Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu
ALLIANT POWER

Alliant Power AP53903 Reman Injector | 05-07 GMC & Isuzu

SKU: APP4521 UPC: 843497101948
In stock - 141 items available
$534.85
+ $156 refundable core – see Core Returns
RemanufacturedRefundable Core Charge Applies

How Core Charges Work

This part carries a $156.00 refundable core charge, added to your order at checkout. Return your old part and we refund it to your original payment method.

What is a core?

A core is your original used part — the one this new or remanufactured unit replaces. The core charge keeps rebuildable parts in circulation and keeps prices down for everyone.

Core charge refund timeline

Based on when we receive your core:

  • 0 – 21 days100% refund
  • 22 – 60 days80% refund
  • 61 – 90 days50% refund
  • Over 90 daysNot guaranteed — at DFIS's discretion

All cores are inspected on arrival. Incomplete, damaged or non-rebuildable cores may be denied credit or receive partial credit at our discretion. Refunds are processed within 3–7 business days after inspection.

How to return your core

  1. Download the Core Return Slip and fill in your order and part information.
  2. Drain all fluids (oil, fuel, coolant) from the core.
  3. Reinstall any plugs or caps that came with the new part.
  4. Wrap the core in a plastic bag so it can't leak, then pack it — in the new part's original box if you still have it — and secure it so it can't shift.
  5. Put the completed slip inside the box.
  6. Ship via UPS, FedEx, USPS or freight for large items. Insurance is recommended on high-value cores.
  7. Email your tracking number to returns@dfispdx.com.

Important: a core refund can't be guaranteed without the completed slip inside the package and a tracking number.

Cores we can't accept

  • Severely rusted or damaged beyond reuse
  • Missing critical components
  • Not drained of fluids
  • Improperly packaged or leaking

Core department: returns@dfispdx.com  ·  503-235-1947

Full RMA & Core Returns Policy

Have a question about this part? We'll answer it.

Shipping PolicyRMAs and Core ReturnsQuestions? Call (503) 235-1947

Verified Fitment & Application Support

This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.

Got Questions? Feel free to email us or call us at (503) 235-1947

Remanufactured Alliant Power Fuel Injector delivers the precise fuel quantity and spray pattern required for efficient combustion and proper engine operation. The remanufacturing process restores injector function to support consistent fuel delivery and dependable operation. Accurate fuel delivery supports engine performance, fuel efficiency, and emissions control.
  • Innovative Design: Cutting-edge technology tailored to enhance driving experiences.
  • Long-lasting Performance: Built to endure tough conditions and deliver reliable results over time.
  • Cost-effective Efficiency: Helps reduce maintenance costs while improving overall performance.
  • Guarantee fitment: A fit, form, and function test has been performed to ensure that the product meets and/or exceeds original equipment standards.
  • Enhanced Vehicle Efficiency: Boosts engine performance and ensures optimal fuel usage.
  • Trusted Reliability: Rigorously tested to meet industry standards for consistent, dependable use.
  • Durability and Longevity: Built with premium materials to withstand extreme conditions and provide long-lasting reliability.
  • Eco-friendly Options: Environmentally conscious designs help reduce emissions while maintaining top-tier performance.
Applications Isuzu NQR (2005-2007), Isuzu NRR (2005-2007), Isuzu NPR-HD (2005-2007), GMC W5500 Forward (2005-2007), Isuzu NPR (2005-2006), GMC W4500 Forward (2005-2007) Included in the Box
  • Reman Diesel Fuel Injector

Isuzu NQR (2005-2007)
Isuzu NRR (2005-2007)
Isuzu NPR-HD (2005-2007)
GMC W5500 Forward (2005-2007)
Isuzu NPR (2005-2006)
GMC W4500 Forward (2005-2007)

095000547, 095000-547, 0950005470, 0950005471, 095000-5471, 0950005472, 095000-5472, 0950005473, 095000-5473, 0950005474, 095000-5474, 0950005475, 095000-5475, 095000-5476, 095000-5477, 095000-5478, 095000-5479, 095000-8900, 095000-8901, 095000-8902, 095000-8903, 2411020004, 241-102-0004, 53803, 53903, 897329703, 8973297030, 8-97329-703-0, 8973297031, 8-97329-703-1, 8973297032, 8-97329-703-2, 8-97329-703-3, 8973297034, 8-97329-703-4, 8973297035, 8-97329-703-5, 8-97329703-5, 97329703, 97780100, AP53803, AP53903, DEN 0950005471, DEN0950005471, EX631124, FJ56909

Orders typically ship within 24–48 hours of being received, but because of vendor shipping times some orders may take longer. We ship within the United States only (48 contiguous states plus DC).

Shipping Height: 0.0

Shipping Length: 0.0

Shipping Width: 0.0
California Proposition 65
WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer and/or reproductive harm. For more information, visit www.P65Warnings.ca.gov.