Restore Your Truck’s Core Performance and Reliability
Is your 2003-2006 Chevrolet Suburban 1500, or another compatible GM truck, giving you headaches? If you’re dealing with a persistent check engine light, erratic engine behavior, poor fuel economy, or a frustrating no-start condition, the Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its health is critical. This replacement PCM, part number 28042802, is the definitive solution to get your vehicle back on the road and running smoothly, without the high costs and scheduling hassles of a dealership visit.
We take the guesswork and complexity out of the repair. Simply provide your vehicle’s 17-digit VIN during checkout, and our technicians will program the module with the latest, most stable software directly from GM. This ensures perfect compatibility with your specific vehicle configuration. When the part arrives, it’s ready for a straightforward installation, making this a job that a confident DIYer or any professional technician can handle with ease.
A Technician’s Notebook: The Ghost in the Machine
I once had a 2005 Sierra 1500 in my bay that was driving the owner crazy. The truck would randomly lose power and the transmission would shift hard, but there were no consistent transmission codes. He had already replaced the throttle position sensor and a speed sensor based on intermittent codes. After checking the wiring harnesses and grounds, everything looked perfect. On a hunch, I monitored the live data stream from the PCM and noticed the sensor voltage readings would flicker erratically. The PCM itself was failing internally, sending bad signals to other components. We installed a VIN-programmed PCM, and all the “ghost” problems vanished instantly. It’s a classic reminder that the PCM’s health affects everything downstream.
Is Your Truck Showing These Signs of PCM Failure?
A failing computer can cause a wide range of confusing symptoms. If your vehicle is experiencing any of the following, a faulty PCM is a likely cause. This is especially true if you see internal processor error codes.
- ✔ Vehicle will not start or is very difficult to start.
- ✔ Check Engine Light is illuminated with codes like P0601, P0602, P0605, or P0606 (Internal Control Module Errors).
- ✔ Poor or erratic automatic transmission shifting.
- ✔ Drastic decrease in fuel economy for no apparent reason.
- ✔ Engine stalling, stumbling, or misfiring intermittently.
- ✔ Communication loss codes, such as U0100, indicating the PCM isn’t talking to other modules.
- ✔ Failure to pass an emissions test.
A Straightforward Guide to Installation
Replacing the PCM on these GM trucks is a manageable job that typically takes less than an hour. Our pre-programming service handles the most difficult part for you. This 2003-2006 Suburban 1500 PCM is designed for a direct swap.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the PCM: On most of these trucks and SUVs, the PCM is located in the engine bay on the driver’s side, under or next to the battery tray. You may need to remove the battery to gain access.
- Disconnect the Harnesses: Carefully disengage the locking levers on the electrical connectors and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. Keep the hardware, as you will need it to install the new unit.
- Install the New PCM: Mount your new, VIN-programmed PCM onto the bracket and securely tighten the bolts.
- Reconnect Everything: Plug the electrical harnesses back into the new module until they click and the levers are fully locked. Reinstall the battery and connect the negative terminal.
- Perform Security Relearn: You will likely need to perform a simple security relearn procedure, which can be done without special tools. A common method is the “10-Minute Relearn,” which involves turning the key to the ‘ON’ position for 10-12 minutes. Instructions are readily available online for your specific model.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, and 89017734. It fits a wide range of GM trucks and SUVs. Please verify your vehicle is on the list below. Note that some 2004 models require matching the ID number 12602802.
CADILLAC ESCALADE, ESV, EXT (03-06)
CHEVROLET SILVERADO 1500, 2500, 3500 (03-07 Classic)
CHEVROLET SUBURBAN 1500, 2500 (03-06)
CHEVROLET TAHOE (03-06)
CHEVROLET SSR (03)
GMC SIERRA 1500, 2500, 3500 (03-07 Classic)
GMC SIERRA DENALI (03-07 Classic)
GMC YUKON & YUKON XL 1500, 2500 (03-06)
HUMMER H2 (03-07)
ISUZU ASCENDER (03)
GMC ENVOY XL (03)
CHEVROLET TRAILBLAZER EXT (03)
Order your VIN-programmed 2003-2006 Suburban 1500 PCM today and restore your vehicle’s proper function and driveability with confidence.
Frequently Asked Questions
Frequently Asked Questions
Do I need to send my old PCM back?
No core charge or return is required for this part. You can keep your old module.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations your specific vehicle requires. This ensures compatibility with your engine, transmission, and options for a true plug-and-play installation.
What is a security relearn and is it difficult?
A security relearn syncs the new PCM with your vehicle’s anti-theft system. For most of these GM vehicles, it’s a simple procedure that involves turning the key to the ‘ON’ position for about 10 minutes, then off, then starting the vehicle. It requires no special tools.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original PCM (e.g., codes P0601-P0606), then this replacement module will solve the problem. It’s crucial to ensure the issue isn’t with a sensor or wiring before ordering.
Is this part difficult to install for a DIYer?
For someone with basic mechanical skills and tools, this is a very manageable job. The most common location is under the battery. Since we handle the programming, the physical swap is all that’s required from you, followed by the simple security relearn.