View 2 Photos View 0 Videos 1999 Peterbilt 378 Radiator $1,095 USD USED COOLING PACK, N14 ENGINE, WILL PRESSURE CHECK, 90 DAY WARRANTY, Engine Make: Cummins, Engine Model: N14, With Frame: true ConditionUsedEngine ModelCummins N14Fits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)1999Stock Number52724-14 MLS Number12918567CategoryRadiators Last Updated8/21/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 6 Photos View 0 Videos 2005 Peterbilt 378 Fuel Tank $760 USD (USED) Peterbilt 378 Gallons: 100 Length: 51 Width/Dia: 26 Height: 26 100 GALLON ALUMINUM TANK ONLY 23" FTF ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Stock Number25719159 MLS Number13251598CategoryFuel Tanks (Truck) Last Updated8/16/2026 LocationWinimac, IN, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 6 Photos View 0 Videos 2006 Used Peterbilt 378 Deck Plate $250 USD Used 378 Deck Plate, Length: 52.25", Width: 33.75", Material: Aluminum ConditionUsedL x W52.25" x 33.75"Fits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006Stock Number651-11071 MLS Number14544667CategoryDeck Plates / Catwalk Last Updated8/15/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos 2006 Peterbilt 378 Frame Horn $695 USD LH SIDE FRAME HORN/ FRAME EXTENSION,BUMPER BRACKET/SPRING HANGER. SET BACK AXLE/377/378/385/357, Material: Aluminum ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006Part Number02-02944LStock Number112019-20 MLS Number14542977CategoryFrame Horns Last Updated8/14/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos 1994 Peterbilt 378 Left Side View Mirror $250 USD GOOD USED LH MIRROR ASSY. ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)1994SideLEFTStock Number71326-11 MLS Number14536755CategorySide View Mirrors Last Updated8/12/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Mechanical Fuel/Throttle Pedal Aluminum Peterbilt 300 Series 377/378/379/357 $150 USD GOOD USED MECHANICAL FUEL PEDAL/ GAS PEDAL/THROTTLE PEDAL. 300 SERIES PETERBILT 377/378/379/357, Material: Aluminum ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Part NumberNAStock NumberP-61093 MLS Number14536754CategoryBrake / Clutch / Gas Pedal Parts Last Updated8/12/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 10 Photos View 0 Videos 1990 Peterbilt 378 Cab Assembly $1,500 USD 1990 Peterbilt 378 Cab Complete, Wired For Caterpillar 3176A With A Eaton/ Fuller Manual Transmission. ConditionUsedStock Number4316-13 MLS Number14530678CategoryCabs Last Updated8/7/2026 LocationDinuba, CA, US Sold ByGarabedian Equipment (855) 794-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 17 Photos View 0 Videos 2006 Used Peterbilt 378 Tool Box $350 USD Used 378 Tool Box, Side: Either, Width: 36.00", Height: 21.50", Material: Aluminum, Steps: Yes, Latch/Strap: Cam-Over Latch ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006SideEitherStock Number693-10349 MLS Number14473609CategoryTool Boxes Last Updated8/6/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos Used 1993 Peterbilt 378 Tachometer Gauge $175 USD GOOD USED TACHOMETER GAUGE., Gauge Type: Tachometer ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)1993Stock Number41226-21 MLS Number14330559CategoryGauges Last Updated8/5/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos Peterbilt 378 Left Bracket $225 USD 01-49257L KNEE-ENGINE SPRT FRONT LH Quantity4ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378SideLeftStock Number107733 MLS Number13119279CategoryBrackets, Misc. Last Updated8/1/2026 LocationSalt Lake City, UT, US Sold ByVriens Truck Parts (801) 478-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos Peterbilt 378 Right Bracket $205 USD 01-49257R KNEE-ENGINE SPRT FRONT RH ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378SideRightStock Number4570 MLS Number12874286CategoryBrackets, Misc. Last Updated8/1/2026 LocationSalt Lake City, UT, US Sold ByVriens Truck Parts (801) 478-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos 2005 Peterbilt 378 Front Axle Assembly $1,495 USD GOOD USED AXLE ASSEMBLY OR PARTS, Capacity: 12000, Serial#: 35118780, Hub Bolts: 10, Brake Type: DRUM ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2005Capacity12000Part NumberE1202IStock Number101424-8 MLS Number13212632CategoryAxle Assemblies, Front Last Updated7/31/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos 1994 Peterbilt 378 Steering Column $395 USD GOOD USED STEERING COLUMN., Engine Make: