Keep the spark firing in the right order with the Delphi Distributor Rotor DC20008. Mounted on the distributor shaft beneath the cap, the rotor carries high-voltage current from the coil and distributes it to each cap terminal in the correct firing sequence. It drops in as a direct-fit replacement across a long list of GM trucks, vans and SUVs — including the 1995-2005 Chevrolet Blazer, 1996-2005 Chevrolet Astro, 1999-2006 Chevrolet Silverado 1500, 1995-2004 Chevrolet S10, 1996-2005 GMC Safari, 1999-2006 GMC Sierra 1500, 1996-2000 GMC Yukon, 1997-2000 Isuzu Hombre and 1996-2001 Oldsmobile Bravada. See the "Vehicles it fits" section for the full list of 43 applications.
- OE-grade replacement: engineered for correct fit, form and function on the listed vehicles.
- Validated ignition design: Delphi OE-technology ignition products are validated to match the vehicle's engine management system.
- Proven materials: Delphi backs its ignition parts with proven materials to meet or exceed OE requirements.
- OE heritage: built from Delphi's long-standing OE experience with strict manufacturing quality control.
Signs the rotor may need replacing include hard starting, misfire, hesitation or stalling. If a worn or cracked distributor rotor is the cause, replacing it with DC20008 restores the spark distribution path.
Interchange: 173-8021 · 8-10452-457-0 · 8-10489-702-0 · DR-331
1738021 · 8104524570 · 8104897020 · DR331 · D465 · 4R1066 · D236 · RR256 · 10452457 · 10458111 · 1290 · RR256SB · DR975
This part cross-references / interchanges with the following part numbers:
D465, 4R1066, D236, 173-8021, RR256, 10452457, 10458111, 8-10452-457-0, 8-10489-702-0, 1290, RR256SB, DR-331, DR975
Frequently Asked Questions
What does the distributor rotor do?
It mounts on the distributor shaft and carries high-voltage current from the coil, distributing it to each cap terminal in the engine's firing order.
Will this fit my vehicle?
The DC20008 is a direct-fit replacement for 43 GM, Isuzu and Oldsmobile applications, such as the 1995-2005 Chevrolet Blazer and 1999-2006 GMC Sierra 1500. Check the "Vehicles it fits" section for the full list.
What are signs the rotor needs replacing?
Hard starting, misfire, hesitation or stalling can point to a worn or cracked rotor. Diagnose the cause first, since these symptoms can have other sources.
Should I replace the distributor cap at the same time?
Many technicians replace the cap and rotor together as a matched service since they wear as a pair, but this listing is for the rotor only.
What other part numbers does this replace?
It interchanges with numbers including 173-8021, 8-10452-457-0, DR-331, D465, 4R1066, D236, RR256, 10452457, 10458111, 1290, RR256SB and DR975.
