BF Auction: 1977 GMC Sierra C15

Bid to: $5,600View Result

  • Seller: Blaine R ichards (Contact)
  • Location: Farr West, Utah
  • Mileage: 78,453 Shown
  • Chassis #: TCL447J501514
  • Title Status: Clean
  • Engine: 350 4-Barrel V8
  • Transmission: Automatic

The classic truck market is unique! While we all love a classic vehicle, trucks have the added benefit of being more functional. There’s nothing stopping you from running to the store in your vintage Mustang or Tri-Five Chevy, but you probably aren’t going to haul lumber in it or take it to a construction site. A classic truck, on the other hand, well, you can pamper it like a showpiece, or you can put it to work. This 1977 GMC C15 is a clean driver that’s nice enough to take to car shows, but not so nice that you’d feel bad running to the lumber yard in it, making it the perfect find for someone who wants a classic with utility. It’s being offered here as a Barn Finds Auction and is located in Farr West, Utah.

The C/K Series was General Motors’ bread and butter truck for 40 years. This example is from the third generation of C/K series, which is often called the square body. Being a Sierra C-15 means this one is well optioned with the heavy-duty suspension, 350 V8, auxiliary fuel tank, and power steering. It seems pretty plain Jane by today’s standards, but this would have been a luxurious truck when new. As great as modern luxuries are, there is something appealing about not having touch screens everywhere in your truck.

The inside presents just as nicely as the outside, with only some minor blemishes. It’s possible that the seat upholstery and vinyl floor coverings have been replaced at some point in its past, but they looks like they could possibly be original. Either way, what’s really important is that it presents nicely and is ready to enjoy. The dash looks to be free of cracks, and the door panels are free of damage or excessive wear. There’s an aftermarket stereo installed, but the dash looks original otherwise.

Several engines were offered for ’77. This one received the 165-horsepower 350 V8. While not the most powerful option, you really can’t complain about a good old 350. It’s in good running order and sends its power to a TH350 automatic and a 3.4-ratio rear end.

Clearly, this truck has been well cared for from day one. The paint appears to have been touched up at some point, but overall it presents nicely. Some surface corrosion is showing underneath as well as some bubbling on the passenger’s side door, but overall, it looks solid. The seller had one of our professional photographers take the pictures of it, so be sure to take a closer look at the gallery below!

Bid On This Auction

High Bid: $5,600 (Reserve Not Met)
Ended: Jun 27, 2025 1:00pm 1:00pm MDT
High Bidder: JohnP
  • JohnP bid $5,600.00  2025-06-27 12:54:37
  • RockMoto bid $5,500.00  2025-06-27 08:17:54
  • Dano bid $4,500.00  2025-06-27 06:57:52
  • RockMoto bid $4,000.00  2025-06-27 06:24:27
  • Dano bid $3,400.00  2025-06-26 15:15:04
  • David bid $3,300.00  2025-06-24 13:09:35
  • RockMoto bid $3,200.00  2025-06-24 12:02:39
  • David bid $2,700.00  2025-06-24 10:43:18
  • RockMoto bid $2,600.00  2025-06-24 09:00:48
  • Escargot42 bid $2,000.00  2025-06-23 17:15:23
  • RockMoto bid $1,600.00  2025-06-22 09:57:21
  • David bid $500.00  2025-06-21 13:23:01

Auctions Ending Soon

Comments

  1. Dirtymax

    No a/c on this one, but still a good looking work horse

    Like 12
    • Jim Randall

      Nice thing about these old square bodies is you can ride with the windows down and carry on a conversation, not like the new trucks which are like riding in a helicopter!

      Like 18
      • BCB42

        Really interesting that I hadn’t noticed that… but yea… I can remember singing along to Willie N’s ‘Blue Skies’ drivin’ home at 60 plus from my shift at the pool high summer, and hearing myself…
        You crack a window in my 2020 F250 and fugaboutit…. nothing but wind roar…

        Like 4
    • James Duckett

      I wonder why so many comments including yours is showing an April 15 date??

      Like 0
      • Jesse Mortensen Jesse MortensenStaff

        It was relisted.

        Like 1
  2. Jerry

    I used to own a similar one, but in blue. No air for me, I was just fine. Trucks are for work, why have so many forgotten that? I also wonder why so many seem to need four wheel drive? Very rarely if ever needed, yet today I see almost exclusive 4X4s in suburbia. Huge, wasteful, poor handling things. If most of America drove Civics or Corollas, we would be so much better off, plus so would Mother Earth. Lets leave the 100K gas guzzling behemoths to workmen where they rightly belong. (Oh yes, and two doors only! New four door trucks either have useless short beds, or regular sized ones and the things are longer then a semi. Hard to park, Hard to park around, hard to see around.)

