Programmed 2005-2007 Express 3500 Van PCM 12602801 | VIN Matched

### Programmed 2005-2007 Express 3500 Van PCM 12602801 \| VIN Matched   ## Restore Peak Performance to Your GM Workhorse Is your 2005-2007 Express 3500 Van running rough, shifting erratically, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit behind these frustrating and costly issues. As the brain of your vehicle’s engine and transmission, a faulty PCM can cripple your van’s reliability. This replacement PCM, part number **12602801**, is the definitive solution to get your vehicle back on the road, operating exactly as the factory intended. We take the guesswork and hassle out of the repair. Unlike sourcing a module from a salvage yard, this unit comes professionally programmed to your van’s specific Vehicle Identification Number (VIN). We install the latest, most stable software updates directly from GM, which can resolve underlying drivability issues you didn’t even know were software-related. This ensures perfect communication between all your vehicle’s systems, restoring lost fuel economy, smooth shifting, and proper engine function. This is the most reliable and straightforward way to replace a failing **2005-2007 Express 3500 Van PCM**. #### Case Study: The Phantom Stall A local plumbing company brought in their ’06 Express 3500. The driver complained of random stalling at stoplights and a persistent Check Engine Light. Their previous mechanic had replaced the fuel pump and spark plugs with no luck. After connecting my scan tool, I saw a P0601 (Internal Control Module Memory Check Sum Error). While this code points directly to the PCM, the intermittent nature of the fault was tricky. We ordered a VIN-programmed module like this one. The installation was simple, and after performing a security relearn, the van ran perfectly. The pre-flashed module saved the company hundreds in diagnostic time and dealership programming fees, getting their work van back in service the same day. ### Is Your Van Showing These Telltale Signs? A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer needs attention: - ✔ Check Engine Light is on with codes like P0601, P0606, or other U-series communication codes. - ✔ The engine cranks but refuses to start. - ✔ Unexplained drops in fuel mileage. - ✔ Harsh, erratic, or delayed automatic transmission shifting. - ✔ The vehicle stalls unexpectedly, either while driving or at idle. - ✔ Noticeable loss of power and poor acceleration. ## A Straightforward Guide to Installation Replacing the **2005-2007 Express 3500 Van PCM** is a job most DIYers or any professional can handle. Since we program it beforehand, you can skip the expensive trip to the dealer for flashing. 1. **Safety First:** Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. 2. **Locate the PCM:** On Express and Savana vans, the PCM is typically located in the engine compartment on the driver’s side, near the firewall. 3. **Disconnect Connectors:** Carefully release the locking tabs and unplug the wiring harnesses from the old PCM. Inspect the connectors for any corrosion or damage. 4. **Remove the Old Module:** Unbolt the old PCM from its mounting bracket. 5. **Install the New Module:** Bolt the new, pre-programmed PCM into place and securely reconnect the wiring harnesses. Ensure they click into place. 6. **Reconnect Battery:** Reattach the negative battery terminal. 7. **Perform Security Relearn:** You will likely need to perform a simple security or anti-theft relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the new PCM to sync with your vehicle’s anti-theft system. ## Verified Vehicle Compatibility This module is a direct replacement for part numbers **12589462, 12602801, and 89017749**. It is guaranteed to fit the following vehicles: EXPRESS 1500/2500/3500 VAN (2005-2007) SAVANA 1500/2500/3500 VAN (2005-2007) SILVERADO 1500/2500/3500 PICKUP (2005-2007 Classic Style) SIERRA 1500/2500/3500 PICKUP (2005-2007 Classic Style) SUBURBAN 2500 (2005-2006) AVALANCHE 2500 (2005-2006) YUKON XL 2500 (2005-2006) ASTRO / SAFARI (2005) BLAZER S10 / JIMMY S15 (2005) CTS (2004-2005, V-Series) _Note: Please verify your specific engine option (e.g., 4.3L, 8.1L) and part number. Our VIN programming ensures compatibility._ Don’t let a faulty computer keep your reliable GM truck or van off the road. This pre-programmed **2005-2007 Express 3500 Van PCM** is the fastest and most dependable way to solve complex electronic issues and restore your vehicle’s performance. Why do you need my VIN? We require your Vehicle Identification Number (VIN) to load the exact, correct GM-certified software for your van’s specific engine, transmission, and options. This ensures a perfect match and seamless operation without needing a trip to the dealership for programming. Is this a plug-and-play part? Almost! Because the module comes pre-programmed to your VIN, the complex part is done. However, you will need to perform a simple security relearn procedure after installation, which takes about 30 minutes and requires no special tools. Will this fix my transmission shifting problems? In many cases, yes. The PCM controls both the engine and the transmission. If your shifting problems are caused by faulty electronic signals from a failing computer, this module will resolve them. It’s a very common symptom of PCM failure. Does this module come with a warranty? Yes, all of our electronic modules are thoroughly tested and come with a standard warranty against defects. Please see our warranty policy page for complete details. Please enter it in the payment notes and save to ensure we receive it. Orders without a VIN within our 2-business-day handling period may be canceled, as programming cannot proceed without it. ### Shipping - **Processing Time:** Reliably shipped within 2-3 business days. ### Warranty Enjoy peace of mind with a **one-year replacement warranty** on this part, effective from the date you receive it. Labor costs are not covered. If the part fails within the warranty period, we’ll replace it with a comparable unit or refund your purchase price, ensuring a hassle-free experience. **Return Address:** **Highway71autoparts** **9131 Highway 71 NE** **Spicer, MN, 56288**

• Country of Origin: United States
• Manufacturer Part Number: 12602801
• Manufacturer Warranty: 1 Year
• Superseded Part Number: 12602801, 89017749, 12589462
• Genuine OEM: Yes
• Interchange Part Number: 590-07622
• PartNumber: 590
• Model: EXPRESS 3500 VAN
• Year: 2006
• Brand: GM
• MPN: 12589462 12602801 89017749