Hooniverse Asks- What's GM's Greatest All-Time Shared Platform?

By Robert Emslie Aug 7, 2013

GMs

Whether hand-me-down clothes or communal toys, families do a lot of sharing. The bigger the family the more sharing goes on, and over the years there have been few automotive families bigger than that of General Motors. Today there are some members who have passed away, and others who don’t get cards at the holidays, but there’s still a lot of names at the table. And, while they all have their own personalities and needs, they do frequently share a lot of what goes on under their skirts.

Last week I asked if you thought the Ford’s Fox body represented that company’s greatest serving platform design. This week I’d like you to take a stab at the General, although not literally, after all we’re all friends here. Over the years and decades perhaps no other auto maker has been so generous in sharing among its offspring and certain models are better known by their platform codes – A-bodies, F-cars, etc, than their individual models.

What I want to know is, which of those is the code for greatness? Which multi-brand GM platform do you think is the company’s all-time best?

Image source: Pontiac Registry

52 thoughts on “Hooniverse Asks- What's GM's Greatest All-Time Shared Platform?”
  1. My favorite is probably the A-Body/G-Body of 1978-1988. It includes the Buick Grand National/GNX, the El Camino and assorted 2 door, 4 door, and wagon versions of Chevys, Olds, Buicks, and Pontiacs.
    <img src="http://upload.wikimedia.org/wikipedia/commons/thumb/0/07/1987_Buick_Grand_National.jpg/800px-1987_Buick_Grand_National.jpg"width=500&gt;
    A close second is the GMT360 which includes the following: Chevrolet Trailblazer, GMC Envoy, Buick Rainier, Oldsmobile Bravado, Isuzu Ascender, Chevrolet SSR, and Saab 9-7X.
    <img src="http://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/2006_Saab_9-7X_blue.jpg/800px-2006_Saab_9-7X_blue.jpg"width=500&gt;

      1. The Aztek was derived from the GM U-Body, which got around as well – in addition to starting off as the Venture/Trans Sport-Montana/Silhouette, they spun it into the Aztek/Rendezvous and then rebodied the vans as the Uplander/Montana SV6/Terraza/Relay.
        They were just never great.

          1. Yep, that's why the original Aztek concept, while still being very far from pretty, looks so much better than the production version. The Aztek gained a bunch of upright ungainliness when they stretched the concept design to fit over the minivan mechanicals.

          2. Not the Dustbuster 1st-generation vans. Those were derived from FWD A-body cars, which were stretched FWD X-bodies.
            There's no Citation heritage in the Aztek. They are derived from the 2nd-generation U-body vans, which were a clean-sheet redesign.

  2. <img src="http://i257.photobucket.com/albums/hh214/diecastcarsusa/003-23.jpg&quot; width=500 /img>
    It's a shared platform (if just barely), and it's pretty easy to say it's one of GM's greatest.
    If not, I'm going with the T-Cars, as GM got a hell of a lot of use out of it, both in breadth of applications, and how long they kept using it. And, unlike the J-Body that ran somewhat simultaneously, it's RWD and has certain models that are already getting some appreciation as classic.

      1. No kidding! Among the most fun I've ever had in a car was headed out in a decrepit, underpowered, slushbox'd Chevette on a snowy night, and holding a lengthy slide at slightly over walking speed.

      1. I don't think the FWD T-bodies were related to the RWD T-bodies in anything but name. Just like a 1970 Buick Skylark and a 1985 Buick Century are both A-bodies. Nothing shared but a name in the platform.

  3. The most successful is probably the A-Body platforms (Four iterations between 64-81) and G-Body. Most of the iconic cars from that time are on those platforms. They also tended to be the best selling cars in their time.
    Some of my favorite cars are on these platforms.
    65 Mailbu, 66 Skylark GS, 69 GTO, 73 Grand Am, 76 Cutlass, 87 Pontiac 2+2, 88 GNx. All of them were great, in their time.

