Apeixoto Fuel Pump Module Assembly for 1988–1995 GMC C/K Trucks AP3621S — OE Fit, Pre-Tested

Apeixoto AP3621S is a direct-replacement fuel pump module engineered to restore reliable fuel delivery for 1988–1995 GMC C1500/C2500/C3500 and K1500/K2500/K3500 trucks.

If your classic C/K-series GMC is showing signs of poor fuel pressure, stalling, or difficulty starting, a worn fuel pump module often sits at the root of the problem. The Apeixoto AP3621S fuel pump module assembly is built to match OE specifications and work as a drop-in replacement for the listed model years. It’s tested before shipping and backed by a 60-day return policy plus a one-year replacement warranty, helping you get back on the road with minimal downtime.

How does this pump match my truck’s original equipment?

The AP3621S is manufactured to OE-style dimensions and electrical connections so it fits into the existing fuel tank opening and wiring harness. It replaces widely used OE part numbers from AIRTEX, CARTER, DELPHI, and GM, ensuring compatibility with the listed C/K models.

• Designed to match OE fit and mounting points for 1988–1995 GMC C/K trucks
• Compatible with OE part numbers: AIRTEX:E3621S, CARTER:P8000S, DELPHI:HP10000, GM:25028611
• Standard electrical connector and fuel outlet locations

What performance and quality checks does Apeixoto perform?

Each module is inspected and tested prior to shipping to confirm proper electrical function and pump operation. While not an OEM unit, it is built to provide reliable fuel flow and durable service life comparable to the original assembly when installed correctly.

• Pre-shipment testing of pump motor and sender operation
• Durability-focused components designed for vehicle use
• Quality control to reduce fitment and functional issues

How difficult is installation and what should I expect?

Installation is straightforward for anyone experienced with fuel-tank-level repairs: the module installs in the same orientation and uses stock mounting hardware. Basic tools and safety precautions—relieving fuel pressure, working in a well-ventilated area, and avoiding sparks—are required.

• Drop-in replacement using the original tank opening and fasteners
• No special calibration needed—electrical plug and sender connect like OEM
• Refer to factory service guide for torque specs and safe removal

What warranty and return options are included?

Apeixoto supports this fuel pump module with a 60-day free return window and a 365-day free replacement warranty. Customer support is available if you encounter issues during installation or operation to help resolve fitment or performance concerns.

• 60 days for returns if the part doesn’t meet expectations
• One-year replacement warranty for functional failures
• Customer assistance for troubleshooting and replacement guidance

Who is this for: The AP3621S fuel pump module assembly is intended for owners and mechanics restoring or maintaining 1988–1995 GMC C1500, C2500, C3500, K1500, K2500, and K3500 trucks who need a reliable, OE-compatible replacement. It fits drivers who prefer a tested aftermarket module that installs like the original, offers clear compatibility with common OE part numbers, and includes short-term returns plus a one-year replacement warranty for added peace of mind.