Restore Peak Performance to Your GM Truck or Van
Is your 2003 Chevy S10, GMC Sonoma, or other compatible GM vehicle suffering from frustrating issues like stalling, a persistent check engine light, or a complete no-start condition? As a technician with over two decades of diagnostic experience, I’ve seen firsthand how a failing Powertrain Control Module (PCM) can mimic a dozen other problems, leading to wasted time and money on unnecessary repairs. This module, part number 89017733, is the reliable, straightforward solution to get your vehicle running smoothly again.
This isn’t just a replacement part; it’s a complete service. We handle the complex part for you. Before we ship, our experts will program the PCM with the latest official GM software updates, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This means no expensive trips to the dealership for programming. It arrives at your door ready for installation, saving you hundreds of dollars and significant hassle.
Case Study: A Tricky Diagnosis
A customer brought in his 2003 S10 with the 4.3L V6. The complaint was intermittent stalling at stoplights and a random no-start that would resolve itself after a few minutes. He had already replaced the fuel pump and ignition coil with no luck. My scan tool showed a P0601 (Internal Control Module Memory Check Sum Error) code that would appear and disappear. This is a classic sign of an internal PCM failure. Instead of chasing ghosts, we installed a correctly programmed PCM. The truck fired up instantly and the intermittent issues were gone for good. This simple swap saved the customer from further guesswork and costly part replacements.
Is Your Truck Exhibiting These Symptoms?
A failing PCM can cause a wide range of confusing symptoms. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Unexplained Check Engine Light with codes like P0601, P0606, or U0100.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Poor fuel economy and decreased engine power.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication issues with diagnostic scan tools.
DIY-Friendly Installation: A Step-by-Step Guide
Replacing the 2003 S10 Sonoma PCM is a job most DIYers can handle with basic tools. For the S10/Sonoma/Blazer/Jimmy, it’s located in the right-hand (passenger side) front of the engine compartment.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: Find the module on the passenger side of the engine bay, typically mounted to a bracket.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you will need it for the new module.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: Your vehicle is ready to start. In some cases, a security relearn procedure may be necessary, which can typically be done without special tools (instructions are widely available online or in your owner’s manual).
Verified Vehicle Compatibility
This module is a direct replacement for a wide array of GM vehicles. Please verify your model and options below. It is a compatible replacement for service numbers including 12581565, 12570557, 12576106, 89017733, and more.
- Astro / Safari (GMC) 2003: Electronic Control Module; (LH front by battery)
- Avalanche 2500 2003: Electronic Control Module; (LH front under battery)
- Blazer S10 / Jimmy S15 2003: Electronic Control Module; (RH front engine compartment)
- CTS 2004: Electronic Control Module; (RH engine compartment), Base, ID 12581565
- Corvette 2004: Electronic Control Module; (RH engine compartment), ID 12581565
- Express / Savana Vans (1500, 2500, 3500) 2003: Electronic Control Module; (LH rear engine compartment)
- S10 / S15 / Sonoma 2003: Electronic Control Module; (RH front engine compartment), 4.3L
- Sierra / Silverado 1500 2003: Electronic Control Module; (LH front under battery), w/4.3L
- Sierra / Silverado 2500 & 3500 2003: Electronic Control Module; (LH front under battery), gasoline, 8.1L
- Suburban / Yukon XL 2500 2003: Electronic Control Module; (LH front under battery), 8.1L
Frequently Asked Questions
Do I need to program this module?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation, saving you a trip to the dealer.
What is a VIN and where do I find it?
The VIN is your vehicle’s 17-digit identification number. You can find it on your driver’s side dashboard (visible through the windshield), on the driver’s door jamb sticker, or on your vehicle’s registration and insurance documents.
Where is the PCM located on my 2003 S10?
On the 2003 S10, Sonoma, Blazer, and Jimmy, the PCM is located in the engine compartment on the front passenger (right-hand) side.
Will this fix my check engine light?
If the check engine light is caused by an internal PCM failure (like codes P0601-P0606) or related component driver circuits, this part will resolve the issue. It’s crucial to ensure the PCM is the root cause of the problem.
Is a security relearn procedure required?
For many GM vehicles of this era, a simple security relearn (often called a Passlock relearn) may be needed after installation. This procedure typically involves cycling the key and can be done in your driveway in about 30 minutes without special tools.
What if my original part number isn’t an exact match to 89017733?
This module replaces a wide range of original service numbers, including 12581565, 12570557, 12576106, and others listed in the description. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.