1‑800‑243‑8355
Help
Contact Us
Free Shipping
Shipping Information
Manufacturer Rebates
How To Order
Payment Options
Return Policy
FAQs
Emissions Regulations
Gift Card Balance
Sponsorship Opportunities
Company
Request Catalog
OPGI Blog
Hours & Location
History
Frequent Buyer Points
Volume Discounts
Price Match Guarantee
Kit Swap Savings
Reviews
Careers
Clearance Sale
Archives
My Account
My Orders
My Wish List
As seen on
1978
K15/K1500
My Garage
1
View Garage
1978
GMC
K15/K1500
Shop Parts
Filter Search
Shop All Parts
+ Add Vehicle
Catalogs
Cart
Have a Question?
Ask our Experts
Mon‑Fri 8:00‑4:30 PT
Experts Offline
Interior
Door Handles & Hardware
Door & Window Handles, Door Hinges
Emblems
Reproduction, Aftermarket, Kits, Hardware
Fasteners & Hardware
Bolts, Clips, Screws, Ties, Straps, Washer, Nuts
Gauges & Accessories
Gauges, Panels, Kits, Sending Units
Interior Accessories
Armrests, Carpet, Flooring, Consoles, Dash, Door, Glove Box
Keys & Locks
Hardware, Keys, Locks, Sets, & Switches
Mirrors & Hardware
Mirrors, Mounting Hardware
Exterior
Bed Mats & Tonneau Covers
Bed Mats & Tonneau Covers
Decals
Decals, Body Stripes, Misc
Emblems
Reproduction, Aftermarket, Kits, Hardware
Exhaust
Mufflers, Headers, Pipes, Mainfolds, Tips, Kits
Fasteners & Hardware
Bolts, Clips, Screws, Ties, Straps, Washer, Nuts
Gaskets & Seals
Adhesives, Gaskets, Seals, Weatherstripping
Keys & Locks
Hardware, Keys, Locks, Sets, & Switches
Lamps & Lenses
Headlights, Lamps, Lenses, Bulbs, Hardware
Mirrors & Hardware
Mirrors, Mounting Hardware
Wheels & Accessories
Lug Nuts, Bolts, Studs, Wheels, Accessories
Body Parts & Trim
Bumpers & Hardware
Bumpers, Hardware, Inserts, Brackets
Convertible Tops & Accessories
Tops, Moldings, Boots, Hardware
Door Handles & Hardware
Door & Window Handles, Door Hinges
Mirrors & Hardware
Mirrors, Mounting Hardware
Moldings
Front End, Rear, Side, Window, Hardware
Sheet Metal & Body Panels
Doors, Hoods, Fenders, Quarter, Trunk, Floor, Armrest
Trunk Panels & Accessories
Mats, Dividers, Hardware, Accessories
Vinyl Tops
Tops, Modlings, Clips
Window
Glass, Motors, Regulators, Hardware
Suspension & Brakes
Brake Systems
Disc, Drum, Master Cylinders, Boosters, Pumps, Valves
Chassis & Suspension
Bushings, Mounts, Chassis, Steering, Suspension
Fasteners & Hardware
Bolts, Clips, Screws, Ties, Straps, Washer, Nuts
Engine & Drivetrain
Air & Fuel Delivery
Air Cleaners, Filters, Carburetors, Pumps, Tanks, Manifolds
Cooling & Heating
Air Conditioning, Controls, Fans, Motors, Cores, Radiators, Thermostats, Heaters, Pumps, Ducts
Decals
Decals, Body Stripes, Misc
Drivetrain
Differentials, Driveshafts, Chaines, Shifters, Transmissions, Bearings, Seals
Emblems
Reproduction, Aftermarket, Kits, Hardware
Engines & Components
Belts, Pulleys, Camshafts, Heads, Oiling Systems, Engines
Exhaust
Mufflers, Headers, Pipes, Mainfolds, Tips, Kits
Fasteners & Hardware
Bolts, Clips, Screws, Ties, Straps, Washer, Nuts
Fittings & Hoses
Fittings, Clamps, Brackets, Hoses, Lines, Plugs, Tubing, Valves
Gaskets & Seals
Adhesives, Gaskets, Seals, Weatherstripping
Ignition & Electrical
Alternators, Wiring, Horns, Starters, Distributors
Oils, Fluids & Sealer
Oils, Fluids, Grease, Lubricants, Grease, Cleaners, Sealers, Glues
Windshield Washer
Bottles, Pumps, Arms, Motors, Switches, Hardware
Audio & Electric
Gauges & Accessories
Gauges, Panels, Kits, Sending Units
Ignition & Electrical
Alternators, Wiring, Horns, Starters, Distributors
Mobile Electronics
Antennas, Radios, Speakers, GPS, iPod, Bluetooth
Tools & More
Books
Owners Manuals, Service Manuals, History
Car Care & Paint
Covers, Cleaners, Waxes, Polishes, Paints, Coatings, Dyes, Markers
Fasteners & Hardware
Bolts, Clips, Screws, Ties, Straps, Washer, Nuts
Gifts & Apparel
Shirts, Jackets, Hats, Plates, Garage Decor
Tools & Shop Equipment
Brake, Electrical, Engine, Fuel, Hand, Suspension, Wheel, Tire
×
We use cookies to ensure that we give you the best experience on our website. Click
here
for more information.
