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Used Peterbilt 378 Truck Parts For Sale by Dealerships

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Air Intake & Filtration (41)   Air Cleaners / Air Filter Housings (21)   Air Transfer Tubes (20)Air Tanks (20)Axles & Differentials (43)   Axle Assemblies, Front (41)   Spindles / Knuckles (2)Battery Box Covers (2)Battery Boxes / Trays (20)Brakes (5)   ABS Control Modules (1)   Air Dryers (3)   Brake Parts (1)Cab Mounts (5)Cab, Body & Interior (276)   Back Windows (1)   Bumpers, Front (15)   Cabs (32)   Dashboards (14)   Door Assemblies, Front (20)   Door Mirrors (21)   Door Vent Glass (1)   Door Window Regulators (2)   Door Windows (1)   Doors (45)   Fender Extensions (2)   Fenders (3)   Grilles (3)   Hood Hinges (2)   Hoods (29)   Interior Misc. Parts (21)   Mirrors (5)   Roof Fairings (1)   Seats (9)   Side View Mirrors (15)   Sleeper Doors (6)   Sleepers (8)   Steering Wheels (3)   Sun Visors (Exterior) (1)   Sun Visors (16)Cooling & HVAC (73)   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 (28)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 (30)   Brackets, Misc. (7)   Crossmembers (9)   Deck Plates / Catwalk (1)   Frame Horns (10)   Frames (2)   Headache Racks (1)Fuel System (53)   Fuel / Water Separators (1)   Fuel Tank Straps & Brackets (14)   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 (776)
Model
378 (776)
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Showing 51 - 75 of 776 Listings

51 - 75 of 776 listings
51 - 75 of 776 listings
Peterbilt 378 Front Axle Assembly

2006 Peterbilt 378 Front Axle Assembly

$5,500 USD
20K FRONT AXLE CONVERSION/ASSY. DUAL GEARBOXES LH#M110PHM14 RH# M905AD17., Capacity: 20K, Hub Bolts: 10, Brake Type: AIR, Axle Make: SPICER
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2006
Capacity20K
Stock Number11026-5
MLS Number14091626
CategoryAxle Assemblies, Front
Last Updated5/15/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
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Holst Truck Parts
Peterbilt 378 Left Fuel Tank

2005 Peterbilt 378 Left Fuel Tank

$350 USD
USED TANK ASSEMBLY SMALL DENTS ON BOTTOM/ SEE PICTURES/ 68" WELD TO WELD, Capacity: 150, Dimensions: 26X68, Material: Aluminum
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2005
SideLEFT
Capacity150
Part Number11-04651-046B011J
Stock Number101424-7
MLS Number13212631
CategoryFuel Tanks (Truck)
Last Updated5/15/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
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Peterbilt 378 Radiator

2005 Peterbilt 378 Radiator

$895 USD
GOOD USED TAKEOUT/ PRESSURE CHECKED RADIATOR ASSEMBLY/ NO RADIATOR CAP/ FIREWALL MOUNTED RESERVOIR, Engine Make: Caterpillar, Engine Model: C15, With Frame: true
ConditionUsed
Fits To Make(s)Peterbilt
Fits To Model(s)378
Will Fit Year(s)2005
Part Number239298
Stock Number60224-7
MLS Number12918614
CategoryRadiators
Last Updated6/13/2026
Location
Ucon, ID, US
Sold By
Holst Truck Parts
(833) 541-___  SHOW
NUMBERCall Seller
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Holst Truck Parts
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