GM Vortec 4.8 / 5.3 / 6.0L V8 Truck Fuel Injector Cleaning & Flow Testing

The Delphi 25317628 is a MPFI (port injection) fuel injector used in GM Vortec 4.8L (LR4), 5.3L (LM7), 6.0L (LQ4) V8 trucks and SUVs (1999-2007): Silverado 1500/2500/3500, Sierra, Tahoe, Yukon, Suburban, Avalanche, Escalade, Express, Savana, Hummer H2. We ultrasonic-clean and flow-test injectors like this one in our shop, then send back before-and-after data so you know exactly what you're getting.

Manufacturer	Delphi
Part number	25317628
Type	MPFI (port injection)
Connector	EV6 (Delphi Multec 2 shorty, 2-hole conical spray)

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Our measured results

These are the actual before-and-after numbers from our flow bench for the Delphi 25317628 — not published estimates.

Tested in our shop	8 injector(s) @ 40.0 psi
Measured coil (avg)	12.95 Ω
10s open flow (avg)	38.0 → 38.75 ml (+2.0%)
60s pulsed flow (avg)	40.62 → 41.25 ml
Leak test after cleaning	8/8 PASS

Also known as / cross-references

The Delphi 25317628 is interchangeable with or cross-references to these part numbers:

171136982532028725323974Delphi FJ10062

What vehicles use the Delphi 25317628?

GM Vortec 4.8L (LR4), 5.3L (LM7), 6.0L (LQ4) V8 trucks and SUVs (1999-2007): Silverado 1500/2500/3500, Sierra, Tahoe, Yukon, Suburban, Avalanche, Escalade, Express, Savana, Hummer H2

How we service it

Every injector gets ultrasonic cleaning, backflushing, before-and-after flow testing (static and dynamic), leak testing, spray-pattern inspection, and new O-rings and micro-filter baskets where available — plus a detailed Injector Performance Report. Round-trip USPS shipping is $15 flat.

Frequently asked questions

What vehicles use the Delphi 25317628 injector?

The Delphi 25317628 is used in GM Vortec 4.8L (LR4), 5.3L (LM7), 6.0L (LQ4) V8 trucks and SUVs (1999-2007): Silverado 1500/2500/3500, Sierra, Tahoe, Yukon, Suburban, Avalanche, Escalade, Express, Savana, Hummer H2.

Can you clean and test a 25317628 injector?

Yes. We ultrasonic-clean, backflush, and flow-test the Delphi 25317628 on our bench, including before-and-after open and pulsed flow, leak testing, and spray-pattern inspection, with new O-rings where available.

What did the 25317628 flow at?

On our bench, 8 25317628 injectors averaged 38.0 ml open flow before cleaning and 38.75 ml after, tested at 40.0 psi.

How much does it cost?

Standard MPFI top-feed injectors are $30 each; side-feed, GDI, TBI and specialty injectors are $35 each. Round-trip shipping is $15 flat, 4-injector minimum.

How do I send them in?

Start an order on our Get Started page, ship your injectors to our Weymouth, MA shop, and we return them cleaned, tested, and documented.

Send in your 25317628 injectors

Mail-in cleaning and flow testing with a full before/after report. 4-injector minimum, $15 flat round-trip shipping.

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