Restore Peak Performance to Your GM Vehicle
Is your 2006 Pontiac Montana, Chevy Uplander, or Buick Rendezvous suddenly stalling, shifting erratically, or showing a persistent Check Engine Light? As a technician with over two decades of experience under the hood, I’ve seen these exact symptoms countless times. The culprit is often a failing Powertrain Control Module (PCM), the central computer that manages everything from fuel injection to transmission shifting. A faulty PCM can turn a reliable vehicle into a constant source of frustration. This isn’t just an inconvenience; it’s a critical component failure that can leave you stranded.
This is your direct-fit, reliable solution. We offer a genuine GM service part PCM (Part No. 12600928) that arrives at your doorstep fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest GM software updates, ensuring it communicates flawlessly with your vehicle’s other systems right out of the box. This process eliminates the need for an expensive trip to the dealership for programming, saving you significant time and money. By providing a precisely matched module, we help you fix the problem correctly the first time, restoring the smooth performance and fuel efficiency you depend on.
From the Diagnostic Bay: The Ghost in the Minivan
I remember a 2006 Chevy Uplander that came into my shop a few years back. The owner was at their wit’s end. They’d been to two other garages for an intermittent no-start and random stalling issue that never set a consistent trouble code. We checked fuel pressure, ignition components, and wiring harnesses—all were fine. On a hunch, I monitored the PCM’s data stream during a long test drive. Just before it stalled, I saw the 5-volt reference signal flicker. Back at the shop, a tap test on the PCM housing caused the engine to stumble. The internal circuits were failing under heat and vibration. We installed a VIN-programmed 2006 Montana Powertrain Control Module (the same part number, 12600928), and the van ran perfectly. It’s a classic example of how these modules can fail in ways that are tough to diagnose without hands-on experience.
Common Signs of a Failing PCM
- âś” Check Engine Light is on with communication error codes like P0601, P0602, or P0606.
- âś” The engine cranks but refuses to start.
- âś” Unexplained stalling or rough idling.
- âś” Noticeable decrease in fuel economy.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Misfire codes that persist even after replacing spark plugs and coils.
- âś” Other warning lights (like ABS or Traction Control) illuminate unexpectedly.
A Straightforward Guide to Installation
Replacing the PCM is a job most DIYers with basic tools can handle. The key is our VIN programming, which makes this a true plug-and-play repair. As a reference, this is the general procedure for many of the compatible vehicles.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the Module: On most of these vehicles, the PCM is located in the left-hand (driver’s side) front of the engine compartment, often near the air filter housing.
- Disconnect Connectors: Carefully release the locking tabs and unplug the electrical wiring harnesses from the old PCM. Inspect the connectors for any corrosion or damage.
- Remove the Old PCM: Unbolt the mounting hardware holding the old module in place and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: You will need to perform a security relearn procedure (often called a CASE relearn or Passlock relearn) to sync the new PCM with your vehicle’s anti-theft system. This procedure typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating a few times. Specific instructions are easily found online for your model.
Will This Fit My GM Vehicle?
This 2006 Montana Powertrain Control Module is guaranteed to be a direct-fit replacement for the following vehicles and options. Please verify your part number (12600928 or 19210070) or contact us with your VIN if you are unsure.
- Pontiac G6: 2006 (with ID 12600928)
- Buick Rendezvous: 2006-2007 (3.5L Engine)
- Chevrolet Uplander: 2006 (3.5L Engine)
- Pontiac Torrent: 2006
- Chevrolet Malibu: 2006 (3.5L Engine)
- Chevrolet Equinox: 2006
- Buick Terraza: 2006 (3.5L Engine)
- Pontiac Montana: 2006 (SV6, 3.5L Engine)
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming after I receive this PCM?
No! We program the module to your specific VIN before shipping. However, you will need to perform a simple key/security relearn procedure, which does not require any special tools.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information.
Is this a new or used part?
This is a high-quality, tested, and verified genuine GM service part that meets or exceeds original equipment specifications. It is flashed with the latest software for optimal performance.
Will this fix my P0601 code?
Yes, the DTC P0601 (Internal Control Module Memory Check Sum Error) is a direct indication of an internal PCM failure. Replacing the module is the correct and definitive repair for this code.
What is the warranty on this part?
This part comes with a comprehensive warranty against any programming or hardware defects. Please see our warranty policy page for complete details.
Is a core charge required?
No, there is no core charge for this part. You do not need to send your old, failed module back to us.