OEM ECU ECM PCM 12586265 Ydnk for 2003-2007 Chevy GMC 4.8l 5.3l 6.0l Ls V8

This listing is for an **OEM Delphi P59 PCM/ECM** (GM service number **12586265**) It is compatible with many 2003‑2006 GM full‑size trucks and SUVs equipped with 4.8L, 5.3L or 6.0L Vortec V8 engines.

**Known applications include:**

- 2003‑2006 Chevrolet Avalanche 1500 & 2500

- 2003‑2007 Silverado 1500, 1500 Classic, 1500 HD & 1500 HD Classic

- 2003‑2006 Silverado 2500, 2500 HD & 2500 HD Classic

- 2003‑2006 Suburban 1500 & 2500

- 2003‑2006 Tahoe (4.8/5.3 V8)

- 2003‑2006 TrailBlazer EXT & 2003‑2004 SSR (5.3 V8)

- 2003‑2007 GMC Sierra 1500, Sierra 1500 Classic, Sierra 1500 HD & 1500 HD Classic

- 2003‑2006 Sierra 2500, 2500 HD & 2500 HD Classic

- 2003‑2006 Yukon, Yukon XL 1500/2500 & Yukon Denali

- 2003‑2006 Envoy XL & Envoy Denali (5.3 V8)

- 2003‑2007 Chevrolet Express 2500/3500 & GMC Savana 2500/3500 vans (gas V8 engines)

- 2003‑2006 Cadillac Escalade, Escalade ESV & Escalade EXT

Please verify that your existing PCM/ECU's service number matches **12586265** Professional programming and security relearn may be required for installation. This unit is used and may show signs of wear but was functioning properly when removed.

🔁 Returns & Policy

• 30-Day Returns: Accepted if the item is returned in the same condition as shipped and includes all original hardware or accessories .

• Identification Mark: Each part is discreetly marked with a UV or tamper-proof identifier . The mark must remain intact and match the original item for a refund.

• Buyer Responsibility: It is the buyer's responsibility to verify compatibility before purchase.

• Professional Installation: Strongly recommended to ensure proper function and to prevent damage.

• OEM Verification: All parts listed are OEM unless otherwise stated and have been verified for compatibility to the best of our ability.