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
K20
My Garage
25
View Garage
1978
Chevrolet
K20
Shop Parts
Filter Search
1969
Buick
Riviera
Shop Parts
Filter Search
1988
Cadillac
Seville
Shop Parts
Filter Search
1961
Cadillac
60 Special
Shop Parts
Filter Search
1973
Chevrolet
Suburban
Shop Parts
Filter Search
1960
Chevrolet
Corvair
Shop Parts
Filter Search
1977
Chevrolet
K20
Shop Parts
Filter Search
1982
GMC
Caballero
Shop Parts
Filter Search
1966
Chevrolet
El Camino
Shop Parts
Filter Search
1982
GMC
C15/C1500
Shop Parts
Filter Search
2014
Chevrolet
Malibu
Shop Parts
Filter Search
1975
Chevrolet
Monte Carlo
Shop Parts
Filter Search
1983
GMC
K15/K1500
Shop Parts
Filter Search
1986
Chevrolet
K30
Shop Parts
Filter Search
1981
GMC
Caballero
Shop Parts
Filter Search
1946
Cadillac
Series 60
Shop Parts
Filter Search
1980
Chevrolet
Monte Carlo
Shop Parts
Filter Search
1986
Buick
Regal
Shop Parts
Filter Search
1972
Buick
Skylark
Shop Parts
Filter Search
2003
Cadillac
DeVille
Shop Parts
Filter Search
1979
Chevrolet
K20
Shop Parts
Filter Search
1986
GMC
C35/C3500
Shop Parts
Filter Search
1968
Buick
Skylark
Shop Parts
Filter Search
1983
Chevrolet
Suburban
Shop Parts
Filter Search
1982
Cadillac
Seville
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
Exterior
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
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
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
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
★ July 4th Bonus! ★
Stack the savings with free shipping over
$99
+ Save up to 20% - use code: USA250
Home
K20
1978
Cooling & Heating
1978 K20
Cooling & Heating
Categories
Air Conditioning
Fans
Heater Blower Motors
Heater Cores
Heaters
Hvac Ducts & Accessories
Overflow Tanks & Catch Cans
Radiators
Thermostats, Housings & Fillers
Water Pumps
1978 K20
Cooling & Heating
Filters
12
24
36
48
60
96
120
Relevance
Best Selling
A-Z ↓
Z-A ↑
Highest Price ↑
Lowest Price ↓
Newest Arrivals
×
Product Type
Aftermarket
42
Performance
48
Restoration
41
Part Type
A/C Compressor
8
A/C Compressor and Condenser Kit
3
A/C Compressor Bracket
2
A/C Condenser and Evaporator Assembly
1
A/C Control Switch
1
A/C Evaporator Core Kit
2
Alternator Bracket
1
Cooling System Adapter
2
Electric Engine Water Pump
5
Engine Coolant Fan Mounting Kit
1
Engine Coolant Recovery Tank
2
Engine Coolant Recovery Tank Hose
1
Engine Coolant Temperature Sensor
3
Engine Coolant Thermostat
1
Engine Coolant Thermostat/Water Outlet Assembly
1
Engine Cooling Control Module
1
Engine Cooling Fan Assembly
22
Engine Cooling Fan Bracket
2
Engine Cooling Fan Clutch
1
Engine Cooling Fan Motor Wiring Harness
5
Engine Cooling Fan Spacer Kit
1
Engine Water Pump
11
Engine Water Pump Assembly
1
Firewall Grommet
3
HVAC Blower Motor
2
HVAC Control Duct Hose
14
HVAC Defrost and Heater Air Duct Hose
6
HVAC Heater Core
2
Pigtail
1
Radiator
10
Radiator Coolant Hose
4
Radiator Mount Bushing
2
Thermal Acoustic Insulation
1
Wheel
1
Uncategorized
8
Category
Air Conditioning
19
Fans
40
Heater Blower Motors
3
Heater Cores
2
Heaters
1
Hvac Ducts & Accessories
26
Overflow Tanks & Catch Cans
4
Radiators
16
Thermostats, Housings & Fillers
2
Water Pumps
19
Price
$1 - $100
65
$101 - $200
28
$201 - $300
4
$301 - $400
6
$401 - up
28
New Arrival
New
16
Brand
AC Delco
2
Aeromotive
7
Cold Case Radiators
