Restore Peak Performance to Your GM Truck or Van
Is your 2003 Silverado 3500 or another GM vehicle acting up? Experiencing frustrating issues like a no-start condition, erratic idling, poor fuel economy, or a persistent Check Engine Light? The Powertrain Control Module (PCM), often called the engine’s brain, is frequently the source of these perplexing problems. When it fails, it can disrupt everything from fuel delivery to transmission shifting. This isn’t just an inconvenience; for a work truck, it’s a critical failure that costs you time and money.
This is a direct-fit replacement PCM, service number 89017733, that arrives at your door ready for installation. The biggest hurdle with PCM replacement is typically the expensive and time-consuming programming required at a dealership. We eliminate that step. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this module with the latest, most stable GM-approved software for your specific vehicle. This ensures optimal engine performance, transmission function, and emissions compliance right out of the box.
From the Diagnostic Bay
I remember a 2003 Sierra 2500 with the 8.1L that came into my shop with a bizarre issue. The owner complained of intermittent stalling, but only after it was fully warmed up and had been driven for 20+ miles. There were no hard codes, just a pending P0606 (PCM Processor Fault) that would never set the light. We checked everything—fuel pressure, crank sensor, wiring. Finally, on a long test drive with a high-end scanner, we saw the PCM’s internal processor temperature spike just before it would stall. The module was failing under heat soak. A new, properly programmed PCM like this one solved the problem instantly. Sometimes, the symptoms aren’t obvious, but a failing PCM can cause chaos.
Is Your Truck Showing These Symptoms?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, a faulty module could be the cause:
- ✔ Check Engine Light is on with codes like P0601, P0602, P0606, or other communication errors (U-codes).
- ✔ The engine cranks but refuses to start.
- ✔ Rough or unpredictable idling.
- ✔ A sudden, unexplained drop in fuel mileage.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ The vehicle stalls intermittently, especially when warm.
- ✔ Failure to pass an emissions inspection.
A Straightforward Guide to Installation
Installing your new 2003 Silverado 3500 Powertrain Control Module is a manageable job for a DIYer with basic tools. Following these steps will ensure a smooth process.
- 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 PCM: On most GM trucks like the Silverado and Sierra, the PCM is located on the driver’s side, under the battery tray or near the airbox. On Express/Savana vans, it’s typically in the LH rear of the engine compartment.
- Disconnect Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old PCM. Inspect them for any corrosion or damaged pins.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you will reuse it.
- Install the New Module: Mount your new PCM onto the bracket and securely fasten it.
- Reconnect Everything: Plug the wiring harness connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: In many cases, you will need to perform a security relearn procedure (often called a CASE learn) to sync the new PCM with your vehicle’s anti-theft system. This can typically be done without special tools and instructions are widely available online for your specific model.
Verified Vehicle Compatibility
This module is a direct replacement for service number 89017733 and is compatible with a wide range of GM vehicles. Please verify your model and options below. This part fits:
- ✔ 2003 Chevrolet Silverado & GMC Sierra 3500 Pickup (8.1L Gas)
- ✔ 2003 Chevrolet Silverado & GMC Sierra 2500 Pickup (8.1L Gas)
- ✔ 2003 Chevrolet Suburban & GMC Yukon XL 2500 (8.1L)
- ✔ 2003 Chevrolet Avalanche 2500
- ✔ 2003 Chevrolet Express & GMC Savana Vans (1500, 2500, 3500)
- ✔ 2003 Chevrolet S10/S15/Sonoma & Blazer/Jimmy S15 (4.3L)
- ✔ 2003 Chevrolet Astro & GMC Safari
- ✔ 2004 Cadillac CTS (Base, ID 12581565)
- ✔ 2004 Chevrolet Corvette (ID 12581565)
Frequently Asked Questions
Do I need to do anything after I install this PCM?
Yes. While the main engine and transmission programming is done, you will likely need to perform a security relearn procedure (also known as a CASE Relearn or Crankshaft Variation Relearn). This procedure syncs the new PCM to your vehicle’s security system and crankshaft position sensor. It can usually be done without special tools and takes about 30 minutes.
How do I provide my VIN?
Simply enter your 17-digit Vehicle Identification Number (VIN) in the notes section during checkout, or send it to us in a message after your purchase. We cannot program and ship your module without it.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part. Each unit is verified to be fully functional before being programmed with the latest GM software for your specific VIN, ensuring reliability and perfect fitment.
Will this fix my check engine light?
If the Check Engine Light is caused by an internal failure of the PCM (e.g., codes P0601, P0606), then yes, this part will solve the problem. However, it’s crucial to ensure you’ve diagnosed the issue correctly, as other failing sensors or wiring problems can also trigger warning lights.
What if my original part number isn’t 89017733?
This module replaces multiple 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.