BCBC IS-55H Engine Oil Pump Intermediate Shaft

Engine Oil Pump Intermediate Shaft

This Melling engine oil pump intermediate shaft is a standard replacement part for stock applications that use the IS-55H design. It is made in the USA and built from stress proof steel to handle the demands of oil pump operation in Chevrolet, GMC, and Hummer applications.

Part number IS-55H is used across a wide range of GM truck, van, SUV, and utility platforms. If you are replacing an oil pump on a Chevrolet C1500, GMC K2500, or Chevrolet Blazer, this shaft provides the correct intermediate connection for the pump assembly.

• Standard replacement oil pump intermediate shaft
• Stress proof steel construction for added strength
• Made in the USA
• Length: 8.310 in. with 0.312 in. shaft diameter
• Fits stock applications using the IS-55H configuration

Detailed Fitment Coverage

Compatible with a broad range of Chevrolet and GMC truck, van, SUV, and chassis applications, including Fits 1988-1998 Chevrolet C1500, N/A; Fits 1988-2000 Chevrolet C2500, N/A; Fits 1982-1986 Chevrolet K10, N/A; Fits 1994-1999 Chevrolet Tahoe, N/A; Fits 1996-2002 Chevrolet Express 2500, N/A; Fits 1988-1997 GMC C1500, N/A; Fits 1988-2000 GMC K3500, N/A; Fits 1994-2001 AM General Hummer, N/A; and Fits 1982-1999 Chevrolet P30, N/A. This part number IS-55H also covers additional stock applications listed in the fitment data for Chevrolet and GMC platforms.

What It Is Used For

• Replacing a worn or damaged oil pump intermediate shaft
• Restoring proper oil pump drive connection
• Addressing shaft fatigue, cracking, or twisting damage
• Completing an oil pump replacement with a new shaft

Installation Notes and Tips

Use this shaft when servicing the oil pump assembly on stock applications that call for the IS-55H design. Inspect the old shaft for fatigue, cracking, or twist damage before installation, even if it appears serviceable. Verify the application by part number IS-55H and match it to the vehicle's oil pump configuration before assembly.

Quality Assurance

Melling recommends replacing the shaft whenever a new oil pump is installed. The stress proof steel construction and standard replacement design support consistent service in domestic and import pump applications.