Got It
250th Anniversary Sale
Save up to 20% on Restoration - use code: USA250
Home
K15/K1500
1978
Ignition & Electrical
Electrical Wiring
1978 GMC K15/K1500
Electrical Wiring
Filters
12
24
36
48
60
96
120
Relevance
Best Selling
A-Z ↓
Z-A ↑
Highest Price ↑
Lowest Price ↓
Newest Arrivals
×
Product Type
Aftermarket
48
Performance
29
Restoration
59
Part Type
Auto Trans Kick Down
2
Auxiliary Heater Switch Connector
2
Back Up Light Wiring Harness
1
Battery
15
Battery Cable Harness
1
Battery Ground Cable
1
Battery Relocation Kit
1
Body Wiring Harness
3
Brake Light Switch
1
Chassis Wire Harness
5
Clamp Value Pack
1
Dashboard Wiring Harness
2
Distributor Wire Harness
1
Dome Lamp Connector
1
Door Wiring Harness
2
Electrical Clamp
12
Engine Compartment Insulation
4
Engine Wiring Harness
4
Fuel Pump Relay
1
Grommet
1
Headlight Relay
2
Headlight Wiring Harness
1
Heat Shield Insulator
5
Instrument Panel Light Socket
3
License Plate Light Wiring Harness
1
Neutral Safety Switch
1
Pigtail
1
Power Window and Door Lock Wiring Harness
4
Radio Wire Harness
1
Spark Plug Boot Heat Sleeve
1
Spark Plug Wire Holder
3
Tachometer Wire Harness
1
Tie Strap and Clip
1
Tubing
1
Windshield Washer Switch
1
Wire Separator
9
Wire Wrapping Tool
2
Wiring Harness Tape
2
Wiring Relay
1
Uncategorized
34
Category
Charging Systems
15
Computers, Chips & Programmers
1
Convertible Top Hardware
1
Dash & Accessories
3
Electrical & Electrical Testing Tools
2
Electrical Wiring
136
Fuel Pumps & Regulators
1
Gauges, Panels & Kits
1
Headlights
1
Lamp Hardware
1
Lines
4
Pedal Pads
1
Shifters
1
Spark Plug Wires & Accessories
27
Steering Components
1
Tubing
9
Window Hardware
1
Price
$1 - $100
76
$101 - $200
13
$201 - $300
15
$301 - $400
6
$401 - up
26
New Arrival
New
48
Brand
American Autowire
3
Antigravity Batteries
15
Lokar
27
M&H
47
MSD
1
Painless Performance
26
Thermo-Tec
5
Review Rating
ooooo
ooooo
6
ooooo
ooooo
5
ooooo
ooooo
1
Not Yet Reviewed
124
NEW
M&H
Wiring Harness, Rear Light Inter., 77-82 GM Truck, Short Bed, w/o HD Chassis
ooooo
ooooo
$197.99
NEW
Painless Performance
Wiring Harness, Chassis, Classic Custom-Plus, 73-87 Truck/Suburban, 27 Circuit
ooooo
ooooo
$754.99
NEW
M&H
Wiring Harness, Heater, 73-80 GM Truck/SUB/Blazer/Jimmy, w/HD Heater, w/o AC
ooooo
ooooo
$95.99
NEW
M&H
Wiring Harness, Dome Lamp, 76-79 GM Truck, Dome & Cargo Ext, Exc. Blazer/Jimmy
ooooo
ooooo
$42.99
NEW
M&H
Wiring Harness, AC Ext. 1976-78 GM Truck/SUB/Blazer/Jimmy, 454, Comp.to Harness
ooooo
ooooo
$39.99
NEW
M&H
Wiring Harness, AC Ext. 77-78 GM Truck/SUB/Blazer/Jimmy, SB, Comp.to Harness
