1. Home
  2. For Sale
  3. Truck Parts
  4. Peterbilt
  5. 378

Peterbilt 378 Truck Parts For Sale

Close
Your Current Search
Industry
Truck Parts
Manufacturer
Peterbilt
Model
378
Market Type
Click the to remove the filter.
Save Search
Email Alert
What's Save Search and Email Alert?
Narrow Your Search
Keyword Search
Search within the selected criteria
Equipment Type
Trucks (1)
Truck Parts (772)
Category
Air Intake & Filtration (40)   Air Cleaners / Air Filter Housings (20)   Air Transfer Tubes (20)Air Tanks (20)Axles & Differentials (42)   Axle Assemblies, Front (40)   Spindles / Knuckles (2)Battery Box Covers (2)Battery Boxes / Trays (19)Brakes (5)   ABS Control Modules (1)   Air Dryers (3)   Brake Parts (1)Cab Mounts (5)Cab, Body & Interior (277)   Back Windows (1)   Bumpers, Front (16)   Cabs (31)   Dashboards (14)   Door Assemblies, Front (20)   Door Mirrors (22)   Door Vent Glass (1)   Door Window Regulators (2)   Door Windows (1)   Doors (45)   Fender Extensions (2)   Fenders (3)   Grilles (3)   Hood Hinges (2)   Hoods (30)   Interior Misc. Parts (21)   Mirrors (5)   Roof Fairings (1)   Seats (9)   Side View Mirrors (15)   Sleeper Doors (6)   Sleepers (7)   Steering Wheels (3)   Sun Visors (Exterior) (1)   Sun Visors (16)Cooling & HVAC (75)   A/C Compressors (1)   A/C Condensers (3)   Blower Motors (HVAC) (2)   Cooling Assemblies (Rad., Cond., ATAAC) (5)   Fan Blades (1)   Fan Clutches (1)   Heater / AC Climate Control Parts (12)   Intercoolers & Charge Air Coolers (10)   Intercoolers (1)   Radiator Frames (1)   Radiator Overflow Bottles / Surge Tanks (8)   Radiators (30)Electrical & Lighting (38)   Body / Chassis Control Modules (1)   Cab Wiring Harnesses (1)   Door Electrical Switches (1)   Fuse Boxes & Panels (6)   Gauges (4)   Headlight Assemblies (7)   Radios (4)   Side Marker Lamps (1)   Throttle Position Sensors (4)   Windshield Washer Reservoirs (4)   Windshield Wiper Arms (2)   Windshield Wiper Motors (3)Electrical Misc. Parts (1)Engine & Powertrain (5)   Engine Mounts (5)Exhaust & Emissions (18)   Exhaust Assemblies (4)   Exhaust Brackets (12)   Exhaust Pipes (2)   Exhaust Parts (4)Exterior Misc. Parts (14)Frame & Chassis (28)   Brackets, Misc. (7)   Crossmembers (9)   Deck Plates / Catwalk (1)   Frame Horns (10)   Frames (1)Fuel System (52)   Fuel / Water Separators (1)   Fuel Tank Straps & Brackets (13)   Fuel Tanks (Truck) (38)Hood Parts (9)Hydraulics & PTO (3)   Hydraulic Tanks (3)Instrument Panel Clusters (28)Miscellaneous Truck Parts (4)Power Steering Reservoirs (2)Suspension & Steering (61)   Leaf Springs, Front (12)   Power Steering Assemblies (1)   Spring Hangers (3)   Steering Columns (20)   Steering Gears / Racks (2)   Steering Pumps (1)   Steering Shafts (1)   Suspension Crossmembers / K-Frames (6)   Suspension Misc. Parts (8)   Suspensions (7)Tool Boxes (10)Transmission & Driveline (9)   Driveshaft Parts (2)   Driveshafts (7)Truck Bodies / Boxes / Beds (1)Wheels, Tires & Hubs (1)   Mud Flap Hangers (1)
Make
Peterbilt (773)
Model
378 (773)
A limited list of models are shown. Select a category above to view all available models.
Condition
Model Year
-
Horsepower
-
Price
-
Country
State / Region
Select a country to view available states.
Market Type