Caterpillar, Engine Model: 3406B ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)1994Stock Number71326-10 MLS Number14509628CategorySteering Columns Last Updated7/28/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos 1994 Peterbilt 378 Left Door $450 USD GOOD USED LH DOOR ASSY, MANUAL WINDOW. HAS A DENT ON BOTTOM, Window Type: Manual ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)1994SideLEFTStock Number71326-7 MLS Number14509625CategoryDoors Last Updated7/28/2026 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 6 Photos View 0 Videos 2006 Used Peterbilt 378 SET, Mud Flap Hangers $258 USD Used 378 SET, Mud Flap Hangers, Dimensions: 8.00"x30.25", Side: Set, Type: Straight Type ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006SideSetStock Number727-10630 MLS Number14495219CategoryMud Flap Hangers Last Updated7/21/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos 2006 Used Peterbilt 378 Front Closing Crossmember $270 USD Used 378 Front Closing Crossmember, W x H x L: 15.25"x7.25"x30.50" ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006Stock Number648-13228 MLS Number14495114CategoryCrossmembers Last Updated7/21/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos 2006 Used Peterbilt 378 Engine Crossmember $250 USD Used 378 Engine Crossmember, W x H x L: 4.50"x9.50"x27.00" ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006Stock Number648-13229 MLS Number14495113CategoryCrossmembers Last Updated7/21/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos 2006 Used Peterbilt 378 Center Crossmember $361 USD Used 378 Center Crossmember, W x H x L: 9.75"x8.50"x32.50" Quantity3ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006Stock Number648-13230 MLS Number14495112CategoryCrossmembers Last Updated7/21/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos 2006 Used Peterbilt 378 Center Crossmember $361 USD Used 378 Center Crossmember, W x H x L: 9.75"x8.25"x32.75" ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006Part Number0147626002Stock Number648-13231 MLS Number14495111CategoryCrossmembers Last Updated7/21/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 5 Photos View 0 Videos 1999 Peterbilt 378 Right Front Door Assembly $350 USD 1999 Peterbilt 378 Passenger Side Door Assembly, Manual Window, w/ Mirror. ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378SideRightStock Number1973-10 MLS Number13897891CategoryDoor Assemblies, Front Last Updated7/16/2026 LocationFresno, CA, US Sold ByGarabedian Equipment (855) 794-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos Used Peterbilt 378 Lower Hood Roller Bracket, Part # 13-04387 $140 USD BRACKET-ROLLER LOWER HOOD STL 13-04387 Quantity14ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number102665 MLS Number12770193CategoryHood Parts Last Updated7/14/2026 LocationSalt Lake City, UT, US Sold ByVriens Truck Parts (801) 478-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 4 Photos View 0 Videos Peterbilt 378 Tilt Assist Spring Hood Bracket, Part # 13-03506 $125 USD BRACKET-TILT ASSIST SPR HOOD 13-03506 Quantity6ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number102664 MLS Number12770192CategoryHood Parts Last Updated7/14/2026 LocationSalt Lake City, UT, US Sold ByVriens Truck Parts (801) 478-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos 2006 Used Peterbilt 378 Oil Tank $1,000 USD Used 378 Oil Tank, W x H x L: 25.00" x 25.00" x 36.00" ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006Stock Number692-10145 MLS Number14475499CategoryHydraulic Tanks Last Updated7/10/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 9 Photos View 0 Videos 2006 Used Peterbilt 378 Battery Box $195 USD Used 378 Battery Box, Side: Driver, Tray Material: Aluminum, Battery Capacity: 4, Width: 29.50", Height: 13.00", Steps: No, Latch/Strap: N/A ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006SideDriverStock Number600-12557 MLS Number14475498CategoryBattery Boxes / Trays Last Updated7/10/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos 2006 Used Peterbilt 378 SET, Full Tandem Fenders $1,500 USD Used 378 SET, Full Tandem Fenders, Side: Set, Material: Steel ConditionUsedFits To Make(s)PeterbiltFits To Model(s)378Will Fit Year(s)2006SideSetStock Number608-14025 MLS Number14475497CategoryFenders Last Updated7/10/2026 LocationDorr, MI, US Sold ByFrontier Truck Parts (855) 300-___ SHOWNUMBERCall Seller Email Seller Save More Info