Fuel Pump Assembly for Chevy Silverado GMC Sierra 1999-2003

In this review the Fuel Pump Assembly for Chevrolet Silverado and GMC Sierra is evaluated for owners who need a direct OE-style replacement for model years 1999 through 2004. The bottom line: this assembly is aimed at DIY mechanics and repair shops that want an all-in-one unit that includes a pressure sensor and wiring to replace worn or failed in-tank pumps. The single biggest reason to buy is the complete replacement package that matches many OE part numbers, making installation straightforward when the vehicle needs a new pump and sender.

Key Features

• Complete kit: Ships with pump, sending unit, seal ring and wiring harness so most installations do not require sourcing extra parts.
• Pressure sensor included: The built-in pressure sensor replaces the original sensor and preserves fuel pressure monitoring on compatible California emission systems.
• Extensive fitment: Covers Silverado and Sierra 1500 and 2500/3500 models across 4.3L to 8.1L engines for late 1990s and early 2000s GM trucks, reducing risk of misfit purchases.
• OE part compatible: Designed to replace multiple OE numbers, which helps with fit and connector alignment when matching factory replacements.
• New electrical connector: Supplies a revised connector shape to address known OE connector corrosion and pin issues, improving long-term electrical reliability when installed correctly.

Who It's For

This assembly is best for owners of Chevrolet Silverado or GMC Sierra trucks from about 1999 to 2004 who need a full in-tank pump replacement and prefer a single purchase that includes pump, sender, harness and pressure sensor. It suits DIYers comfortable with dropping the tank or accessing the in-tank module and swapping electrical connectors if the vehicle still has the original harness.

It is less suitable for someone who only needs a single spare part such as a standalone pressure sensor or pump module without the harness, or for very early or much newer GM models outside the listed fitment years. Professional installers and shops will appreciate the OE part cross-reference list for quick identification.

Pros & Cons

Pros

• Comes as a full replacement kit, reducing time spent hunting parts.
• Includes a pressure sensor so emission-system vehicles retain proper monitoring.
• Matches many OE part numbers, improving the likelihood of correct fitment.
• New connector addresses common OE failure points due to corrosion and cracked housings.

Cons

• Some customers report mixed functionality results, so installation and initial testing are important.
• Vehicles with the original external harness may require replacing or modifying the connector to mate with the new shape.

Specifications

Fitment	Chevy Silverado and GMC Sierra 1500/2500/3500, 1999-2004 (varies by engine)
Supported engines	4.3L V6, 4.8L V8, 5.3L V8, 6.0L V8, 8.1L V8
Included components	Pump, sending unit, seal ring, wiring harness, 4 wire connectors, float, pressure sensor
OE replacements	Replaces part numbers such as 19331263, 19369913, 19153711 and others
Emission system	California emission system compatible (pressure sensor equipped)
Connector notes	New connector shape supplied; may require harness replacement or connector swap

Our Verdict

The Fuel Pump Assembly is a practical, value-focused replacement for late 1990s and early 2000s Silverado and Sierra trucks that need a full in-tank swap with pressure sensing. It offers a complete kit and OE cross-reference convenience, making it a sensible choice for DIY repairs or shop installs, though buyers should be prepared to address connector differences and verify operation after installation.

Frequently Asked Questions

Will this fit my 2003 Silverado 1500 5.3L?
Yes, the assembly lists fitment for Silverado 1500 5.3L V8 models from 1999-2003, but confirm engine and year before ordering.

Does the kit include a pressure sensor?
Yes, the package includes a pressure sensor for California emission systems.

Do I need to change my vehicle harness?
If your original connector is the older shape you may need to replace or swap the external harness connector to match the new connector supplied.