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1989 Peterbilt 378

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Displaying 1 to 25 (of 118 products)
On Sale:

$18.05

Avail:
6 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
 
1
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/1/2 Belt T.W.
W/42 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
Air Conditioning High Capacity V-Belt (Standard)
W/1/2 Belt T.W.
W/42 1/2 Belt O.C.

1 Per Vehicle
On Sale:

$12.21

Avail:
1 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator
 
High Capacity V-Belt (Standard)
W/43 7/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator High Capacity V-Belt (Standard)
W/43 7/8 Belt O.C.
Optional Belt

2 Per Vehicle
On Sale:

$15.27

Avail:
2 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator
 
High Capacity V-Belt (Standard)
W/46 3/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator High Capacity V-Belt (Standard)
W/46 3/8 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator and Air Conditioning
 
High Capacity V-Belt (Standard)
W/46 1/2 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator and Air Conditioning High Capacity V-Belt (Standard)
W/46 1/2 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
2
 
Alternator
 
High Capacity V-Belt (Standard)
W/47 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Alternator High Capacity V-Belt (Standard)
W/47 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
 
1
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/V-Belt Drive
 
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
Air Conditioning High Capacity V-Belt (Standard)
W/V-Belt Drive

1 Per Vehicle
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
 
2
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/46 7/8 Belt O.C.
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
Air Conditioning High Capacity V-Belt (Standard)
W/46 7/8 Belt O.C.
PowerBand belt may work, use template to check

2 Per Vehicle
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
 
2
 
Alternator
 
High Capacity V-Belt (Standard)
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
Alternator High Capacity V-Belt (Standard)
PowerBand belt may work, use template to check

2 Per Vehicle
On Sale:

$19.60

Avail:
3 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator
 
High Capacity V-Belt (Heavy-Duty)
W/46 3/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator High Capacity V-Belt (Heavy-Duty)
W/46 3/8 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator and Air Conditioning
 
High Capacity V-Belt (Heavy-Duty)
W/46 1/2 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator and Air Conditioning High Capacity V-Belt (Heavy-Duty)
W/46 1/2 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
2
 
Alternator
 
High Capacity V-Belt (Heavy-Duty)
W/47 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Alternator High Capacity V-Belt (Heavy-Duty)
W/47 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
 
1
 
Air Conditioning
 
High Capacity V-Belt (Heavy-Duty)
W/V-Belt Drive
 
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
Air Conditioning High Capacity V-Belt (Heavy-Duty)
W/V-Belt Drive

1 Per Vehicle
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
 
2
 
Air Conditioning
 
High Capacity V-Belt (Heavy-Duty)
W/46 7/8 Belt O.C.
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
Air Conditioning High Capacity V-Belt (Heavy-Duty)
W/46 7/8 Belt O.C.
PowerBand belt may work, use template to check

2 Per Vehicle
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
 
2
 
Alternator
 
High Capacity V-Belt (Heavy-Duty)
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
Alternator High Capacity V-Belt (Heavy-Duty)
PowerBand belt may work, use template to check

2 Per Vehicle
On Sale:

$18.28

Avail:
6 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
2
 
Alternator
 
High Capacity V-Belt (Standard)
W/48 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Alternator High Capacity V-Belt (Standard)
W/48 Belt O.C.
Optional Belt

2 Per Vehicle
On Sale:

$15.98

Avail:
6 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
 
1
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/48 3/8 Belt O.C.
 
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
Air Conditioning High Capacity V-Belt (Standard)
W/48 3/8 Belt O.C.

1 Per Vehicle
On Sale:

$13.43

Avail:
8 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
 
2
 
Alternator
 
High Capacity V-Belt (Standard)
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
Alternator High Capacity V-Belt (Standard)
PowerBand belt may work, use template to check

2 Per Vehicle
On Sale:

$16.03

Avail:
5 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
1
 
Alternator and Air Conditioning
 
High Capacity V-Belt (Standard)
W/50 Belt O.C.
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator and Air Conditioning High Capacity V-Belt (Standard)
W/50 Belt O.C.

1 Per Vehicle
On Sale:

$20.75

Avail:
1 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
 
1
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/52 3/8 Belt O.C.
 
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
Air Conditioning High Capacity V-Belt (Standard)
W/52 3/8 Belt O.C.

1 Per Vehicle
On Sale:

$18.72

Avail:
2 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/53 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Air Conditioning High Capacity V-Belt (Standard)
W/53 1/2 Belt O.C.

1 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Fan
 
High Capacity V-Belt (Standard)
W/53 1/2 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Fan High Capacity V-Belt (Standard)
W/53 1/2 Belt O.C.
Optional Belt

1 Per Vehicle
On Sale:

$17.41

Avail:
2 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator and Air Conditioning
 
High Capacity V-Belt (Standard)
W/54 1/2 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator and Air Conditioning High Capacity V-Belt (Standard)
W/54 1/2 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/54 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Air Conditioning High Capacity V-Belt (Standard)
W/54 1/2 Belt O.C.

1 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Fan
 
High Capacity V-Belt (Standard)
W/54 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Fan High Capacity V-Belt (Standard)
W/54 1/2 Belt O.C.

1 Per Vehicle
On Sale:

$18.41

Avail:
7 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/55 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Air Conditioning High Capacity V-Belt (Standard)
W/55 1/2 Belt O.C.

1 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Fan
 
High Capacity V-Belt (Standard)
W/55 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Fan High Capacity V-Belt (Standard)
W/55 1/2 Belt O.C.

