Restore Your Vehicle’s Core Performance with a VIN-Programmed PCM
If you’re dealing with baffling engine problems, erratic transmission shifting, or a persistent Check Engine Light that won’t go away, the root cause is often the vehicle’s central computer—the Powertrain Control Module (PCM). As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing PCM can mimic dozens of other issues, leading to wasted time and money on unnecessary parts. This isn’t just a component; it’s the brain of your engine, and when it falters, the entire vehicle suffers. This replacement PCM, part number 28042802, is the definitive solution to get your truck or SUV running reliably again.
A Technician’s Notebook: The Silverado with a Ghost
A 2005 Silverado 1500 came into my bay with a complaint that stumped two other shops. The owner described random stalling at red lights, harsh 1-2 shifts, and a fuel gauge that occasionally dropped to empty. His dashboard was lit up like a Christmas tree. We checked the usual suspects—fuel pump pressure was good, sensors tested fine, and the transmission fluid was clean. The scan tool showed a mess of communication errors (U-codes) and a P0601 for internal module memory error. That P0601 was the smoking gun. A failing PCM was corrupting data across the network, creating these ‘ghost’ problems. We installed a VIN-programmed PCM just like this one, and it was like flipping a switch. All the issues vanished instantly. This isn’t just about replacing a part; it’s about restoring order to your vehicle’s complex electronic nervous system.
Is Your Truck Exhibiting These Classic PCM Failure Signs?
A failing PCM can cause a wide array of symptoms that can be difficult to diagnose. If your vehicle is showing any of these signs, a faulty engine computer is a likely culprit:
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained drop in fuel economy.
- ✔ The Check Engine Light is on, often with codes like P0601, P0606, or various U-codes (communication errors).
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Seemingly unrelated sensor failures or warning lights.
A Straightforward Guide to Your PCM Installation
One of the biggest advantages of this module is that it arrives programmed specifically for your vehicle’s VIN. This eliminates the need for expensive dealership programming tools. The physical swap is a job most DIYers can handle in under an hour.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system capacitors to discharge.
- Locate the Old PCM: On most compatible GM trucks and SUVs, the PCM is located in the engine bay, either on the driver’s side fender well under the battery tray or next to the air filter box.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Avoid wiggling them side-to-side, which can damage the pins.
- Remove the Module: Unbolt the old PCM from its mounting bracket. Keep the hardware, as you may need it for the new module.
- Install the New PCM: Mount the new module securely in the bracket and reconnect the electrical harnesses. Ensure they click firmly into place.
- Reconnect and Start: Reconnect your battery’s negative terminal. The vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes before starting. Your vehicle is now ready to go!
Verified to Fit a Wide Range of GM Trucks & SUVs
This Powertrain Control Module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify your vehicle’s model and options below to ensure compatibility. Note that for some 2004 models, you must match the ID number 12602802 on your original part.
Cadillac: Escalade, ESV, EXT (2003-2006)
Chevrolet: Avalanche 1500 (2003-2006), Silverado 1500/2500/3500 (2003-2007 Classic), Suburban 1500/2500 (2003-2006), Tahoe (2003-2006), SSR (2003), Trailblazer EXT (2003, 5.3L)
GMC: Sierra 1500/2500/3500 & Denali (2003-2007 Classic), Yukon & Yukon XL 1500/2500 (2003-2006), Envoy XL (2003, 5.3L)
Hummer: H2 (2003-2007)
Note: Please refer to the detailed fitment list in the original data for specific options and engine sizes.
Why do you need my VIN?
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to program the PCM with the exact software and calibrations specific to your vehicle’s engine, transmission, and factory options. This ensures seamless communication between all modules and guarantees a true plug-and-play installation without needing a trip to the dealer.
Will I need to do any other programming after installation?
No. Our service includes flashing the module with the latest GM updates based on your VIN. In some cases, a simple security relearn procedure (turning the key on for 10-15 minutes) may be required, which does not need any special tools.
Is this a new or used part?
This is a high-quality, tested, and verified used OEM part that has been professionally inspected and prepared for programming. We ensure every module meets strict performance standards before it is flashed and shipped to you.
How can I be sure this fits my truck?
The best way to ensure compatibility is to match the service number on your current PCM to one of the numbers listed (e.g., 89017750, 12602802, 28042802). You can also use our detailed vehicle fitment list. If you’re still unsure, contact us with your VIN, and we’ll be happy to verify it for you.