kammback – Oy Vega! 50+ Years Of Long(roof) Memories
Posted on June 21, 2023 | 58 CommentsGM might as well be the abbreviation for Genius Marketers instead of General Motors. How else to explain over TWO MILLION suckers that purchased a Vega? And it’s not like […] -
![(first posted 3/27/2017) For so many years, 1959 seemed like such a normal year. Moreso for me than for others perhaps, because that was my birth year. I have been […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2017/03/1959PontiacCatalina09.jpg?resize=115%2C115&quality=75&ssl=1 "Curbside Classic: 1959 Pontiac Catalina Sport Coupe – Lessons In Aging")
Curbside Classic: 1959 Pontiac Catalina Sport Coupe – Lessons In Aging
Posted on March 27, 2023 | 74 Comments(first posted 3/27/2017) For so many years, 1959 seemed like such a normal year. Moreso for me than for others perhaps, because that was my birth year. I have been […] -
![The robbers had somehow entered the house. How did dad and mom never heard them is beyond me, but it was now up to me to find a way to […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2023/03/IMG_20221029_163521567_HDR.jpg?resize=115%2C115&quality=75&ssl=1 "Streetside Classic: 1974 “El Cherito” – GM’s BTV ‘Dreams’ Project")
Streetside Classic: 1974 “El Cherito” – GM’s BTV ‘Dreams’ Project
Posted on March 3, 2023 | 13 CommentsThe robbers had somehow entered the house. How did dad and mom never heard them is beyond me, but it was now up to me to find a way to […] -
![(originally posted 1/19/2012. Updated 12/21/2022 with information from “The Cadillac Frame – A New design Concept For Lower Cars” a paper submitted to the SAE by GM engineers that was […]](https://i0.wp.com/www.curbsideclassic.com/wp-content/uploads/2012/01/X-Frame-61-Buick-a.png?resize=115%2C115&quality=80&ssl=1 "Automotive History: An X-Ray Look At GM’s X-Frame (1957-1970) – Xing Out Some Myths")
Automotive History: An X-Ray Look At GM’s X-Frame (1957-1970) – Xing Out Some Myths
Posted on December 22, 2022 | 211 Comments(originally posted 1/19/2012. Updated 12/21/2022 with information from “The Cadillac Frame – A New design Concept For Lower Cars” a paper submitted to the SAE by GM engineers that was […]
