Delphi EX634761 fuel injector for the 2004-2006 GMC C8500 Topkick 6-cylinder 7.2L and other vehicles delivers diesel fuel into the engine as a controlled spray. Delphi diesel injectors are built to OE specifications for fit, form and function, and all Delphi injectors are tested using OE methodologies.
- 100% O-ring replacement
- Injector with no internal seal rings, to minimize leakage
- Recessed fuel exit to minimize possible plugging
- Reduced spray variation and an accurate fuel spray pattern that help with emissions and cold starting
- Draws manifold heat away from the fuel rail to eliminate hesitation from vapor lock
Quick facts
- Part: Delphi EX634761 fuel injector
- Fits: 2004-2006 GMC C8500 Topkick 6-cylinder 7.2L and other vehicles
- Condition: New
A worn or leaking injector can show up as hard cold starts, rough running or hesitation, but other fuel-system faults cause the same signs, so pin down the cause before you buy. With the engine off and cool, a look for fuel wetness around the injector is a fair first check, and a shop can test spray and balance.
Fits
This injector is a direct-fit replacement for the 2004-2006 GMC C8500 Topkick 6-cylinder 7.2L, the 2008-2009 Roadmaster Rail AE-Stacked Rail 6-cylinder 7.2L and the 2004-2009 Chevrolet C6500 Kodiak 6-cylinder 7.2L. If your truck or bus is not named here, look up its make, model and years in the "Vehicles it fits" section. This listing is one injector, and the 2004-2006 GMC C8500 Topkick 6-cylinder 7.2L takes six.
Specifications
Fit and size
- Quantity per vehicle: 6
- Engine: L6-7.2L
- System type: Medium Duty
Build and materials
- Condition: New
- Trim code: CD
In the box
One fuel injector with four O-rings located on the injector, and an instruction sheet.
Interchange: 10R-4761 · 222-5959 · 222-5961 · 233-3536 · 236-0973 · 241-3238 · 243-4502 · 295-1408 · 328-2583 · 387-9430
20R8057
This part cross-references / interchanges with the following part numbers:
10R4761, 10R-4761, 20R8057, 222-5959, 222-5961, 233-3536, 236-0973, 241-3238, 243-4502, 295-1408, 328-2583, 387-9430
Frequently Asked Questions
Is the Delphi EX634761 injector right for the 2004-2009 Chevrolet C6500 Kodiak 6-cylinder 7.2L?
Yes. Delphi EX634761 fits the 2004-2009 Chevrolet C6500 Kodiak 6-cylinder 7.2L, which takes six injectors. Other trucks and buses are covered in the "Vehicles it fits" section.
Does this injector come with O-rings?
Yes. The package holds one injector with trim code CD, four O-rings located on the injector and an instruction sheet.
Is this Delphi fuel injector made for medium-duty diesel engines?
Yes. Its system type is Medium Duty, and the fitment covers trucks and buses with the L6-7.2L engine.
How does this Delphi injector deal with vapor lock?
It thermally isolates fuel from the engine by drawing manifold heat away from the fuel rail, which is how it avoids hesitation from vapor lock.
Does Delphi EX634761 interchange with 20R8057?
Yes. 20R8057 is one of the interchange numbers listed for Delphi EX634761.
