KPALAG Fuel Pressure Regulator 3.8BAR Direct-Fit Replacement with Clip & Snap Ring, Stainless Steel

KPALAG's 3.8BAR fuel injection pressure regulator is a direct-fit replacement part that restores correct fuel rail pressure for compatible GM vehicles and comes complete with a snap ring and retaining clip.

This OEM-style regulator is machined from stainless steel with a durable fluororubber O-ring set to resist oil and oxidation. It replaces GM part numbers 19236428 and 2173299 and was engineered to match factory dimensions so it installs without modification on the listed Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu and Pontiac models. The unit ships with the metal snap ring and quick-release clip needed for a secure mounting.

Which vehicles and engines will this regulator work with?

The KPALAG regulator covers a wide range of GM platforms from the late 1990s through the mid-2000s. It fits multiple full-size trucks, SUVs and passenger cars equipped with the matching fuel systems where the original part numbers 19236428 or 2173299 were used.

• Buick: Lesabre, Park Avenue, Regal (3.8L 2001–2005 / 2001–2004)
• Cadillac/Chevrolet/GMC: Escalade, Avalanche, Silverado, Sierra, Yukon, Suburban, Express, Savana (various 4.8L–8.1L 1996–2005)
• Also compatible with Hummer H2, Isuzu Ascender/NPR, Pontiac Bonneville/Grand Prix on listed years
• Direct replacement for GM part numbers 19236428 and 2173299

How is the KPALAG regulator built and what materials are used?

This regulator body is produced from corrosion-resistant stainless steel to withstand fuel exposure and mechanical wear. The sealing O-rings are fluororubber, chosen for long-term resistance to gasoline and oxidation.

• Stainless-steel housing for strength and corrosion resistance
• Fluororubber O-rings for improved oil and chemical durability
• Precision machining to maintain factory fit, form and function
• Ships with metal snap ring and retaining clip for secure installation

What tools or steps are needed to install this fuel pressure regulator?

Installation is straightforward for a technician or DIYer familiar with fuel-rail service. The regulator is manufactured to factory dimensions, so it should slide into the fuel rail bore after removing the OEM unit; light lubricant on the O-rings helps prevent pinching during insertion.

• Relieve fuel pressure before removing the old regulator
• Apply a thin coat of engine-safe lubricant to the O-rings for easier seating
• Use the supplied snap ring and clip to secure the regulator in place
• Inspect for leaks and verify fuel pressure after installation

What comes in the box and what should I inspect before installation?

KPALAG supplies the regulator with the two retention parts you'll need to mount it correctly. Verify the part numbers, check O-ring condition, and confirm the snap ring and clip match the rail groove before starting the job.

• 1 × Fuel injection pressure regulator (3.8BAR specification)
• 1 × Snap ring and 1 × retaining clip included
• Confirm compatibility with vehicle VIN or factory part number 19236428/2173299
• Check O-rings for correct size and smooth surface before installation

Who is this for? This KPALAG fuel injection pressure regulator is intended for mechanics, fleet technicians and experienced DIYers needing an exact-fit replacement for GM vehicles listed in the compatibility notes. Choose this part if you require a corrosion-resistant, factory-dimension regulator with the retaining hardware included for a clean, reliable repair of the fuel rail system.