ooooo
ooooo
$51.99
NEW
M&H
Wire Harness, Power Window, 78 GM Truck/Blazer/Jimmy, 2dr, X-Over, Pow. Locks
ooooo
ooooo
$289.99
NEW
M&H
Wire Harness, Power Window, 1978 GM Truck/Blazer/Jimmy, 2-Door, Power Locks
Left Side / Right Side
ooooo
ooooo
$245.99
NEW
M&H
Wire Harness, Power Window, 78 GM Truck/Blazer/Jimmy, 2dr, X-Over, Man. Locks
ooooo
ooooo
$289.99
NEW
M&H
Wire Harness, Power Window, 1978 GM Truck/Blazer/Jimmy, 2-Door, Manual Locks
Left Side / Right Side
ooooo
ooooo
$218.99
NEW
M&H
Wire Harness, Power Door Lock, 77-78 GM Truck/Blzr/Jim, 2DR XOver, No Pwr Wndw
ooooo
ooooo
$282.99
NEW
M&H
Wire Harness, Power Door Lock, 78 GM Truck/Blzer/Jimmy, 2DR LH/RH, No Pwr Wndw
ooooo
ooooo
$218.99
NEW
M&H
Wire Harness, Radio to Cntr Spkr, 78-82 GM Truck/Sub/Blazer/Jimmy, Exc. Stereo
ooooo
ooooo
$41.99
NEW
M&H
Ground Wire, Auxiliary Battery, 1973-80 Truck/SUB/Blazer/Jimmy, w/Camper Option
ooooo
ooooo
$31.99
NEW
M&H
Wire Harness, Tachometer, 1978 GM Truck/Suburban/Blazer/Jimmy
ooooo
ooooo
$54.99
NEW
M&H
Wiring Harness, Dash, 1978 GM Truck/Suburban/Blazer/Jimmy
2 Transmission Options
ooooo
ooooo
From
$1,045.99
NEW
M&H
Wire Harness, Dash Clock, 1978 GM Truck/Suburban/Blazer/Jimmy, From Fuse Panel
ooooo
ooooo
$34.99
NEW
M&H
Wiring Harness, Engine, 1978 GM Truck/Suburban/Blazer/Jimmy, 250 w/CA Emi. Sys.
ooooo
ooooo
$379.99
NEW
M&H
Wiring Harness, Engine, 78 GM Truck/Suburban/Blazer/Jimmy, 250/292 , No CA Emi.
ooooo
ooooo
$379.99
NEW
M&H
Wiring Harness, Engine, 1978 GM Truck/Suburban/Blazer/Jimmy, V8 305/350/400
ooooo
ooooo
$337.99
NEW
M&H
Wiring Harness, Engine, 1978 GM Truck/Suburban/Blazer/Jimmy, V8 454
ooooo
ooooo
$337.99
NEW
M&H
Wiring Harness, Heater, 73-80 GM Truck/SUB/Blazer/Jimmy, w/o AC
ooooo
ooooo
$81.99
NEW
M&H
Wiring Harness, Air Condition, 78 GM Truck/SUB/Blazer/Jimmy, 1D, w/Heater Wrng
ooooo
ooooo
$295.99
NEW
M&H
Wiring Harness, Air Condition, 78-80 GM Truck/SUB/Blazer/Jimmy, 2D, w/Heatr Wrng
ooooo
ooooo
$295.99
Page 3 of 6 - 136 Items
«
1
2
3
4
5
»
Page 3 of 6 - 136 Items
«
1
2
3
4
5
»
Free Ground Shipping
Free Ground Shipping on orders over $299 in the contiguous United States.
Shop Clearance
Save up to 55% on huge clearance deals on hundreds of items.
Earn Points for Free Parts
Earn points for every dollar you spend with OPGI’s Frequent Buyer Rewards Program.
Price Match Guarantee
We’ll price match any currently advertised retail price offered by a retail competitor.
Select Your Vehicle
Find parts that fit your vehicle
GM Cars
GM Trucks
Make
Model
Year
Go