Delphi FP10021 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE-Style Repair

Restore consistent fuel delivery with this Delphi fuel injection pressure regulator, part number FP10021. Built with a metal body and a returnless outlet design, it is a direct-fit style replacement for many GM trucks, SUVs, and performance applications that use a side-mounted vacuum port, first design regulator.

Delphi draws on OE heritage and decades of supplier experience, bringing factory-level engineering knowledge to aftermarket fuel system components. For Silverado 1500, Sierra 1500, Tahoe, Yukon, and related applications, FP10021 supports stable fuel pressure control in the fuel injection system.

Key Features

• Metal construction for fuel system durability
• Push-in inlet type with clamp mounting
• Returnless outlet type for supported applications
• Single inlet and single outlet configuration
• No gauge port and non-adjustable design
• Inlet port diameter: 0.98 in. / 25.0 mm
• Delphi FP10021 fuel injection pressure regulator

Detailed Description

The Delphi FP10021 fuel injection pressure regulator is engineered for vehicles that require a side-mounted vacuum port, first design regulator. It is listed across a wide range of Chevrolet, GMC, Cadillac, Buick, Hummer, Isuzu, and Pontiac applications, including 1996-2005 Chevrolet Silverado 1500, 2000-2005 Chevrolet Tahoe, 1999-2005 GMC Sierra 1500, and 2002-2003 Cadillac Escalade. This part number also appears in performance and truck platforms such as Chevrolet Camaro, Pontiac Firebird, and GMC Savana models.

This part cross-references Four Seasons 24027 and Gates 24084 for the same application. The FP10021 is a practical choice when replacing a worn regulator that can affect fuel pressure consistency, idle quality, and drivability.

What This Part Helps Address

• Fuel pressure that is too high or too low
• Hard starting caused by inconsistent fuel delivery
• Rough idle or hesitation under load
• Fuel trim issues related to regulator wear
• Driveability concerns on GM fuel injection systems

Installation Notes and Fitment

Compatible with vehicles that use the listed side-mounted vacuum port, first design configuration. Fits 2003-2005 Chevrolet Silverado 1500, N/A; Fits 1999-2000 Chevrolet Silverado 1500, N/A; Fits 2003-2005 Chevrolet Tahoe, N/A; Fits 2000 Chevrolet Tahoe, N/A; Fits 2003-2005 GMC Sierra 1500, N/A; Fits 1999-2000 GMC Sierra 1500, N/A; Fits 2003-2005 GMC Yukon, N/A; Fits 2000 GMC Yukon, N/A; Fits 2004 Buick Rainier, N/A; Fits 2003-2004 Chevrolet SSR, N/A; Fits 2003-2004 Chevrolet Trailblazer EXT, N/A; Fits 2003-2004 GMC Envoy XL, N/A; Fits 2004 GMC Envoy XUV, N/A; Fits 2003-2004 Isuzu Ascender, N/A; Fits 2002-2003 Cadillac Escalade, N/A; Fits 2003 Cadillac Escalade ESV, N/A; Fits 2002-2003 Cadillac Escalade EXT, N/A; Fits 2003 Chevrolet Avalanche 1500, N/A; Fits 2002-2003 Chevrolet Avalanche 2500, N/A; Fits 2003 Chevrolet Express 1500, N/A; Fits 2003 Chevrolet Express 2500, N/A; Fits 1996-2003 Chevrolet Express 3500, N/A; Fits 2001-2003 Chevrolet Silverado 1500 HD, N/A; Fits 1999-2003 Chevrolet Silverado 2500, N/A; Fits 2001-2003 Chevrolet Silverado 2500 HD, N/A; Fits 2001-2003 Chevrolet Silverado 3500, N/A; Fits 2003 Chevrolet Suburban 1500, N/A; Fits 2000 Chevrolet Suburban 1500, N/A; Fits 2000-2003 Chevrolet Suburban 2500, N/A; Fits 2003 GMC Savana 1500, N/A; Fits 2003 GMC Savana 2500, N/A; Fits 1996-2003 GMC Savana 3500, N/A; Fits 2001-2003 GMC Sierra 1500 HD, N/A; Fits 1999-2003 GMC Sierra 2500, N/A; Fits 2001-2003 GMC Sierra 2500 HD, N/A; Fits 2001-2003 GMC Sierra 3500, N/A; Fits 2003 GMC Yukon XL 1500, N/A; Fits 2000 GMC Yukon XL 1500, N/A; Fits 2000-2003 GMC Yukon XL 2500, N/A; Fits 2003 Hummer H2, N/A; Fits 2002 Cadillac Escalade, N/A; Fits 2002 Chevrolet Avalanche 1500, N/A; Fits 2001-2002 Chevrolet Silverado 1500, N/A; Fits 2001-2002 Chevrolet Suburban 1500, N/A; Fits 2001-2002 Chevrolet Tahoe, N/A; Fits 2001-2002 GMC Sierra 1500, N/A; Fits 2001-2002 GMC Yukon, N/A; Fits 2001-2002 GMC Yukon XL 1500, N/A; Fits 1998-2001 Chevrolet Camaro, N/A; Fits 1998-2001 Pontiac Firebird, N/A; Fits 1996-2000 Chevrolet C2500, N/A; Fits 1996-2000 Chevrolet C3500, N/A; Fits 1996-2000 Chevrolet K2500, N/A; Fits 1996-2000 Chevrolet K3500, N/A; Fits 1996-2000 GMC C2500, N/A; Fits 1996-2000 GMC C3500, N/A; Fits 1996-2000 GMC K2500, N/A; Fits 1996-2000 GMC K3500, N/A; Fits 1996-1999 Chevrolet C2500 Suburban, N/A; Fits 1996-1999 Chevrolet K2500 Suburban, N/A; Fits 1996-1999 Chevrolet P30, N/A; Fits 1996-1999 GMC C2500 Suburban, N/A; Fits 1996-1999 GMC K2500 Suburban, N/A; Fits 1996-1999 GMC P3500, N/A.

Quality Assurance

Delphi builds aftermarket fuel system parts using OE experience and engineering knowledge developed through long-term supplier relationships with major automakers. FP10021 reflects that OE-focused approach for fuel pressure regulation service.