Melling 10555ST oil pump for the 1988-1999 Chevrolet C1500 V8 5.7L and other vehicles circulates engine oil with a high-volume, high-pressure gear design. It is a performance-grade pump meant for engines that run at higher RPM.
- Billet steel Shark Tooth helical gears in a cast iron housing and cover
- Extended drive and idler shafts give the cover extra support at higher RPM
- Cover is doweled to the housing to keep the shaft bores aligned
- Screw-in plug holds the relief valve spring instead of a pin
- Housing and cover are CNC machined and phosphate coated
Quick facts
- Part: Melling 10555ST oil pump
- Also called: engine oil pump
- Fits: 1988-1999 Chevrolet C1500 V8 5.7L and other vehicles
- Material: Cast iron housing and cover, billet steel gears, chromoly steel shaft
- Condition: New
Low oil pressure or a pressure warning light can mean a worn engine oil pump. Those signs alone do not prove the pump is at fault, since a clogged pickup screen can also cause low pressure.
Fits
This oil pump is listed for a wide range of Chevrolet, Buick, Cadillac and GMC models, including the 1988-1999 Chevrolet K1500 V8 5.7L and the 1995-2000 Chevrolet Tahoe V8 5.7L. Open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Quantity per vehicle: 1
- Inlet size and pickup tube diameter: 0.750 in (19.00 mm)
- Screen information: 3/4 bolt on/press in
- Mounting holes: 2, each 0.240 in (6.00 mm) in diameter
- Height: 4.750 in (121.00 mm)
- Width: 3.220 in (82.00 mm)
Build and materials
- Type: gear, high pressure, high volume, 25% additional volume over stock
- Gears: Shark Tooth helical, billet steel
- Housing and cover: cast iron, housing finish phosphate coating
- Shaft material: chromoly steel
- Relief spring: 70 PSI as built, with optional 58 PSI and 80 PSI springs; bypass pressure is adjustable
- Condition: New
- Country of origin: United States
In the box
One oil pump with gasket, gears, pump cover, drive shaft, intermediate shaft with steel guide, washers, hardware and alternate pressure springs. The pickup screen, timing cover and bolts are not included, so plan on new bolts. This listing is one oil pump, and each vehicle takes one.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Does the Melling 10555ST oil pump fit the 1988-1999 Chevrolet C1500 V8 5.7L?
Yes. Melling 10555ST is listed for the 1988-1999 Chevrolet C1500 V8 5.7L, the 1988-1999 Chevrolet K1500 V8 5.7L and the 1995-2000 Chevrolet Tahoe V8 5.7L. Check the "Vehicles it fits" section for other models.
Is there a Melling oil pump for 5.3L V8 engines?
Yes. Melling 10555ST is listed for some Chevrolet models with a V8 5.3L engine, as well as models with a V8 5.7L.
What springs come with this Melling high pressure oil pump?
The Melling 10555ST is built with a 70 PSI relief spring. Alternate pressure springs are included too: 58 PSI and 80 PSI.
What are the gears in this Melling shark tooth oil pump made of?
The Shark Tooth helical gears are billet steel. They run in a cast iron housing and cover, with a chromoly steel shaft.
Is each Melling high volume oil pump tested?
Yes. Each Melling high performance oil pump, including the 10555ST, is individually tested for pressure and flow under actual engine operating conditions.
