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Pmcb

Junior Member
Joined
Nov 24, 2023
Posts
27
Reaction score
30
Location
Spearfish SD
First Name
Pat
Truck Year
1987
Truck Model
GMC Sierra Classic 1500
Engine Size
5.7
Helle, I’m new to this forum, just purchased a 1987 GNMC Sierra Classic 1500. It has been barn stored for the past 10 years. No rust, body and paint in very good condition. 5.7l, 51,000 miles.
This will be my daily driver (4 miles a day 1/2 gravel).
Issues I will be addressing right away: Does not cold start well, once running it does run great. Only One of the two fuel tanks working, looks like it has been than way for some time. There is old sticker on switch saying only use right tank. I have run premium with SEAFoam in tank, sprayed TBI with cleaner, and changed the IAC Valve. It runs smoother now, starts a little better but surges until warm. I plan to work on fuel system first, and some miner interior fixes. Drives straight but some grabbing of brakes. Will check those tomorrow, plan on rotor and disks.
I need lots of help with electronics and sensor.

My last driver was mint condition 1991 Jeep Comanche that was hit and totaled. Before that I have rebuilt 1972 Triumph Spitfire, 1931 Ford A (used daily for year). And I have started long term build of 1915 Ford T truck that will be hybrid diesel/Electric With motorcycle disk brakes on wood wheels.
 

FireTruck1984

Full Access Member
Joined
Jan 7, 2019
Posts
2,775
Reaction score
8,835
Location
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… Is your GMC Sierra Classic a C1500 or a V1500 ?
 

Memaloose

Full Access Member
Joined
Dec 2, 2018
Posts
468
Reaction score
1,201
Location
Dolan Springs, AZ
First Name
Tony
Truck Year
1975
Truck Model
K20
Engine Size
350
Welcome from AZ!

Take it out on a highway run for a couple hundred miles to get everything working smooth again. I may be all it needs. 51,000 miles is hardly broken in.
 

Pmcb

Junior Member
Joined
Nov 24, 2023
Posts
27
Reaction score
30
Location
Spearfish SD
First Name
Pat
Truck Year
1987
Truck Model
GMC Sierra Classic 1500
Engine Size
5.7
Thank you all, it is a v1500, but not sure what the difference would be?
I will get some pictures tomorrow, it’s already covered with dirt from our gravel roads, but most likely will always be.
 

animal

Super Moderator
Staff member
Super Moderator
Joined
Jul 30, 2010
Posts
5,350
Reaction score
3,410
Location
Georgia
First Name
Lee
Truck Year
1986
Truck Model
c10 silverado
Engine Size
350ish
:welcome:
 

mtbadbob

Full Access Member
Joined
May 9, 2021
Posts
508
Reaction score
656
Location
Montana
First Name
Bob
Truck Year
1987
Truck Model
V20
Engine Size
350
Thank you all, it is a v1500, but not sure what the difference would be?
I will get some pictures tomorrow, it’s already covered with dirt from our gravel roads, but most likely will always be.
Welcome from Montana! The V designation is for the last year of that body style in that series, 10 or 20. Coolant temp sensor plays a big part in good cold start-ups, so that may be a place to look also.
 

ali_c20

Full Access Member
Joined
Sep 20, 2016
Posts
929
Reaction score
1,224
Location
Austria
First Name
Alexander
Truck Year
1974, 1979
Truck Model
C20, K5
Engine Size
350, 350
Welcome from Austria. Pics, we want pics!
 

Terry Wilkerson

Full Access Member
Joined
Dec 2, 2021
Posts
407
Reaction score
551
Location
Kansas
First Name
Terry
Truck Year
1986
Truck Model
GMC 1500
Engine Size
350
Welcome from Kansas
 

WFO

Full Access Member
Joined
Jan 6, 2017
Posts
3,315
Reaction score
4,288
Location
Texas Panhandle
First Name
Dan
Truck Year
1986
Truck Model
K20
Engine Size
350
Welcome from the Texas Panhandle.
 

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