Apeixoto AP3622S In-Tank Fuel Pump & Sending Unit for 1996–1997 Chevy/GMC C/K 1500–3500 — OE Fit, Tested Flow

The Apeixoto AP3622S is a direct-replacement in-tank electric fuel pump and sending unit engineered to restore reliable fuel delivery for 1996–1997 Chevy and GMC C/K 1500–3500 trucks.

If your classic C/K truck is showing symptoms like hard starts, sputtering under load, or an inaccurate fuel gauge, this OE-style fuel pump assembly offers a complete swap-in solution. Built to match factory dimensions and electrical interfaces, the unit replaces the Airtex E3622S and equivalent OE numbers so you can reinstall with minimal modification. Apeixoto focuses on tested fitment, consistent flow characteristics, and a one-year parts warranty to reduce downtime and uncertainty during the repair.

How does this pump match my 1996–1997 Chevy/GMC fuel system?

The AP3622S is manufactured to OE specifications for mounting, sending unit calibration, and electrical connection, enabling a straightforward replacement. It fits the C1500, C2500, C3500, K1500, K2500, and K3500 models equipped with 4.3L, 5.0L, 5.7L, and 7.4L engines.

• Direct interchange for Airtex E3622S, XL3Z-9H307-BB, PFS105, 950-0172
• Same flange pattern and harness plug as original equipment
• Calibrated fuel level sending unit compatible with factory gauge readings
• Designed for in-tank installation and standard fuel line fittings

What performance and durability can I expect from this assembly?

Apeixoto supplies each pump fully tested before shipping to ensure correct flow and pressure characteristics. The assembly uses components chosen for long service life under normal driving conditions, and the product is backed by a 365-day unlimited-mile warranty.

• Pre-shipment testing for electrical and flow performance
• Durable motor and filter components to resist contamination
• OEM-style regulator and pressure output suited for stock fuel systems
• One-year parts warranty with customer support response within 24 hours

How difficult is the install and what should I prepare?

Installation is intended as a direct replacement and can be completed with common tools if you have basic mechanical skills. You should relieve fuel system pressure, disconnect the battery, and follow vehicle-specific lifting or access procedures for the in-tank unit.

• Basic hand tools and possibly a fuel tank support or lift
• Prepare to catch residual fuel and use appropriate safety precautions
• Verify connector polarity and secure all fittings before testing
• Follow OEM torque specs and gasket/seal replacement recommendations

Will this unit fix fuel gauge or starting issues?

Yes — if symptoms stem from a failing pump or inaccurate sending unit, replacing the assembly typically restores normal starting, idle stability, and fuel level readings. However, diagnose electrical circuits, filters, and related components first to ensure the pump assembly is the root cause.

• Replaces both pump and sending unit to address combined symptoms
• Helps eliminate low-pressure-related stumbling and hard starts
• Calibrated sender to improve fuel gauge accuracy when failing
• Does not replace clogged fuel lines or external fuel filter issues

Who is this for: Mechanics, restoration enthusiasts, and truck owners who need a reliable, direct-fit replacement for the in-tank fuel pump and sending unit on 1996–1997 Chevy and GMC C/K trucks. Choose this assembly if you want OE-style fitment, straightforward installation, and a tested part backed by a one-year warranty — and always confirm vehicle compatibility before purchase.