Restore Your Truck’s Performance with a VIN-Programmed PCM
Is your 2003-2007 GMC Sierra 1500 or other GM truck acting up? Dealing with a persistent check engine light, rough idling, poor fuel economy, or even a frustrating no-start condition can bring your work or weekend to a halt. The Powertrain Control Module (PCM) is the brain of your vehicle’s engine and transmission, and when it fails, it can cause a wide range of confusing and debilitating issues. This replacement PCM, part number 12589463, is the definitive solution to get your truck running reliably again.
We take the guesswork and high dealership costs out of the equation. Before this module ships, we program it with the latest official GM software, specifically matched to your truck’s Vehicle Identification Number (VIN). This means it arrives ready for installation, saving you a trip to the dealer and the expense of programming fees. Get your powerhouse back on the road with a component designed for a perfect fit and correct function.
Case Study: A Tricky Diagnosis
I once had a 2005 Silverado in my bay with symptoms that baffled two other shops. The owner complained of random stalling at stoplights and an intermittent no-start that never seemed to happen when a technician was watching. There were no consistent trouble codes, just a few random communication errors (U-codes) that would come and go. After checking all the usual suspects—fuel pump, crank sensor, grounds—I focused on the PCM. On these GM trucks, I’ve seen the internal processors on the PCM begin to fail from years of heat cycles and vibration. The failure isn’t always a complete shutdown; sometimes it’s just a momentary glitch, enough to stall the engine. We installed a VIN-programmed PCM like this one, performed the quick security relearn, and the truck never stalled again. It’s a classic example of how a failing computer can mimic a dozen other mechanical problems.
Common Signs of a Failing PCM
If you’re experiencing any of the following, a faulty PCM could be the culprit. A replacement is often the most direct fix for these electronic gremlins.
- ✔ Vehicle refuses to start or has intermittent starting issues.
- ✔ Check Engine Light is illuminated with codes like P0601, P0602, P0606 (Internal Module Processor Failure) or U-series communication codes.
- ✔ A noticeable drop in fuel efficiency.
- ✔ Engine stalling, stuttering, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions test due to module-related errors.
Plug-and-Play Installation: Get Back on the Road Fast
Installing your new 2003-2007 Sierra 1500 PCM is a straightforward process. While professional installation is always an option, many DIYers can handle this job with basic hand tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: On most compatible trucks and SUVs, the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray in a black plastic housing.
- Disconnect and Remove: Carefully unplug the electrical connectors. There are typically release tabs that need to be pressed or lifted. Once disconnected, unbolt the PCM from its mounting bracket and remove it.
- Install the New PCM: Mount the new module in the same location and securely reconnect the electrical harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Relearn Procedure: After installation, a quick security relearn (often called a CASE relearn or anti-theft relearn) is required for the vehicle to start. This procedure syncs the new PCM with your vehicle’s anti-theft system and can typically be done without special tools in about 30 minutes. Instructions are widely available online or in service manuals for your specific model.
Guaranteed Fitment for Your GM Truck or SUV
This PCM is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify your part number or use the compatibility list below. Remember to provide your VIN upon purchase for programming.
ESCALADE 04 Electronic Control Module; (LH front under battery), ID 12602802
ESCALADE EXT 04 Electronic Control Module; (LH front under battery), ID 12602802
HUMMER H2 04 Electronic Control Module; (LH front under battery), SUV
SIERRA 3500 PICKUP 03 Electronic Control Module; (LH front under battery), gasoline, 6.0L
TAHOE 04 Electronic Control Module; (LH front under battery), ID 12602802
YUKON XL 2500 04 Electronic Control Module; (LH front under battery), 6.0L, ID 12602802
ENVOY XL 03 Electronic Control Module; 5.3L (next to air box)
SUBURBAN 2500 03 Electronic Control Module; (LH front under battery), 6.0L
YUKON 04 Electronic Control Module; (LH front under battery), ID 12602802
YUKON XL 2500 05-06 Electronic Control Module; (LH front under battery), 6.0L
AVALANCHE 1500 04 Electronic Control Module; (LH front under battery), ID 12602802
SIERRA 1500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), w/o hybrid option; w/o 4.3L
SIERRA DENALI 05-06 Electronic Control Module; (LH front under battery)
SUBURBAN 2500 04 Electronic Control Module; (LH front under battery), 6.0L, ID 12602802
YUKON XL 1500 03 Electronic Control Module; (LH front under battery)
YUKON XL 1500 04 Electronic Control Module; (LH front under battery), ID 12602802
ESCALADE ESV 03 Electronic Control Module; (LH front under battery), PCM
