Is your 2003 GMC Sierra 1500 running rough, stalling, or displaying a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your truck’s engine and transmission. A faulty PCM can cause a cascade of frustrating and difficult-to-diagnose issues, leaving your reliable workhorse parked. This replacement PCM, part number 89017733, is the definitive solution to restore your truck’s performance, drivability, and reliability.
This isn’t just a generic part off the shelf. We take the guesswork out of the repair by pre-programming this module specifically for your vehicle using the VIN you provide. This critical step ensures that all factory settings, security information (anti-theft), and engine parameters are perfectly matched to your truck’s original specifications. It arrives ready for installation, loaded with the latest GM software updates to optimize performance and efficiency.
Symptoms of a Failing 2003 Sierra 1500 PCM
If your truck is experiencing any of the following issues, a faulty powertrain module is a likely culprit. Don’t let these problems persist and potentially cause further damage to your engine or transmission.
- ✔ Persistent and illuminated Check Engine Light with various trouble codes.
- ✔ Unexplained stalling or difficulty starting the engine.
- ✔ Rough or erratic idling that you can’t seem to solve.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or delayed shifting from the automatic transmission.
- ✔ Engine misfires or hesitation during acceleration.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Communication errors with diagnostic scan tools.
Replacing your failing module with this pre-programmed unit directly addresses the root cause of these symptoms. By providing us with your VIN at checkout, you ensure a plug-and-play repair process that gets you back on the road quickly. Once installed, your truck will regain its proper engine management, fuel delivery, and transmission control, just as the factory intended.
Simple Process & Wide Compatibility
Our goal is to make this repair as straightforward as possible. After your purchase, simply send us your vehicle’s 17-digit VIN. Our technicians will then flash the module with the correct GM calibration file for your specific truck. This service is included with your purchase. The module is then carefully packaged and shipped to you, ready for installation.
This module, identified by part number 89017733, is also a direct replacement for a wide range of other GM service numbers, ensuring broad compatibility. It fits not only the 2003 Sierra 1500 PCM but also numerous other trucks, vans, and SUVs from the same era. Please verify your part number against the list below.
Compatible Service Numbers: 12581565, 8125815650, 12570557, 12570558, 12576106, 12576869, 12578127, 8125781270, 88864822, 89017733
Verified Fitment Includes:
- 2003 Sierra/Silverado 1500, 2500, 3500 (4.3L, 8.1L Gasoline)
- 2003 Yukon XL 2500 / Suburban 2500 / Avalanche 2500 (8.1L)
- 2003 Express / Savana Vans (1500, 2500, 3500)
- 2003 Astro / Safari Vans
- 2003 S10 / Sonoma / Blazer S10 / Jimmy S15 (4.3L)
- 2004 Corvette / CTS (with ID 12581565)
Frequently Asked Questions
Do I need to have this module programmed?
No. This module comes pre-programmed to your vehicle’s specific VIN. You must provide your VIN after purchase so we can flash the unit before shipping it. It will not work without this step.
Where is the PCM located on my 2003 Sierra 1500?
On most 2003 Sierra and Silverado trucks, the PCM is located in the engine bay on the driver’s side (LH), under or near the battery tray.
Is any additional procedure needed after installation?
In many cases, you will need to perform a security relearn procedure, also known as a Passlock or anti-theft relearn. This procedure syncs the new PCM to your vehicle’s security system and can typically be done without special tools by following a series of key cycles. Instructions are widely available online.
Will this fix my check engine light?
If the check engine light and associated diagnostic trouble codes are being caused by a faulty PCM, then yes, this part will resolve the issue. It is crucial to have your vehicle properly diagnosed to confirm the PCM is the point of failure.
What happens if I install it without providing a VIN?
We cannot ship the part without your VIN. An unprogrammed module will not start or run your vehicle correctly because it lacks the specific software and security information for your truck.