1
Eddie Motorsports
2
Energy Suspension
1
Lokar
1
Maradyne
38
NotcHead
3
Old Air Products
16
Performance by OPGI
1
RESTOPARTS
1
Tuff Stuff
16
U.S. Radiator
11
Vintage Air
12
Review Rating
ooooo
ooooo
17
ooooo
ooooo
6
ooooo
ooooo
4
ooooo
ooooo
1
Not Yet Reviewed
103
NEW
U.S. Radiator
Radiator, Std Core, 1978-81 GM Truck/SUB/Blzr/Jimmy, V8, 19-1/2" x 28-3/8" Core
8 Transmission/Rows Options
ooooo
ooooo
From
$845.99
Tuff Stuff
AC Compressor, Tuff Stuff, Sanden SD7 Style, R-134A, 6-Groove Pulley
5 Finish Options
ooooo
ooooo
From
$434.99
Maradyne
Fans, Maradyne Mach 2, Dual 11", Side Flanges
ooooo
ooooo
$346.99
Water Pump, 1978-87 El Camino, 78-83 Malibu, 78-88 Monte Carlo, 81-82 Regal
ooooo
ooooo
$67.99
NEW
Heater Core, Aluminum, 1973-87 GM Trucks, 73-91 Suburban & Blazer, w/AC
ooooo
ooooo
$49.99
Maradyne
Fans, Maradyne Mach Series, Dual 11", Top & Bottom Flanges
ooooo
ooooo
$346.99
Maradyne
Wiring Harness, Fan, Maradyne, w/ Adjustable Sender
ooooo
ooooo
$91.99
NEW
U.S. Radiator
Radiator, Std Core, 1978-80 GM Truck/SUB/Blazer/Jimmy, 6Cyl, 17" x 28-3/8" Core
6 Transmission/Rows Options
ooooo
ooooo
From
$628.99
Maradyne
Fan Mounting Bracket Strips, Metal, Maradyne (SET)
ooooo
ooooo
$29.99
NEW
U.S. Radiator
Radiator, HE Core, 1978-80 GM Truck/SUB/Blazer/Jimmy, 6Cyl, 17" x 28-3/8" Core
6 Transmission/Rows Options
ooooo
ooooo
From
$764.99
SALE
Duct Hose, GM Vehicles, Heater & A/C, 1-¾", Vinyl, 6-Foot long
ooooo
ooooo
$37.99
Save an extra 8%
Use
USA250
at checkout
Tuff Stuff
AC Compressor, Tuff Stuff, Sanden SD508 Style, R-134A, 6-Groove Pulley
5 Finish Options
ooooo
ooooo
From
$449.99
SALE
AC Delco
Duct Hose, GM Vehicles, Heater & A/C, 3-1/2", Vinyl, 6-Foot Length
ooooo
ooooo
$59.99
Save an extra 12%
Use
USA250
at checkout
Maradyne
Fan, Electric, Maradyne Jetstreme II, Dual, 26" x 3.62", 2600 CFM, 24.8-amp
2 Included Options
ooooo
ooooo
From
$369.99
Lokar
Water Pump, Lokar, LS, Aluminum, F-body/GTO Style, Cast Finish
ooooo
ooooo
$205.99
NEW
U.S. Radiator
Radiator, Std Core, 1978-80 GM Truck/SUB/Blzr/Jimmy, V8, 17" x 28-3/8" Core
8 Transmission/Rows Options
ooooo
ooooo
From
$729.99
Tuff Stuff
Water Pump, Tuff Stuff Aluminum, Chev BB Long Pump, SuperCool Smoothie
5 Finish Options
ooooo
ooooo
From
$245.99
NEW
U.S. Radiator
Radiator, HE Core, 1978-80 GM Truck/SUB/Blzr/Jimmy, V8, 17" x 28-3/8" Core
8 Transmission/Rows Options
ooooo
ooooo
From
$885.99
NEW
U.S. Radiator
Radiator, Std Core, 1978-80 GM Truck/SUB/Blazer/Jimmy, 6Cyl, 17" x 26-1/4" Core
6 Transmission/Rows Options
ooooo
ooooo
From
$672.99
NEW
U.S. Radiator
Radiator, HE Core, 1978-80 GM Truck/SUB/Blazer/Jimmy, 6Cyl, 17" x 26-1/4" Core
6 Transmission/Rows Options
ooooo
ooooo
From
$816.99
Tuff Stuff
Water Pump, Tuff Stuff Aluminum, Chev SB Long Pump, SuperCool Smoothie
5 Finish Options
ooooo
ooooo
From
$201.99
NotcHead
Firewall Trim Ring, Notchead, 3/4" Hose Diameter
3 Finish Options
ooooo
ooooo
From
$19.99
Maradyne
Fan Controller, Maradyne, Adjustable, w/Temp Sensor,
ooooo
ooooo
$172.99
NEW
U.S. Radiator
Radiator, HE Core, 1978-81 GM Truck/SUB/Blzr/Jimmy, V8, 19-1/2" x 28-3/8" Core
8 Transmission/Rows Options
ooooo
ooooo
From
$1,024.99
Page 3 of 6 - 132 Items
«
1
2
3
4
5
»
Page 3 of 6 - 132 Items
«
1
2
3
4
5
»
Free Ground Shipping
Free Ground Shipping on orders over $99 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