ESCALADE ESV 04 Electronic Control Module; (LH front under battery), ID 12602802
HUMMER H2 07 Electronic Control Module; (LH front under battery), powertrain control
SIERRA 3500 PICKUP 05-06 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SIERRA DENALI 03 Electronic Control Module; (LH front under battery)
SILVERADO 2500 PICKUP 05-06 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SUBURBAN 1500 03 Electronic Control Module; (LH front under battery)
HUMMER H2 05-06 Electronic Control Module; (LH front under battery)
SIERRA 2500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12602802
YUKON 03 Electronic Control Module; (LH front under battery)
ESCALADE 05-06 Electronic Control Module; (LH front under battery)
ESCALADE ESV 05-06 Electronic Control Module; (LH front under battery)
SIERRA 2500 PICKUP 05-06 Electronic Control Module; (LH front under battery), gasoline, 6.0L
AVALANCHE 1500 03 Electronic Control Module; (LH front under battery)
SILVERADO 2500 PICKUP 03 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SILVERADO 1500 PICKUP 04 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L; ID 12602802
TAHOE 03 Electronic Control Module; (LH front under battery)
TAHOE 05-06 Electronic Control Module; (LH front under battery)
YUKON 05-06 Electronic Control Module; (LH front under battery)
SILVERADO 3500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12602802
SILVERADO 2500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), gasoline, 6.0L
SILVERADO 3500 PICKUP 05-06 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SUBURBAN 1500 04 Electronic Control Module; (LH front under battery), ID 12602802
ISUZU ASCENDER 03 Electronic Control Module; (LH engine), 5.3L
SIERRA 1500 PICKUP 03 Electronic Control Module; (LH front under battery), w/o 4.3L
SIERRA 1500 PICKUP 04 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L; ID 12602802
ESCALADE 03 Electronic Control Module; (LH front under battery), PCM
SSR 03 Electronic Control Module; (next to air box)
SIERRA 2500 PICKUP 03 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SIERRA DENALI 07 Electronic Control Module; classic style (creased door skin), (LH front under battery)
SILVERADO 3500 PICKUP 03 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SUBURBAN 1500 05-06 Electronic Control Module; (LH front under battery)
TRAILBLAZER EXT 03 Electronic Control Module; 5.3L (next to air box)
SILVERADO 1500 PICKUP 05-06 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L
SILVERADO 1500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), w/o hybrid option; w/o 4.3L
SILVERADO 3500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), gasoline, 6.0L
YUKON XL 1500 05-06 Electronic Control Module; (LH front under battery)
ESCALADE EXT 05-06 Electronic Control Module; (LH front under battery)
SIERRA 1500 PICKUP 05-06 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L
SUBURBAN 2500 05-06 Electronic Control Module; (LH front under battery), 6.0L
HUMMER H2 03 Electronic Control Module; (LH front under battery)
SIERRA 2500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), gasoline, 6.0L
SIERRA 3500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), gasoline, 6.0L
SIERRA DENALI 04 Electronic Control Module; (LH front under battery), ID 12602802
SILVERADO 1500 PICKUP 03 Electronic Control Module; (LH front under battery), w/o 4.3L
ESCALADE EXT 03 Electronic Control Module; (LH front under battery), PCM
SIERRA 3500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12602802
SILVERADO 2500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12602802
YUKON XL 2500 03 Electronic Control Module; (LH front under battery), 6.0L
Frequently Asked Questions
Do I need to do anything after I buy this PCM?
Yes. After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. We cannot program and ship your module without it. This ensures the software is a perfect match for your truck’s specific options.
What is a CASE Relearn and is it difficult?
A CASE (Crankshaft Angle Sensor Error) Relearn, also part of the security relearn, synchronizes the new PCM with your engine’s crankshaft position sensor. For most of these GM vehicles, the procedure involves a series of key turns and waiting periods and does not require a dealer scan tool. It’s a crucial final step for smooth engine operation.
Is this a plug-and-play part?
Essentially, yes. Because we handle the programming, you will not need a high-end scan tool to flash the module. You simply install it and perform the security/CASE relearn procedure. This makes it a job that many vehicle owners can do themselves.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM (like code P0601), then yes, this part is the correct fix. However, you should always ensure other potential causes have been ruled out. A faulty sensor or wiring issue can also trigger a check engine light.
How do I find my original part number?
The part number is printed on a sticker on your original PCM. You can match it to 12589463 or any of the compatible service numbers listed to confirm fitment. If you can’t find it, our extensive fitment list should help, but providing your VIN is the most foolproof method.