CULMKARI Fuel Injection Pressure Regulator for Chevy & GMC 1999–2004 with Vacuum Line — Direct-Fit Replacement

The CULMKARI Fuel Injection Pressure Regulator with vacuum line replaces OE part numbers like 17113556 and 89060418 to restore correct fuel pressure delivery on compatible GM trucks and SUVs.

This precision-molded regulator controls fuel rail pressure and includes the vacuum connection required by your engine management system. It is designed as a direct-fit replacement for a broad range of GM vehicles from the late 1990s through the early 2000s, saving you time in installation and helping re-establish stable fuel delivery when the original unit has worn or failed.

Which vehicles and engine sizes does this regulator fit?

This regulator covers many Chevrolet, GMC, Cadillac, Isuzu and Buick models across multiple model years and engine displacements. Referencing OE numbers included below ensures compatibility with specific chassis and engine combinations.

• Chevrolet: Avalanche 1500 (2002–2003 5.3L); Silverado 1500/2500/3500 across 1999–2003 with 4.8L, 5.3L, 6.0L where listed.
• GMC/Sierra: Sierra 1500/2500/3500 and Envoy (2003–2004) coverage for listed engines.
• Other brands: Cadillac Escalade, Buick Rainier, Isuzu Ascender, H2 and Savana vans as specified.
• Part numbers: 17113556, 89060418, 12583236, 17113660, 19245529, 2171439, 2171590 for cross-reference.

How does installation compare to an OE replacement?

Installation is intended to be straightforward: the regulator is built to match OE mounting points and vacuum fittings, reducing modification or additional adapters. Typical swap requires basic hand tools and minimal disassembly of the fuel rail area.

• Direct-fit housing and vacuum port for plug-and-play replacement.
• Maintains original fuel line alignment and mounting locations.
• Compatible with stock fuel rails and connectors on listed models.

What performance and reliability features should I expect?

The unit is manufactured to meet functional tolerances for pressure regulation and vacuum response so your fuel system can maintain proper delivery during varying engine loads. While it’s not a performance upgrade, it restores OEM-style fuel pressure control when the factory regulator no longer performs correctly.

• Engineered to control fuel rail pressure within expected OEM ranges.
• Molded vacuum line connection for consistent diaphragm response.
• Built for corrosion resistance and repeatable operation under typical driving conditions.

Are there technical support or warranty options available?

CULMKARI provides responsive technical support from an experienced team to help with part selection and fitment questions. Check the seller page for any available warranty or return terms before purchase.

• Quick-response tech support for fitment and installation guidance.
• Cross-reference OE part numbers to confirm application before ordering.
• Seller-specific warranty/return policy details available on the product page.

Who is this for: This CULMKARI regulator is suited for DIY mechanics and professional technicians working on late-1990s to early-2000s GM trucks and SUVs that require a direct-fit replacement for a failing fuel pressure regulator. Choose this part if your vehicle matches the listed models and engine sizes and you want a replacement that matches OE form, fit, and vacuum connection for straightforward installation and dependable pressure control.