Shop Truck Parts by Category

Showing 101 - 125 of 773 Listings

101 - 125 of 773 listings
101 - 125 of 773 listings
Peterbilt 378 Radiator

2004 Peterbilt 378 Radiator

$995 USD
GOOD USED RADIATOR ASSEMBLY. WILL PRESSURE CHECK. 90 DAY WARRANTY 378/379 RESERVIOR ON TOP, Engine Make: Caterpillar, Engine Model: C15, Material: COPPER BRASS
ConditionUsed
Engine ModelCaterpillar C15
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2004
Part Number239208
Stock Number122622-13
MLS Number11809831
CategoryRadiators
Last Updated5/15/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
Email Seller
Save
Holst Truck Parts
Peterbilt 378 Cab Assembly

2004 Peterbilt 378 Cab Assembly

$5,995 USD
UNIBILT CAB SHELL ASSEMBLY/ HAS EXTERNAL BREATHERS/CAT WIRING NO GUAGES/NO COLUMN/NO BREATHERS/DOORS SEPERATE, Air/Hydraulic: Air/Hydraulic, Engine Make: Caterpillar, Engine Model: C15
ConditionUsed
Engine ModelCaterpillar C15
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2004
Part Number379/378/385
Stock Number122622-6
MLS Number11809824
CategoryCabs
Last Updated5/15/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
Email Seller
Save
Holst Truck Parts
Peterbilt 378 Radiator

2003 Peterbilt 378 Radiator

$895 USD
GOOD USED RADIATOR ASSEMBLY, WILL PRESSURE CHECK. 90 DAY WARRANTY, Dimensions: NA, Engine Make: Caterpillar, Engine Model: C12, Material: COPPER/BRASS
ConditionUsed
Engine ModelCaterpillar C12
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2003
Part Number239208
Stock Number42022-13
MLS Number11363117
CategoryRadiators
Last Updated5/14/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
Email Seller
Save
Holst Truck Parts
Peterbilt 378 Charge Air Cooler (ATAAC)

2003 Peterbilt 378 Charge Air Cooler (ATAAC)

$300 USD
GOOD USED PRESSURE CHECKED AIR TO AIR/ CHARGE AIR COOLER, Engine Make: Caterpillar, Engine Model: C12
ConditionUsed
Engine ModelCaterpillar C12
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2003
Part Number222101
Stock Number42022-7
MLS Number11363111
CategoryIntercoolers & Charge Air Coolers
Last Updated5/14/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
Email Seller
Save
Holst Truck Parts
Peterbilt 378 Front Axle Assembly

2003 Peterbilt 378 Front Axle Assembly

$1,495 USD
USED AXLE ASSEMBLY OR PARTS SEALED BEARING HUB ASSEMBLY $350.00 SPINDLE $450.00, Serial#: 6NZ, Hub Bolts: 10, Brake Type: S CAM, Axle Make: ROCKWELL
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2003
Part NumberFF985
Stock Number40622-12
MLS Number11346686
CategoryAxle Assemblies, Front
Last Updated5/14/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
Email Seller
Save
Holst Truck Parts
Peterbilt 378 Radiator

1987 Peterbilt 378 Radiator

$1,095 USD
GOOD USED RADIATOR ASSEMBLY. LOW FLOW/ WILL PRESSURE CHECK. 90 DAY WARRANTY, Dimensions: GET, Engine Make: Cummins, Engine Model: 444
ConditionUsed
Engine ModelCummins 444
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)1987
Part NumberNA
Stock Number32722-13
MLS Number11293327
CategoryRadiators
Last Updated5/14/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
Email Seller
Save
Holst Truck Parts
Save Search
Email Alert
What's Save Search and Email Alert?
Want to narrow or modify your search criteria?
Filter by Price
Filter by Year
Filter by Location
Filter by Model
Filter by Keyword
Modify your search
Did you find what you were looking for? Yes No