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  1. Keith Seymore

    What is this

    1982 is a little bit before I joined the driveline development group. My officemate is/was the guy that added all that stuff to the M/L vans. Vehicles with a big interior cavity are more sensitive to vibrations resulting in booming. He was trying to knock down the energy, both air born and...
  2. Keith Seymore

    What is this

    It does look like a tuned damper, probably specific to the diesel powertrain. K
  3. Keith Seymore

    GTO in Gilmore Museum

    The GTO is headed out again this week, to be a part of Flint's Sloan Museum "Cars of the Community" display for a year. K
  4. Keith Seymore

    What is this bracket? Off an '83 6.2

    I'd say it goes on the brake master cylinder for hydroboost applications. The tab supports a clip which retains the hydroboost hoses. K
  5. Keith Seymore

    Newby, 1981 C20 cab on 1980 C10 frame

    The '81 hood hinges and cab cowl are different than the 80 as are the front bumper mounts. It would be easier to keep the cab and front clip from the same generation. You really picked the most unfortunate combination of model years, since they fall on the breakpoint between old and new...
  6. Keith Seymore

    Newby, 1981 C20 cab on 1980 C10 frame

    Could be trouble. A K10 is a "high hump" floor. A C10 could be high or low hump depending on Transmisson: column shift auto or column shift manual are low hump; floor shifted manual is high hump. You might be able to put a low hump cab on a K truck but recognize that's not what the factory...
  7. Keith Seymore

    Suggestion on fixing my powder coated rims

    AI to the rescue once again. K
  8. Keith Seymore

    Suggestion on fixing my powder coated rims

    I did this as well (trailer wheels). K
  9. Keith Seymore

    History related, when did people start lifting Chevy trucks?

    Dammit. K
  10. Keith Seymore

    History related, when did people start lifting Chevy trucks?

    I'd say when they made the first 4wd conversions, NAPA conversions started in the mid 1950's. K
  11. Keith Seymore

    Mounting fender emblems should not cause this much anxiety!

    It's very important for the surface to be clean. We would wipe it with isopropyl alcohol or a similar cleaner degreaser. Second thing is you need a lot of application force - like in the assembly plant the rollers would oilcan the doors (not permanently). K
  12. Keith Seymore

    What have you done to your square lately??

    Hood inner to outer (or a passenger car trunk panel) had a little dollop of some kind of adhesive in specific spots. Those panels came to the plant already assembled, so I don't know what was used but it did stay soft over time. The cab/body shop was fully automated (at Flint Line 1, anyway)...
  13. Keith Seymore

    Mounting fender emblems should not cause this much anxiety!

    Those barrel nuts are what we used for repair in the assembly plant. In particular for the '81 and up plastic emblems. If you had a wrong emblem (say Scottsdale instead of Silverado) they would whack it with a hammer to break it, snap it the rest of the way off, insert the barrel nuts and...
  14. Keith Seymore

    Mounting fender emblems should not cause this much anxiety!

    All of the bright trim and emblems on this vehicle are held on with 3M two sided tape. K
  15. Keith Seymore

    SPID question/special paint

    Wow. Yes -interesting options for a fleet vehicle. Makes me wonder if there are more out there. I'd like to know more about how that color relates to Boeing. Typically you can see the relationship: Forest Green for park system use; Consumers Power had a signature baby blue; all the Grand...
  16. Keith Seymore

    Factory assembly manual

    Since this has come back up - I'd like to take a few minutes and talk about the Assembly Manual. These are not the original design blueprints themselves but certainly descended from the design "layout" drawings. The layouts themselves were huge, like as big as a drafting table, and rolled up...
  17. Keith Seymore

    SPID question/special paint

    I'm intrigued with a couple other options: It has the LR60-15 tires (fat tires, like 8 inches wide) and rally wheels, but 305 cu in engine and highway rear gear. Somebody was interested in looking cool (with special paint and fat tires on a 1/2 ton 2wd shortbed stepper) but not interested in...
  18. Keith Seymore

    SPID question/special paint

    No (that is, no idea on the color). "Sing" would indicate single color (not a two tone). Typically special paint vehicles are noted as "special paint" and the code but there is no decode to the actual color and recipe. For example, on a Pontiac it might say "special paint" but no color is...
  19. Keith Seymore

    Is this a square body?

    With that laid back grille and low windshield angle? That's downright swoopy where I come from. K
  20. Keith Seymore

    Is this a square body?

    I saw the GMT 400s before they came out and didn't like them, so I hurried and ordered an '87 (the red truck). Which is funny because I saw the '81's before they came out and didn't like them and hurried and ordered an '80. My dad teased: "You would have seen the '55 Chevys and not liked 'em...
  21. Keith Seymore

    Is this a square body?

    OBS = GMT400 The GMT400 immediately followed the squares. GMT800 started in 1999 model year. K
  22. Keith Seymore

    Best idea for support for painting truck bed?

    Like this? That works for remove and install but you gotta set it on something once you get it off there. I'm not getting underneath that. K
  23. Keith Seymore

    Best idea for support for painting truck bed?

    Nope. That was almost 20 years ago. Measure where your box bolts are and make the posts match. K
  24. Keith Seymore

    Best idea for support for painting truck bed?

    One week turnaround:
  25. Keith Seymore

    Best idea for support for painting truck bed?

    I made this: the vertical posts line up with the bed bolt holes. Just shoot a lag bolt into the post to secure the box. K

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