VIN Programmed 2003-2004 Chevrolet Silverado Engine Computer PCM 12581565 GM

- **Need Help?** Not sure? Message us with your **VIN**, and we’ll verify for you. * * * ## Why Buy From Us? - **Remanufactured** – Works like new. - **Pre-Programmed to Your VIN** – Ready to install. - **No Core Charge** – Keep your old unit! - **DIY Friendly** – Simple installation with clear instructions. - **1-Year Warranty** – Shop with confidence. * * * ## Easy Installation This **Engine Control Module (ECM/PCM)** is a **direct replacement** for your original unit and comes **pre-programmed to your VIN**. After installation, a **key relearn process** is required to sync the ECM with your vehicle’s security system. This **takes about 30 minutes** and does not require a scan tool. In some cases, **a crankshaft variation relearn** may be required to resolve codes **P0315/P1336**. If required, this step will need a scan tool capable of performing the function. ### To Complete Installation, You’ll Receive: - **Step-by-Step Instructions** – A full guide for the **30-minute key relearn process** ( **no scan tool needed**). - **Crankshaft Variation Relearn Guide** – If required, includes **affordable tool and software recommendations.** * * * ## ⚠ Important Notes - **VIN Required** – Please provide your **17-digit VIN** at checkout or via message so we can program the ECM. - **Don't Need Programming?** – Let us know at checkout if you prefer to receive the ECM **without programming**. **You will need to program it yourself after installation.** To ensure compatibility, we recommend sending us your **VIN or the part number** so we can double-check fitment. * * * ## Fast & Reliable Service - **Ships Quickly** – Most orders ship **within 1 business day** via **USPS Priority Mail** (expedited shipping available). We’re here to assist with installation or any questions. ### **Fast shipping, easy installation—get your vehicle back on the road** **in no time** **!**

• Brand: GM
• Type: Powertrain Control Module (PCM)
• Superseded Part Number: Program to your VIN, ECU ECM PCM MODULE
• Manufacturer Warranty: Yes
• Manufacturer Part Number: 12581565
• OE/OEM Part Number: ECU, PCM, ECM, Program to your VIN
• Interchange Part Number: 12570557, 12576106, 12576869, 12578127, 89017733