2004.5-2005 Chevy/GMC 6.6L Duramax LLY VGT Vane Position Sensor Adapter | Garrett 771864-0001 New
This is the Garrett 771864-0001, a new vane position sensor (VPS) adapter for the variable geometry turbo.
Garrett’s Duramax turbo guide says the LLY, model years 2004 to 2005, requires the 771864-0001 vane position sensor adapter. The same guide lists Garrett turbo 848212-5001S (GT3788VA) for the 2004 to 2010 Duramax.
Alliant’s page names the 2004 to 2005 Silverado and Sierra 2500 HD, the 2004 to 2006 Sierra 3500, and the 2004 to 2005 Kodiak and Topkick C4500 and C5500.
Confirm Fitment Before You Order
Garrett’s note names the LLY only. Check the engine code on your truck (8th digit of the VIN) before you order. Call 530-668-0818 and we will confirm the exact match at no charge before anything ships.
Specifications
| Part number | 771864-0001 |
| Brand | Garrett |
| Condition | New, genuine, in original packaging |
| Warranty | Manufacturer’s own warranty applies. Call us and we handle the claim. |
| Type | VGT vane position sensor (VPS) adapter |
| Engine | 6.6L Duramax LLY, model years 2004 to 2005, per Garrett |
| For turbo | Garrett 848212-5001S (GT3788VA) |
| Quantity | One per turbo |
| Shipping weight | 0.1 lb |
Fits / Applications
- 6.6L Duramax LLY, model years 2004 to 2005, with Garrett turbo 848212-5001S
- Trucks Alliant names: Silverado and Sierra 2500 HD (2004 to 2005), Sierra 3500 (2004 to 2006), Kodiak and Topkick C4500 and C5500 (2004 to 2005)
Follow the workshop manual for your engine when you fit this part.
Part Numbers & Cross Reference
Garrett 771864-0001. Alliant lists DT660029 as a substitute part.
Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.
Frequently Asked Questions
Do I need it?
Garrett says the LLY (model years 2004 to 2005) requires this adapter. Garrett’s note names the LLY only.
Will it fit my truck?
Call 530-668-0818 with your VIN and we will confirm it.
Related Parts
Why Buy From Valley Fuel Injection
We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. Call us with your engine serial, VIN or build date before you order and we will help you confirm fitment, so the right part arrives the first time.
UPS to all 50 states, including Alaska and Hawaii. Your rate shows at checkout. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax is additional; shipping is calculated at checkout. Buying tax-exempt? Qualifying diesel repair shops, fleets, farms, and agricultural operations can purchase tax-free. Set up tax-exempt purchasing once and every qualifying order is tax-free going forward.
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