1 Per Vehicle
On Sale:

$13.75

Avail:
6 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator and Air Conditioning
 
High Capacity V-Belt (Standard)
W/56 1/2 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator and Air Conditioning High Capacity V-Belt (Standard)
W/56 1/2 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Fan
 
High Capacity V-Belt (Standard)
W/56 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Fan High Capacity V-Belt (Standard)
W/56 1/2 Belt O.C.

1 Per Vehicle
On Sale:

$21.91

Avail:
1 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Fan
 
High Capacity V-Belt (Standard)
W/57 3/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Fan High Capacity V-Belt (Standard)
W/57 3/8 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Fan
 
High Capacity V-Belt (Standard)
W/57 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Fan High Capacity V-Belt (Standard)
W/57 1/2 Belt O.C.

1 Per Vehicle
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
 
2
 
Alternator and Air Conditioning
 
High Capacity V-Belt (Standard)
W/57 1/2 Belt O.C.
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
Alternator and Air Conditioning High Capacity V-Belt (Standard)
W/57 1/2 Belt O.C.
PowerBand belt may work, use template to check

2 Per Vehicle
On Sale:

$16.78

Avail:
6 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
1
 
Fan
 
High Capacity V-Belt (Standard)
W/58 3/8 Belt O.C.
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Fan High Capacity V-Belt (Standard)
W/58 3/8 Belt O.C.

1 Per Vehicle
On Sale:

$19.93

Avail:
1 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
1
 
Fan
 
High Capacity V-Belt (Standard)
W/59 Belt O.C.
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Fan High Capacity V-Belt (Standard)
W/59 Belt O.C.

1 Per Vehicle
On Sale:

$12.52

Avail:
1 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator and Air Conditioning
 
High Capacity V-Belt (Standard)
W/59 3/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator and Air Conditioning High Capacity V-Belt (Standard)
W/59 3/8 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Air Conditioning
 
High Capacity V-Belt (Standard)
W/59 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Air Conditioning High Capacity V-Belt (Standard)
W/59 1/2 Belt O.C.

1 Per Vehicle
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
 
2
 
Alternator and Air Conditioning
 
High Capacity V-Belt (Standard)
W/59 1/2 Belt O.C.
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
Alternator and Air Conditioning High Capacity V-Belt (Standard)
W/59 1/2 Belt O.C.
PowerBand belt may work, use template to check

2 Per Vehicle
On Sale:

$17.01

Avail:
6 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Fan
 
High Capacity V-Belt (Standard)
W/64 3/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Fan High Capacity V-Belt (Standard)
W/64 3/8 Belt O.C.
Optional Belt

2 Per Vehicle
On Sale:

$22.07

Avail:
2 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Fan
 
High Capacity V-Belt (Heavy-Duty)
W/64 3/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Fan High Capacity V-Belt (Heavy-Duty)
W/64 3/8 Belt O.C.
Optional Belt

2 Per Vehicle
On Sale:

$18.03

Avail:
6 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Fan
 
High Capacity V-Belt (Standard)
W/66 3/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Fan High Capacity V-Belt (Standard)
W/66 3/8 Belt O.C.
Optional Belt

2 Per Vehicle
On Sale:

$18.66

Avail:
1 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
 
2
 
Fan
 
Truck & Bus V-Belt
W/54 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
Fan Truck & Bus V-Belt
W/54 1/2 Belt O.C.

2 Per Vehicle
On Sale:

$20.75

Avail:
1 in Stock
Warehouse: US-1
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
 
2
 
Fan
 
Truck & Bus V-Belt
W/55 1/2 Belt O.C.
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo
Fan Truck & Bus V-Belt
W/55 1/2 Belt O.C.

2 Per Vehicle
On Sale:

$24.41

Avail:
9 in Stock
Warehouse: US-4
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
 
1
 
Air Conditioning
 
Professional-Standard
W/42 1/2 Belt O.C.
W/1/2 Belt T.W.
 
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
Air Conditioning Professional-Standard
W/42 1/2 Belt O.C.
W/1/2 Belt T.W.

1 Per Vehicle
On Sale:

$19.52

Avail:
11 in Stock
Warehouse: US-4
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator
 
Professional-Standard
W/43 7/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator Professional-Standard
W/43 7/8 Belt O.C.
Optional Belt

2 Per Vehicle
On Sale:

$23.85

Avail:
11 in Stock
Warehouse: US-4
Qty:
EnginePer VehiclePositionFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator
 
Professional-Standard
W/46 3/8 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator Professional-Standard
W/46 3/8 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
2
 
Alternator and Air Conditioning
 
Professional-Standard
W/46 1/2 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
Alternator and Air Conditioning Professional-Standard
W/46 1/2 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
2
 
Alternator
 
Professional-Standard
W/47 Belt O.C.
Optional Belt
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
Alternator Professional-Standard
W/47 Belt O.C.
Optional Belt

2 Per Vehicle
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
 
1
 
Air Conditioning
 
Professional-Standard
W/V-Belt Drive
 
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
Air Conditioning Professional-Standard
W/V-Belt Drive

1 Per Vehicle
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
 
2
 
Air Conditioning
 
Professional-Standard
W/46 7/8 Belt O.C.
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
Air Conditioning Professional-Standard
W/46 7/8 Belt O.C.
PowerBand belt may work, use template to check

2 Per Vehicle
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
 
2
 
Alternator
 
Professional-Standard
PowerBand belt may work, use template to check
 
1989 Peterbilt 378 equipped with
14.0L L6 Diesel Turbo
Alternator Professional-Standard
PowerBand belt may work, use template to check

2 Per Vehicle
Displaying 1 to 25 (of 118 products)