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  1. 79K15 HIghSierra

    Backing plate replacement?

    Replacing the rear axle (current one is mismatched gear from the front, don’t ask why). The one I got to swap in has pretty crusty backing plates, how hard and what is involved in removing them? Guessing I’ll need to remove the axle shafts?
  2. 79K15 HIghSierra

    New to tbi, no start 87 blazer

    Alright, buddy just got a 87 blazer 350 tbi. Trying to start, we can see the throttle body shooting fuel into the intake, it turns over and will run off starter fluid for a few seconds. Seems to be getting fuel, but we only hear the pump when we Hotwire across the fuel pump relay. New plugs and...
  3. 79K15 HIghSierra

    Leaky sm465

    Wondering if I need a whole re-seal or just get it rebuilt. Leaking right where the bell housing mates to the trans. Shifts fine, drives fine, just gotta keep an eye on the level. How hard is it to do yourself?
  4. 79K15 HIghSierra

    82 burb hood on 79 k15?

    Will it fit? Found a mint burb hood to replace my rusty one but wanna be sure before I buy it. Thanks!
  5. 79K15 HIghSierra

    New leaf springs!

    As is my custom now, before purchasing an item online I’ll drop a thread in here to get insight from all you knowledgeable fellas! It’s that time in the revival of my old ‘79 that I replace the leaf springs. Went back and forth about lifting it etc, for now I’m going to keep it stock. So...
  6. 79K15 HIghSierra

    Factory sunroof on 79 k15

    It looks stock, very stock, but I don’t see it on the build sheet...trying to find weather stripping for it. Did these even come with sunroof??
  7. 79K15 HIghSierra

    Talk me out of this...

    Saw a NV3500 5 speed 4x4 trans come up on Facebook marketplace...for $250. Are these any good? It says it worked fine when taken out. Worth the trouble of swapping out my sm465?
  8. 79K15 HIghSierra

    Prop valve?

    Just did my rear brakes, new shoes and cylinders, but they won’t bleed! A little fluid trickles out but it doesn’t want to build up any pressure. I believe I need to “reset” my prop valve? It had run completely out of fluid in the rear (bad cylinder leaked out) so from what I’ve found, that will...
  9. 79K15 HIghSierra

    Overheating “slightly” and infrequently

    Alright fellas, riddle me this! Got my freshly rebuilt 350 installed, just back from the shop where timing was dialed in and my few rookie mistakes were mended (little things, thankfully). She runs great! Starts right up and idles great even in the cold. Here’s where my issue is. When I get it...
  10. 79K15 HIghSierra

    Flat beds anyone?

    Anybody put flatbed/ute beds on their squares? My bed is a bit rusted out and thinking about it. Wood, metal, a combo of both? Throw up some pics!
  11. 79K15 HIghSierra

    Locating vacuum ball

    Looking for general location of “vacuum ball”? Got a 79 k15 high Sierra, had factory ac but not hooked up. Heater core is in need of replacing so I’m doing that this weekend, but after my engine replacement I found the dampers not working and was told to hook a vacuum line up to the vacuum ball...
  12. 79K15 HIghSierra

    Body panel/door compatibility

    Needing doors for ‘79 as well as some other body parts, and seeing a lot of 81-87 parts trucks in my area. Are doors close to the same dimensions? Found a c30 with mint doors
  13. 79K15 HIghSierra

    My truck runs! Stopping? Eh not so good

    I got my motor running well enough to get my truck on the road! Safety first so I just ambled around the neighborhood and realized my brakes are in need of attention! Got new calipers and pads on the front and went to bleed them...lines clogged! Master cylinder and two front rubber houses are en...
  14. 79K15 HIghSierra

    Right fuel tank?

    Hey there, my 1979 k15 high Sierra is in need of a new fuel tank! Just wanted to ask some wiser minds here before I pull the trigger. Found a tank and sending unit on rockauto, seem really reasonable on price, can’t think of any reason they wouldn’t fit, but never purchased either before and...
  15. 79K15 HIghSierra

    Comprehensive intake and new engine hookups

    Been looking around for some info and all y’all fine folks have been so dang helpful in my quest to revive my 79 k15, I don’t feel as bad being such a noob and asking “dumb” question, as much as I’ve been told there is no such thing! So, freshly rebuilt engine has been bolted in place, intake is...
  16. 79K15 HIghSierra

    Oil filter adapter?

    Running into a slight problem, ordering this oil filter adapter/mount and it’s saying it’s not for 4x4, but I can’t find one specifically for a 4x4. I’ll admit that I cant remember how it was when I took it out, I had removed the filter only and then pulled motor and sent it off, it came back...
  17. 79K15 HIghSierra

    Break in procedure

    Finishing putting together my newly rebuild 350 for my ‘79 K15. Hopefully installing it this weekend. Noob question but it’s better to ask than to not! Proper break in process? I’m talking from first start. I know to prime the oil pump etc, but as far as breaking in the cam etc, what’s the...
  18. 79K15 HIghSierra

    Lifting engine in place with carb studs?

    Sounds fishy I know. Getting ready to drop my newly rebuild 350 into my truck, want to put the intake on before hand. Old man says “take a plate of steel and weld a couple hooks to it, bolt it where your carb goes and use the hoist to attach there!” He claims this will also keep stuff out of the...
  19. 79K15 HIghSierra

    Help putting my engine back together

    Hey all, just got my rebuilt 350 back, and am going to start putting it all back together. First project of this type, excited to get into it! I’ve done a good bit of research and feel confident to reattach all the components (it is currently only the block with heads on it, lacking intake, oil...
  20. 79K15 HIghSierra

    Cab swap?

    Wanting to get a new cab for my 79 k15, mines a bit rusty. Problem is, all I can find used around me are 81-87 cabs. Would that have significant issues with swapping? Thanks! also mine is 4 speed floor shifter so I’m planning on having to make that mod unless I can find a manual trans cab.
  21. 79K15 HIghSierra

    First square body!

    Picked up a ‘79 GMC k15 High Sierra, one owner farm truck with a sm465 3 speed with a granny gear. Needs some love, original 350 is being rebuilt and should be here Monday. Always wanted one and found my dream truck.

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