Restore Your GM Truck’s Performance and Reliability
Is your 2003-2006 Suburban 2500 or other GM truck suffering from frustrating, hard-to-diagnose issues? A faulty Powertrain Control Module (PCM) is often the hidden culprit behind problems like erratic engine behavior, poor fuel economy, and persistent check engine lights. As the central computer for your engine and transmission, a failing PCM can wreak havoc on your vehicle’s drivability. This replacement PCM, part number 89017750, is the definitive solution to get your truck running like it should. We take the guesswork out of the repair by programming the module to your vehicle’s specific VIN before it ships, ensuring a seamless installation process.
From the Diagnostic Bay: The Intermittent Stall Case
I remember a 2005 Silverado 2500 with a 6.0L that came into my shop with the most frustrating problem: it would randomly stall at stoplights, but only when warm. The owner had replaced the fuel pump and multiple sensors with no luck. There were no consistent trouble codes, just a history of random communication faults. After confirming power and grounds to the module were solid, experience pointed me to the PCM. These units can fail internally from heat cycles and vibration, causing micro-fractures in the circuit board. We installed a VIN-programmed PCM, and the problem vanished instantly. It’s a classic example of how a faulty 2003-2006 Suburban 2500 PCM or its equivalent can create phantom issues that parts-swapping won’t solve.
Is Your Truck Showing These Symptoms?
A failing PCM can manifest in various ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer needs attention:
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Stalling, stumbling, or rough idling
- ✔ Harsh or incorrect transmission shifting
- ✔ A noticeable drop in fuel mileage
- ✔ The engine won’t start, but the battery and starter are good
- ✔ Diagnostic trouble codes (DTCs) related to internal module failure (e.g., P0601, P0606) or communication errors (U-codes)
A Straightforward Guide to Installation
Replacing the PCM on these GM trucks is a job most DIYers can handle in their own driveway. Our VIN programming service makes it a true plug-and-play repair. Here’s a typical process:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these trucks and SUVs, the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray.
- Disconnect the Connectors: Carefully unplug the wiring harness connectors from the old PCM. These usually have a lever or tab that needs to be released.
- Remove the Old 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 your new, pre-programmed PCM onto the bracket and securely plug in the wiring harness connectors. You should hear a click as they lock into place.
- Reconnect Power: Reconnect the negative battery terminal.
- Perform Security Relearn (If Needed): In most cases, the vehicle will start and run perfectly. Some models may require a simple security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Instructions are readily available online for your specific model.
By ordering this pre-programmed 2003-2006 Suburban 2500 PCM, you avoid a costly trip to the dealership for programming, saving you both time and money.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM vehicles. Please verify your specific model and year from the list below.
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
How does the VIN programming process work?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). Our technicians use this VIN to access the latest GM software and program the PCM specifically for your vehicle’s factory settings and options. This ensures it works correctly right out of the box.
Do I need to send my old PCM back (core charge)?
This listing does not require a core return. You can keep your old module, which saves you the time and expense of shipping it back.
Will this fix my specific problem?
This 2003-2006 Suburban 2500 PCM is a reliable solution for issues caused by a faulty module, such as internal errors (P0601), stalling, and communication faults. While it fixes a very common point of failure, you should always ensure your vehicle’s issues are not caused by other components like wiring or sensors. A proper diagnosis is always recommended.
Is any other programming required after installation?
No additional programming is required. Because we flash the module with your VIN, it’s ready for installation. In some cases, a simple, tool-free security relearn procedure (often called a ‘key-on’ relearn) may be necessary to sync the module with your vehicle’s anti-theft system.
What if I have questions during installation?
Our team of experienced automotive professionals is here to help. If you encounter any issues or have questions, please don’t hesitate to contact us. We’re committed to ensuring your repair is a success.