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Old 09-23-2020, 04:06 PM   #1
warrpath4x4
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1977 GMC Jimmy High Sierra

Picked this up back in February and really have not done much with it, 1977 GMC Jimmy High Sierra with the gold/yellow trim, blue plaid interior, a/c, cruise, roll bar with detachable off-road lights. it has 126,000 original miles, was picked up at an estate auction from the guy I bought it from, he pulled the tank and had it blasted, replaced the fuel lines and pump, changed the diff fluids, changed the tires/wheels (it was already lifted). Right now the plans are to finish cleaning it and more maintenance. It has a 400/TH350/203 with Dana 44 front 12 bolt rear with 3.73's.



















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Old 09-23-2020, 04:08 PM   #2
warrpath4x4
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Re: 1977 GMC Jimmy High Sierra

The battery that came in this thing was SMALL, I am putting a group 31 battery in but it wont fit the original tray, plus the original tray while not rusted clean through... wasnt in the best shape. I am using 1/8" angle iron and some sheet metal to build a new tray.

I made my supporting bracket 90 degrees, then realized the core support is not straight up and down so I had to modify it.





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Old 09-23-2020, 04:11 PM   #3
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Re: 1977 GMC Jimmy High Sierra

This was basically from February until this last weekend.

This thing really hates starters lol

when i got it the starter was hit and miss, we will call this starter #1

starter #2 blew up after a couple cranks. (thought i had a pic) the end housing of the starter broke off.

starter #3 cranked a couple of times then got stuck on the flywheel I am aware the issue was that it was not shimmed correctly but with the nose cones on them its a pain to get the measurements. i was playing with the quantity of shims when it got stuck and i could hear the solenoid buzzing.

starter #4 i wasnt playing around. i got a mini starter without a nose cone, had to shim the starter back from the starters mounting block, then use 4 shims between the starter and the engine block. i have never had to run so many shims or had such an issue installing a starter lol.

BUT it runs again, also changed the transmission filter since the pan gasket was leaking (most bolts were finger tight). The front driveline gave way at some point in the past because the flange of the trans pan is bent, the exhaust is smashed in that area, and it has an aftermarket front driveline from a shop in my hometown.

I also installed a ford solenoid and built all my own cables (dont have a finished pic)

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Old 09-23-2020, 05:15 PM   #4
mrtoni
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Re: 1977 GMC Jimmy High Sierra

I looked for that interior used for two years! Only bought two front highbacks buckets. Missed a bench on eBay. My favorite
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Old 09-23-2020, 05:18 PM   #5
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Re: 1977 GMC Jimmy High Sierra

Quote:
Originally Posted by mrtoni View Post
I looked for that interior used for two years! Only bought two front highbacks buckets. Missed a bench on eBay. My favorite
The passenger seat has a couple holes in it, other than that the seats are in pretty good shape.
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Old 09-24-2020, 08:36 AM   #6
Corts60
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Re: 1977 GMC Jimmy High Sierra

Awesome rig! Love the interior. I dated a girl from Mabton a loooong time ago. There was a junkyard in Sunnyside or maybe Toppenish I think that her Dad and I would go to a lot. It was a goldmine!
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Old 09-24-2020, 10:36 AM   #7
warrpath4x4
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Re: 1977 GMC Jimmy High Sierra

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Originally Posted by Corts60 View Post
Awesome rig! Love the interior. I dated a girl from Mabton a loooong time ago. There was a junkyard in Sunnyside or maybe Toppenish I think that her Dad and I would go to a lot. It was a goldmine!
small world
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Old Yesterday, 02:26 PM   #8
warrpath4x4
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Re: 1977 GMC Jimmy High Sierra

waiting on parts this week,

the shift rod/mechanism is really sloppy and the metal is worn so i am replacing it with a new lever kit.
https://www.summitracing.com/parts/clp-cpt-sl

"Heavy duty" headlight harness from LMC, I ran this on my 72 K5 and it really brightened the headlights.
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