Is Your GM Vehicle Running Rough, Stalling, or Throwing Confusing Codes?
If you’re dealing with frustrating and unpredictable engine problems, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, when it starts to go, it can cause a cascade of issues that seem unrelated. I’ve spent over 20 years diagnosing these exact problems on the shop floor, and the symptoms are almost always the same.
Common Symptoms of a Failing GM PCM
Does any of this sound familiar? Your vehicle might be experiencing:
- โ Stalling for no apparent reason, either while driving or at idle.
- โ Harsh, erratic, or delayed transmission shifting.
- โ A persistent Check Engine Light with codes that won’t go away (like P0601, P0606).
- โ A sudden drop in fuel economy.
- โ The engine cranks but refuses to start (no-start condition).
- โ Communication errors with your scan tool.
From the Shop Floor: A Real-World Diagnosis
“A customer’s 2004 Impala came in last week with these exact symptoms. It would stall at red lights and the transmission felt like it was getting kicked between gears. The dash was lit up with a Check Engine Light. We pulled the codes and found a P0601 – Internal Control Module Memory Check Sum Error. This code is a direct indictment of the PCM itself. After verifying the module had good power and ground connections, we knew the internal processor was failing. These PCMs, often located in the hot engine bay, endure thousands of heat cycles and constant vibration, which eventually causes microscopic cracks in the circuit board. Replacing it with this pre-programmed unit solved all the customer’s issues instantly.”
The Direct-Fit Solution: A PCM Programmed Specifically For You
Don’t waste time and money chasing down phantom sensor issues. This Powertrain Control Module is the reliable, straightforward solution. We take the guesswork out of the repair by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN). This is a critical step that many sellers skip.
Why is VIN programming so important?
- โ Ensures Compatibility: Your VIN tells us the exact engine, transmission, and options your car was built with, allowing us to load the precise GM factory software for flawless operation.
- โ Activates Anti-Theft Systems: The programming syncs the PCM with your car’s security system (Pass-Key/Passlock), preventing a no-start situation that occurs with un-programmed modules.
- โ Provides Latest Updates: We flash the module with the newest software updates from GM, which often include fixes for drivability and efficiency issues you might not even know you have.
Guaranteed Compatibility
This module, part number 89017735, is a direct replacement for original part numbers 12583827 and 12583826. It is guaranteed to fit and function correctly in the following vehicles:
- โ Alero: 2003-2004 (3.4L)
- โ Aztek: 2003-2005
- โ Bonneville: 2004-2005 (3.8L)
- โ Century: 2003-2005
- โ Grand Am: 2003-2005 (3.4L)
- โ Grand Prix: 2003 (3.1L)
- โ Impala: 2003-2005
- โ LeSabre: 2004-2005
- โ Malibu: 2003
- โ Monte Carlo: 2003-2005
- โ Montana: 2003-2005
- โ Park Avenue: 2004-2005
- โ Rendezvous: 2003-2005
- โ Silhouette: 2003-2004
- โ Venture: 2003-2005
IMPORTANT: After purchase, please provide us with your VIN. We cannot ship your order until we have programmed the module. This ensures you receive a part that works right out of the box, getting you back on the road without the need for an expensive trip to the dealership.