  4. It depends on what you mean by great.
    From the company's POV, the RWD T-platform was probably the best leveraged. It ended up as the basis for an amazing number of permutations around the world, and since they were all basic models, tallied up a crapload of sales for GM.
    <img src="http://home.comcast.net/~eapoole//pwpimages/.__448_299_Opel-Kadett-1-6-Aero.jpg&quot; width="320">
    <img src="http://dkarros.com/es/images/stories/1980/1982_chevrolet-chevette-brasil.jpg&quot; width="320">
    <img src="http://farm5.staticflickr.com/4003/4432957525_70bbaa94db.jpg&quot; width="320">
    For drivers, the most functionally excellent would probably be the current Zeta platform.
    <img src="http://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/2014_Chevrolet_SS_front.png/320px-2014_Chevrolet_SS_front.png"&gt;

    1. And its predecessors based originally on the various Opel Commodores/Rekords
      <img src="https://upload.wikimedia.org/wikipedia/commons/e/ef/Opel_Rekord_D_1975.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/c/c5/Opel_Commodore_vr_orange_TCE.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/45/Vauxhall_Viceroy_reg_Aug_1982_2490_cc.JPG/800px-Vauxhall_Viceroy_reg_Aug_1982_2490_cc.JPG"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/6/64/1990-1991_Holden_VN_Calais_sedan_08.jpg/800px-1990-1991_Holden_VN_Calais_sedan_08.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/1989-1991_Toyota_Lexcen_%28VN%29_GLX_sedan_01.jpg/800px-1989-1991_Toyota_Lexcen_%28VN%29_GLX_sedan_01.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/ca/1994-1995_Holden_VR_II_Berlina_sedan_03.jpg/800px-1994-1995_Holden_VR_II_Berlina_sedan_03.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/1996-1998_Holden_VS_II_Commodore_S_utility_03.jpg/800px-1996-1998_Holden_VS_II_Commodore_S_utility_03.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/1997-1999_Holden_VT_Commodore_Acclaim_sedan_05.jpg/800px-1997-1999_Holden_VT_Commodore_Acclaim_sedan_05.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/46/2004-2007_Holden_VZ_Commodore_Executive_station_wagon_04.jpg/800px-2004-2007_Holden_VZ_Commodore_Executive_station_wagon_04.jpg
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/5/52/2008-2009_Holden_VE_Commodore_Omega_Sportwagon_03.jpg/800px-2008-2009_Holden_VE_Commodore_Omega_Sportwagon_03.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/d/d3/2000-2001_Chevrolet_Lumina_SS_01.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/2004-2005_Holden_VZ_Monaro_CV8_coupe_01.jpg/800px-2004-2005_Holden_VZ_Monaro_CV8_coupe_01.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/TEN_News_Adventura-02.jpg/800px-TEN_News_Adventura-02.jpg"width="600"&gt;
      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Hsv_avalanche_rear.jpg/800px-Hsv_avalanche_rear.jpg"width="600"&gt;
      <img src="https://media.gm.com/content/media.suffiximg.w_550.maxw_550.maxh_367.jpg/content/dam/Media/images/ZA/Vehicles/Chevrolet/Lumina_UTE/2011/IG_luminaute_ZA_02.jpg/1309765907901.jpg"width="600"&gt;
      <img src="http://3.bp.blogspot.com/-wCygtamKZ2k/TaVZE7PWDII/AAAAAAAAEdo/GUhh5e-hVqU/s1600/Frontal_Lateral_Buick_Royaum_09_1.jpg"width="600"&gt;
      <img src="http://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Buick_Park_Avenue_China_2012-05-27.JPG/800px-Buick_Park_Avenue_China_2012-05-27.JPG"width="600"&gt;
      etc,etc.

  5. Agree with Tanshanomi on what the definition of "is" is. I think that GM got the most mileage out of the W platform – starting with the '88 Grand Prix and finally, finally, on it's last gasp of air with the current (2013) Impalas. That's 25 years of mediocrity!

    1. I always thought from '91, I think it was, on, they were the D-body, but yeah, the B-bodies…amazing amount of creativity went into marketing those.
      Chebby/Pontiac/Olds/Buick/Cadillac…for a long time, could all use the same doors.
      FWIW, I will never NOT want a '95 Fleetwood Brougham. That engine bay could easily fit a crate 572. Keep it bone-stock looking, though, and go trollin'.
      I need more gray hair to pull it off, though.

    1. When I graduated from high school, I was looking for a 'new' car to buy, and happened upon an champange-colored E-body Eldorado for sale well within my budget and mostly rust free. I almost bought it, but I decided against it after watching the gas gauge needle drop way faster than I thought possible during the test drive.

      1. There used to be one of those parked in someone's front 'yard' in the mountains west of Denver.
        Always wanted to rescue it, though I know it'd be a PCH of epic proportions.

