383 Stroker Equipped: 1970 GMC Jimmy

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I always thought that “Jimmy” was an unusual name for GMC’s version of Chevrolet’s K5 Blazer. I guess it works better than calling it a “GMC Jim”, though I suppose if it had been offered with a big-block engine, you could call it a “GMC James” but whatever the case, the Jimmy doesn’t appear all that often here on BF. Essentially the same as the K5 Blazer, this first year, 1970 Jimmy 4WD has undergone some modifications but it is a bit of a project too. Located in Hermitage, Tennessee, this early GMC SUV is available, here on eBay for a current bid of $12,100 with the reserve not yet met. Jonny gets the thanks for surfacing this tip!

At a distance, this Jimmy presents well, though, upon closer inspection, the faded finish and some rust are evident. The seller states, “Normal rust in lower quarter panel ( visible in pic), floor, rocker panels, and windshield frame“. I’m not sure what “normal rust” normally consists of, but that’s a lot of places! The red finish appears to be a clearcoat over base, with the clear coat peeling, and the seller tells us that this is a respray from the original code 506 Dark Olive hue. There are images of the underside included in the listing and the inner rockers are where the rust has manifested itself. Beyond that, there is a bit of scale on the frame rails and suspension components but no integrity issues are apparent. Completing the exterior picture are aluminum wheels of unknown origin.

This Jimmy is, unfortunately, a non-runner. It is in possession of a 383 CI “Stroker” V8 but whether it was built from the original 255 gross HP 350 CI motor is not disclosed. And my guess is no, as this engine appears to be a pre-1969 “short-pump” version. The seller adds, “Not running/driving due to lost interest in project. True mileage is unknown“. Clearly, a visual will tell part of the story as the radiator, fan, cooling hoses, etc. are missing. A Turbo-Hydramatic automatic transmission makes the transfer case connection to both the front and rear axles.

The interior could use some attention too. The carpet, which is badly faded, is torn right along with the black vinyl bucket seat upholstery. The dash and instrument panel look OK and nothing there seems to be amiss. This is an A/C equipped truck but the compressor is missing and what remains, i.e. the evaporator, condenser, and expansion valve, looks like they have been disconnected for a long time. Of note, and not mentioned, is the installed roll bar.

These, and the similar Chevrolet K5 Blazer, are popular with both collectors and drivers. So far, just four bids from four bidders have been tendered but if the reserve is reasonable, this one shouldn’t have a problem finding a new home. At least that’s my guess, what’s yours?

Auctions Ending Soon

Comments

  1. Rw

    Brother had one 6 cyl 3 on tree,kind remember a bunch of us going to Uncle Ted concert 1978 or 9ish, good time…

    Like 5
    • Gil Davis Tercenio

      I also had a ’70 GMC, straight six and a three-on-the-tree. Mine had brake problems and I sold it, buying an Isuzu Trooper.

      Like 1
  2. Connecticut mark

    Looks like rear axle pushed forward but I could be wrong, sits weird.

    Like 5
    • Steve

      It looks strange to me as well. Looked it up and it is sitting correct.
      Wonder why GM couldn’t have centered the axel in relation to the fender opening.

      Like 2
    • Marshall Belcher

      If there is a reserve than this is not an auction. Are people ashamed to put the price they want.

      Like 1
    • Marshall Belcher

      Suspension rot. Buy one already restored. You would have more in it than it’s worth.plus you wouldn’t have to waits months an thousands to fix it.

      Like 0
  3. CCFisher

    “Jimmy” was common slang for GMC, much like “Jeep” is derived from “GP,” Ford’s designation for the first Jeeps.

    Like 2
    • Samtheman

      Actually it was slang for GM not GMC. Like GP for jeep. 😘

      Like 1
      • Alan Zeutzius

        Wrong. Truckers driving GMC big trucks have called them Jimmys since the 40’s. If Jimmy enveloped all of GM vehicles, why want the Blazer called a Jimmy? Huh?

        Like 1
  4. Martin

    Actually Jimmy referred to the two-stroke Detroit Diesel and not the actual truck. GMC owned Detroit and developed the motor.

    Like 0

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