    Like 17
    • Jim Randall

      I love the new little trucks, 4wd sedan with no trunk lid!

      Like 7
    • Mike F.

      Some of us actually need and use 4wd regularly. I pull a horse trailer off the concrete pretty often, also snow and ice here in Colorado require it on occasion. Useful option. When I lived in Alabama I didn’t need it. Guess it’s a question of where you live and how you use your truck.

      Like 12
    • JMC

      What accelerated the sales of those luxury behemoths both trucks and SUVs was the downsizing of the passenger car and the virtual elimination of the station wagon. If someone needs to tow something, you can’t get a new Roadmaster or Caprice Classic. If you regularly need to carry adult sized passengers or more than a couple of kids,your Corolla is an uncomfortable option. The forced downsize from Uncle Sam is directly responsible.

      Like 5
    • Terrry

      I couldn’t have said it better myself!

      Like 0
  3. Spencer D

    My grandfather had one just like this with an equally beautiful paint color – his was mint green. It was the first manual transmission I drove on the roadway (other than an IH tractor). Thanks for the memories. Great truck – I hope it finds a good home.

    Like 8
  4. Howard A Howard AMember

    What? Nah, been there, done that. I liked my GMC, if it had an automatic, I never would have sold it. Dependable as a wash machine, never had to worry if it would go, unlike the Jeep where I hold my breath everytime until it starts. Great trucks, but let me make one thing clear on these. These still have inherent flaws common to most older trucks. Handling, braking, driving, especially in the cold, just not the modern sedans with a pickup box of today you may be used to. This is a great find, and I can’t help but think of all those farms you pass, got to be many of these still parked in a corner somewhere. Sales numbers are sketchy, but some say over a million were sold in its 1st year. You can’t go wrong here.

    Like 11
    • Terrry

      Howard when was the last time you saw a windshield tinted like that? I don’t think that’s the truck’s original glass. I like it though!

      Like 0
      • Crown

        That tint looks a little extreme. The ’78 Big Ten we had, had that tint strip across the top. I had a ’99 Ram that came from the factory with that tint strip also.
        All the vehicles I bought after that Ram…none of them offered it.

        Like 0
  5. Troy

    The beauty of the older trucks like this you can put a stack of 4X8 sheets of plywood in the bed and shut the gate leaving room on both sides for 2x4s or other things.

    Like 15
  6. nlpnt

    My dad had a ’79, fewer options than this. His was a 6 and 3 on the tree, no two tone, only options were the long bed, AM radio and painted step bumper. Reliable, yes, but rusted like it’s an Olympic sport. It was our family car until Mom got cataract surgery and her license back, and for a year or so after. When she got her own car, a Plymouth Horizon, she drove it like it was a Lotus.

    Like 8
  7. John Michael

    You guys take the best shots, looking at them is the next best thing to being there, and for me it’s actually better because I don’t have to get on my hands and knees. This is a neat truck I think.. something I’d like to own if I had a place out of town on acreage.

    Like 7
  8. Mark

    Nice unmolested original Chevy truck from the 1970s with no modifications. Stock as can be. Price is right hope it finds a good home. Good for a second vehicle, and better than the newer trucks that have too many gadgets on them!!

    Like 9
  9. Stan StanMember

    Just ideal honest work trucks. Provided a pleasent 😎 driving experience when unloaded I bet… 350, Hydramatic, well geared differential. I remember riding in the bed of many family’s 2wd pickups as a kid. What a blast. 👍

    Like 6
  10. Driveinstile DriveinstileMember

    This truck brings back a lot of memories. The sound the door made when you open and close it. When they were new the smell of the vinyl seat and vinyl floor. The sound of the SM 465 4 speed running through the gears. My Dad had a few of these “square body” generation Chevrolets and one GMC. All good trucks, other than the ’73 and ’77 rusting after just a few short years. Its nice to see one this vintage and in such great shape. Even the seat looks terrific.

    Like 6
    • BCB42

      I smelled my old High School, looking at these pics…
      *btw it (my HS) was used for Friday Night Lights… the locker room and field at least.

      Like 3
    • Terrry

      They always tended to rust at the top of the wheel wells and the rocker boxes. I had a ’75 SWB with a six and 3-speed. Nice little truck but it had terminal cancer.

      Like 2
  11. Nelson C

    Lovely old GMC. Remember when these used to be everywhere. Base trim with white roof, bumper and hub caps. Printed vinyl seat and the rest of the interior looks like it was never in the sun. Open the wings and vents and enjoy the errands.

    Like 4
  12. Wademo

    How in the **** is a ’77 3/4 ton pickup in this condition? Looks like it may have been used long enough to have the stock e xhaust replaced with a dual glass pack system and then put in storage. Extremely well kept! I prefer Fords from this era, but i would love to have this truck.

