What is this bolt and hole for?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,439
Reaction score
28,345
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
U sure? Both my '78's had the style line on the front of the hood and I know my Suburban is original. I've read before that it started in '78.


I do remember now that my '78 K10 Stepside had a bolt in the cowl at the end of each fender. I remember looking at them and saying "what are these for?" and removing them lol

Going of your first post in this thread, your hood appears to be a replacement.

I didn't buy my '78 new or even know the history of it. But the hood has every last sign of being original to the truck and it has the flat front.
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,439
Reaction score
28,345
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
Here's a close up of the reinforcement plate on my original '78 hood:

You must be registered for see images attach


I also have a known original hood from a '79 Suburban on my '84 C10, it has the plate on it too, which means that '79 Burb had the center peg as well.

And the extra hole for the '77-'80 inside hood release setup can be seen here:
You must be registered for see images attach


(It's the little rectangular hole, it's where the safety catch goes into the hood)
 

78C10BigTen

Full Access Member
Joined
Apr 12, 2017
Posts
15,948
Reaction score
25,339
Location
pennsylvannia
First Name
Ted
Truck Year
1978
Truck Model
C10 BIG TEN
Engine Size
350
Here's a close up of the reinforcement plate on my original '78 hood:

You must be registered for see images attach


I also have a known original hood from a '79 Suburban on my '84 C10, it has the plate on it too, which means that '79 Burb had the center peg as well.

And the extra hole for the '77-'80 inside hood release setup can be seen here:
You must be registered for see images attach


(It's the little rectangular hole, it's where the safety catch goes into the hood)
Mine doesnt have that plate around the hole
 

DoubleDingo

Full Access Member
Joined
Jul 3, 2012
Posts
11,250
Reaction score
17,176
Location
Right where I am
First Name
Bagoomba
Truck Year
1981
Truck Model
81-C20 Silverado Camper Special-TH400-4.10s
Engine Size
Carb'ed Vortec 350
I never knew such an animal existed. Now I need to check under the hood of my 81
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,439
Reaction score
28,345
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
Mine doesnt have that plate around the hole

I never knew such an animal existed. Now I need to check under the hood of my 81

It seems to be a '78-'80 Suburban and K5 thing and not trucks? Since K5's and Suburbans were classified as station wagons, maybe the crash testing regulations were a little more strict?
 

Donald

Full Access Member
Joined
Jun 24, 2018
Posts
75
Reaction score
168
Location
Loris SC.
First Name
Don
Truck Year
1985
Truck Model
GMC 1500
Engine Size
350 / 290
I worker for a Pontiac GMC dealer back in the 70's , the studs at the fenders where for holding the hood in place in a collision . There are round slots in the back of the hood hinges that align with the studs when the hood is closed .
I think idahovette got it right the center is to hold the hood in place also .
Looks like some thing California would come up with .
 

80BrownK10

Full Access Member
Joined
Oct 22, 2019
Posts
1,878
Reaction score
1,247
Location
Greenwood, SC
First Name
Nate
Truck Year
1980
Truck Model
K10
Engine Size
350
I am pretty sure my 1980 doesn't have it either. I will have to look to double check.
 

Shorty81

Baby Boomer
Joined
Mar 19, 2018
Posts
3,101
Reaction score
5,778
Location
North West ohio
First Name
Darren
Truck Year
86
Truck Model
K20
Engine Size
496
Of all my 73-87 trucks I've had, I've never seen these.
 

Goldie Driver

Full Access Member
Joined
Mar 19, 2018
Posts
4,042
Reaction score
6,634
Location
Houston, Texas
First Name
Britt
Truck Year
1980
Truck Model
GMC K1500 Suburban
Engine Size
350
I worker for a Pontiac GMC dealer back in the 70's , the studs at the fenders where for holding the hood in place in a collision . There are round slots in the back of the hood hinges that align with the studs when the hood is closed .
I think idahovette got it right the center is to hold the hood in place also .
Looks like some thing California would come up with .


These bolts ?
You must be registered for see images attach
You must be registered for see images attach


And, the center bolt.

You must be registered for see images attach



The extra hole :
You must be registered for see images attach


From a 80 Burb.

Cannot remember if the 77 had any of those.
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,439
Reaction score
28,345
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
'77 had the ones at the rear of the fenders. I haven't been around the earlier trucks lately, but I think they had them too.

The one in the center is the odd one. So far, it seems to be a '78-'80 K5/Suburban thing.
 

legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
2,506
Reaction score
6,482
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
The 74 GMC cab I bought has the two side ones, the strap is covering the driver's side, but you can barely see the passenger side one.
I saw a 79-80 cab and chassis for sale with the center bolt setup.
You must be registered for see images attach


Sent from my Moto Z (2) using Tapatalk
 

Swims350

Full Access Member
Joined
Jul 30, 2010
Posts
4,352
Reaction score
812
Location
Logan WV
First Name
Chris
Truck Year
1983
Truck Model
K10
Engine Size
none
wow I never saw the one in the middle until I just picked up this new hood today it was from a k5 and it has that round hole and plate....


You must be registered for see images attach


You must be registered for see images
 

78C10BigTen

Full Access Member
Joined
Apr 12, 2017
Posts
15,948
Reaction score
25,339
Location
pennsylvannia
First Name
Ted
Truck Year
1978
Truck Model
C10 BIG TEN
Engine Size
350
These bolts ?
You must be registered for see images attach
You must be registered for see images attach


And, the center bolt.

You must be registered for see images attach



The extra hole :
You must be registered for see images attach


From a 80 Burb.

Cannot remember if the 77 had any of those.
My 78 has the side ones and the rear center hole in the hood but not the extra in the front of the hood
 

Latest posts

Forum statistics

Threads
44,162
Posts
950,638
Members
36,273
Latest member
dannyphx
Top