Hello from Arkansas.

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greene

Junior Member
Joined
Feb 12, 2022
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Location
arkansas
First Name
jason
Truck Year
1986
Truck Model
c10
Engine Size
5.0
New square body owner. I just picked up a great rust free 1986 Silverado stepside. I’m going to build it with my son and make some memories.
I do need some help decoding the partial vin# stamped into the block. It’s a 3970010 cast 350.
Suffix code is TKB so pretty sure it’s a 1976 LS9
I just can’t find where to decode the partial vin# T7S512747.
Thanks for the help!!
 

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Doppleganger

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Location
OH-MI: Just like it sounds
First Name
Chris
Truck Year
1985
Truck Model
K20
Engine Size
5.7
Great looking truck! Nice find. You're going to love it here. :hat:

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ali_c20

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Location
Austria
First Name
Alexander
Truck Year
1974, 1979
Truck Model
C20, K5
Engine Size
350, 350
Welcome from Austria. Nice truck
 

Powerhouse Ranch

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Location
PA
First Name
Luke
Truck Year
1980 & 1988
Truck Model
C25 & V15
Engine Size
454 & 350
Welcome from Western PA!
 

FireTruck1984

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Michigan
First Name
Ted
Truck Year
1984 and 1984
Truck Model
High Sierra K1500 350. Sierra Classic C1500 305.
Engine Size
350, 305
Welcome from the Motor City
Great looking ‘86 !
BTW both of my ‘84 GMCs are from Arkansas, Rector and Clarkridge
 

Craig 85

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Location
Nashville, TN
First Name
Craig
Truck Year
1985
Truck Model
K30 SRW
Engine Size
454/TH-400/NP205
:welcome:
 

AyWoSch Motors

The Parts Guy
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Location
New Mexico
First Name
Ayden
Truck Year
1986
Truck Model
K1500 Sierra
Engine Size
350ci V8
Welcome from New Mexico.
 

AyWoSch Motors

The Parts Guy
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Location
New Mexico
First Name
Ayden
Truck Year
1986
Truck Model
K1500 Sierra
Engine Size
350ci V8
I believe T7S would say that it came out of a 1977 GMC made in St Louis.
The last 6 numbers are unique to the vehical it came from.
 

WFO

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Location
Texas Panhandle
First Name
Dan
Truck Year
1986
Truck Model
K20
Engine Size
350
Welcome from the Texas Panhandle.
 

animal

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Location
Georgia
First Name
Lee
Truck Year
1986
Truck Model
c10 silverado
Engine Size
350ish
:welcome:
 

Terry Wilkerson

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Location
Kansas
First Name
Terry
Truck Year
1986
Truck Model
GMC 1500
Engine Size
350
Welcome from from KC.
I have a 1986 GMC. It Also has the same engine number on the block. According to the what I found on the internet it goes like this.
1968 thur 1979, 350 or 327 cu.in.
145/375 hp. 2 or 4 bolt main.
Truck or hi pregormance.
I hope that helps.
That a lot of variables but it's a start.
My truck had 305 originally and changed at some point.
 

greene

Junior Member
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Feb 12, 2022
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Location
arkansas
First Name
jason
Truck Year
1986
Truck Model
c10
Engine Size
5.0
Thanks everyone, I’ve already found great stuff on this site!
 

Babs

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Location
Ottawa Valley
First Name
Paul
Truck Year
1976
Truck Model
Chevrolet CUCV
Engine Size
350
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1973c10

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Location
Oregon
First Name
Don
Truck Year
1973
Truck Model
C10
Engine Size
454
Welcome aboard
 

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