    Like 2
    • Dan

      The 15 was a half ton, the 25 was the 3/4ton.

      Like 3
      • Wademo

        Right. I must have been drinking.

        Like 1
    • Jim

      If you look, there is yellow overspray underneath. It’s had some work done to it.

      Like 2
      • RG Lewis

        You are correct. Left front fender is a reproduction as the terrible fit at the windshield pillar is very noticeable and the hood has been replaced.
        GM never sprayed the underside of the hoods in this manner and one of the “over spray” underneath pictures shows the inside of the lower front fender unpainted. The truck’s been in an accident and it would be helpful to know how bad. Carfax?
        Otherwise it is very clean and sharp for its’ age.

        Like 0
      • Crown

        The fit of the right one in the same spot isn’t much better either.

        Like 0
  13. SM

    Sierra was the base trim. PB & PS were options (mine had PB but no PS).

    Like 2
  14. Jim Randall

    This is the third time around, how high is the reserve???

    Like 4
  15. JMC

    There’s a soft spot in my heart for this. At age 19,my Dad cosigned for my new black ’77 2wd similar to this. It was rated at 6,050 lbs, that carried the emissions to a point where it didn’t have the catalytic converter whereas the base ones did,so the cheaper regular leaded gas worked for it. 8 ft box,350,4 speed with the granny gear..I drove that thing into the 1990s which had that truck pretty much rusted to pieces,it was still running when I gave it up.

    Like 3
  16. Terrry

    Built when a half ton was a truck, not an overstuffed four door family-hauler. This might actually be a “Heavy Half”, a haIf ton with three-quarter suspension. A light three quarter? If this unit isn’t badly rusted in spots where they’re known to rust, it’ll be a good truck for someone including me if I was in the market for one..

    Like 1
  17. Jim

    Looks like it’s been powerwashed and there’s some yellow overspray underneath. That said, it’s a cool truck. I’ve owned a 1976 C35, a 1975 C10, and a 1984 K10. The C35 was a single-wheel camper special with dual tanks. It needed them. Very uncomplicated trucks that did work, unlike some today. The C35 could carry more than its empty weight. No broken chassis either. The only disappointment was the K10. It had a 700R4, and the 305 went south. A crate 350 and a TH350 fixed that. I had the rear springs done on the C10, and that could carry 3000lbs in the bed without an issue. No broken chassis there either.

    Like 4
  18. Jon Rukavina

    Searching my memory, I think there was a decal at the rear of the box that said “heavy half”. Don’t see that here unless the box was resprayed, a possibility looking at the cargo area.
    My Dad bought a ’78 Chev. ” Big 10″ Scottsdale with decal on the box. Don’t remember if it was a 305 or 350, but it seemed like the fuel line was a shop vacuum hose! Great looking 2-tone green with chrome bumpers and full spoke-looking wheel covers.
    This GMC looks fantastic in & out.
    If I had this, I’d try to find the a/c dash & gauge area trim pieces and add it in.
    Those minor chips aren’t a big deal. In the days before protective film, we all remember the aluminum shields you could buy to protect the flare-out fronts of the rear wheel openings. Owner tried up front with the Deflecta Shield.
    Basic model with the rubber mat. Upscale to Sierra Classic and Sierra Grande. Then there was Gentleman Jim.
    One of the nicest examples on BF.

    Like 2
    • Crown

      The “Heavy Half” and “Big Ten” (Chevy) were stepped up weight ratings to get past the emission testing. The OEM tailpipe had a screen in it so the emissions sniffer couldn’t be shoved up the tail pipe.
      The seat would be original as we had a ’78 Big Ten in our family. Two tone mint green with white mid-panel and that seat pattern is the same except a different color since the interior is tan on this GMC.
      Hardly any options on this one. Can’t remember what the loaded GMC was called. The loaded Chevy was the Silverado.

      Like 2
      • Terrry

        The Heavy Half and Big Ten had beefier springs and larger tires. That was about it. It was marketed as “bigger than a half ton ” to get around EPA regs at the time such as unleaded only, etc. etc. The engine wasn’t as smogged either. It was basically a 3/4 that wasn’t.

        Like 0
      • Crown

        @Terry. Definitely not 3/4 ton suspension. Job I worked at, my boss had bought a 3/4 ton, another co-worker bought the Big Ten and the Big Ten was not even close to that 3/4.

        Like 0
  19. DavidMember

    Age of tires? I am bidding on this one.

    Like 2
    • Jesse Mortensen Jesse MortensenStaff

      Looks like 2022.

      Like 0
  20. JD and Isa

    What? No driving video??

    Like 0
    • Jesse Mortensen Jesse MortensenStaff

      The seller isn’t very tech savvy so sending a photographer was the best we could do.

      Like 0

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