    2. These are really the high water mark for creating cars that looked and felt quite distinct while sharing a lot under the skin. What's especially remarkable is that while the Olds and Cadillac are very similar in drivetrain and suspension (each has its division's own big V-8, but the same transmission, the same basic suspension and subframe, etc.), the Buick definitely wasn't — the Riviera had RWD, a conventional TH400, a different suspension, and a separate cruciform frame rather than unitized construction!

  6. Opel Vectra, because they got both the Caddy Catera and the SAAB 9-5 out of it. But maybe I'm really making the case for the Trailblazer here.

    1. Wasn't the Vectra responsible for the SAAB, while the Catera was derived from the Omega? Although, considering the Omega and Holden Commodore were also related, that's not a bad choice either.

  7. While I'd love to say they F-body is the best. I mean really they were powered by everything. Chevy, Pontiac, Olds and Buick engines made it into their engine bays.
    I think I'd actually have to go with the A-body though. Super Sports, GTOs, W-30's, GSXs. Convertibles, two door hardtops, posts, 4 doors, station wagons, Vista Cruisers, trucks. Tiny little I-6's backed by slush boxes, and 455's backed by 4 speeds. A-bodies are some of the fastest and slowest, luxurious and utilitarian cars GM has ever made.

  8. The B-body is the obvious answer, but one that's really good and also underappreciated is the 1985-2011 fullsize FWD platform, which used letters C, E, G, H, K, V, and probably even more.
    For their era, the chassis was excellent–it was very stiff and the independent suspension offered handling that ranged from OK to excellent depending on what spring package you ordered. For their size and stiffness, many of them were lightweight because of extensive use of aluminum and, in some cases, fiberglass. Even in its last years, I don't think the harshest of critics felt that the chassis was uncompetitive (but GM's resistance to using modern engines and 6-speed transmissions in the cars sure was).
    The interiors were more spacious than other larger cars and seats were comfortable. I think you'd have to look at old Citroëns to find any FWD car nearly as comfortable. I can't think of any car more likely to make a 14-hour drive painless.

      1. We rented a DHS on an emergency trip to central Texas.
        Really, really liked the car, but I have an obvious weakness for luxobarges.
        Test drove a DTS a few years later…my wife said it didn't look 'right'. I was 35, or so, at the time.
        She does like the 2005 STS with me in it, though.

  9. Early Y-body. Tempest, Corvair, F-85, Jetfire, Cutlass
    Unibody, 4 wheel independent suspension, rear transaxle (or engine), Aluminum motors, Turbo V8s, half-a-V8 slant 4 cylinders…seems more like 70s-80s BMW or Audi than GM.
    There's no shortage of awesome-but-not-quite-how-we-hoped to any of those features, but I'd love to build a "what could've been" version that captures the best of all the variants and adds a layer of engineering fixes.

  10. I have to vote A-body 68-72. Not only did it have all US/Canadian GM variations, but it lived well into the late seventies in various Holdens (commodore, manaro, ute…) and I think Opels as well.

  11. How about the 1973-1991 GM C/K truck platform? Chevrolet and GMC versions of pickups, Blazers, Suburbans, and closely related to the 1971-1996 G-series vans.
    <img src="http://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Chevrolet_K5_Blazer_–_09-07-2009.jpg/800px-Chevrolet_K5_Blazer_–_09-07-2009.jpg"width=500&gt;
    These are some of my all time favorite trucks. I grew up with them. Dad had a orange and woodgrain C-10 for a while, we had papaw's tan and white Cheyenne C-10 for many years, it was my first "car". I drove a 1979 K-5 Blazer from 1992 until about 2002. I had a jacked up K-10 for about a year. I pretty much learned how to work on cars with these things. Simple and rugged (but early ones were poorly rust-proofed).

    1. Definitely an iconic truck design. None of the successive trucks have been able to pull off the squared fenders quite as well.
      The vans are a totally different platform, though. GM dipped into the C/K parts bin for parts like control arms and brake calipers, but the vans were a separately-concieved unibody design. A similar relationship existed for Dodge B-vans and D/W-series trucks. When GM went to BOF construction for vans in 1997, they were again a unique platform that used some parts from the GMT400 trucks of the day.

  12. Also, like most similar pickups of the era, these are the automotive equivalent of the cockroach because there was like a billion of them made and they refuse to die. As long as there's oil to be had, there will be a C/K somewhere happily chugging along.

  13. How has no one mentioned the Cavalier/Sunfire J platform… Grand Am/Alero/Malibu N body close second (obviously I'm not being serious)

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