Grezuton Starter for GM 4.8L/5.3L V8 Trucks & SUVs (2003–2008) — Direct-Fit, OE-Style Replacement

Grezuton replacement starter engineered to fit select 2003–2008 GM V8 trucks and SUVs, providing direct-fit installation and reliable cranking for 4.8L and 5.3L engines.

This Grezuton starter is a direct-replacement unit built to match OE mounting, electrical connections, and gear engagement for many Chevrolet, GMC, Cadillac, Buick, Isuzu and Saab vehicles. It’s offered with factory-direct pricing and a one-year unlimited-mileage replacement warranty, making it a practical option for owners who need dependable starting performance without dealership markup. Before ordering, confirm compatibility using the vehicle list and reference numbers supplied.

Which vehicles does this starter fit?

This starter covers a broad range of GM V8 applications from the early-to-late 2000s and several related rebadged SUV platforms. Compatibility includes many Silverados, Sierras, Tahoes, Suburbans, Avalanches, Yukon models, and select Express/Savana vans as well as Buick, Isuzu and Saab counterparts.

• Chevrolet: Silverado 1500 (2003–2008), Tahoe/Suburban (2003–2008), Avalanche (2003–2008), TrailBlazer variants
• GMC: Sierra 1500 (2003–2008), Yukon/Yukon XL (2003–2008), Envoy, Savana vans
• Cadillac & Buick: Escalade (2003–2005), Rainier (2004–2007); also Isuzu Ascender and Saab 9-7x
• Check part references: 6494N, 12568051, 12578050, 12604477, 89017440, 8000045, and related numbers

How straightforward is the installation and what should I expect?

The Grezuton starter is manufactured to match OE bolt pattern, pinion engagement, and electrical terminals so a mechanic can swap units without modification in most cases. Typical installation takes 1–2 hours depending on vehicle access and tools available. Always disconnect the battery before work and follow vehicle-specific service instructions.

• Direct-fit mounting and OEM-style electrical connectors
• Same nose, pinion, and flange alignment as original equipment
• Commonly swapped with hand tools; battery disconnection required
• Verify starter orientation and torque specs from factory manual

What quality assurances and return options come with the starter?

Grezuton supplies this starter with a one-year unlimited-mileage free-replacement guarantee to address manufacturing defects or early failure. The item is priced factory-direct to reduce cost while still offering customer support if any fitment or performance issue arises. Keep order documentation and check the unit upon arrival for physical damage before installation.

• 1-year unlimited-mileage replacement coverage
• Factory-direct pricing—no middleman markup
• Customer support available for fitment and troubleshooting
• Inspect package and part on delivery; retain receipts

Which reference numbers and part IDs should I compare before buying?

Cross-reference the starter part numbers stamped on your original unit or shown in parts diagrams to ensure correct selection. Grezuton lists multiple OE and aftermarket reference IDs that commonly match this model; confirming these numbers prevents returns and installation delays.

• Common references: 6494, 6494N, 12568051, 12578050, 12592294, 12604477
• Additional IDs: 89-01-7440, 89-01-7631, 89017440, 89017631
• Alternate distributor references: 8000016, 8000045, 8000150
• Match the physical connector and mounting flange to your original starter

Who is this for: This Grezuton starter is aimed at DIY mechanics and professional technicians replacing a failing starter in compatible 2003–2008 GM V8 trucks, SUVs, and vans who want an affordable, direct-fit unit backed by a one-year replacement policy. It’s also suitable for fleet managers or restoration projects that require accurate OE-style fitment without dealership prices. Always verify vehicle year, engine size, and part references before purchase.