Programmed 2006 Montana PCM | Powertrain Control Module 12600928

End Your Engine Headaches for Good.

Tired of a rough idle, poor fuel economy, or a stubborn check engine light? This Powertrain Control Module (PCM) is the reliable solution. It arrives fully programmed to your vehicle’s VIN with the latest GM software, eliminating the need for a costly dealership visit. Simply install it and restore your vehicle’s performance and drivability. Order today for a plug-and-play fix!

$114.99

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-00140-9 Categories: ,
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Restore Your Vehicle’s Core Performance and Reliability

If you’re dealing with a persistent Check Engine Light, erratic engine behavior, or transmission shifting problems in your 2006 Pontiac Montana or other compatible GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As the ‘brain’ of your vehicle, the PCM controls everything from fuel mixture and ignition timing to transmission shift points. When it falters, the symptoms can be frustrating and difficult to diagnose. I’ve seen countless vehicles in my bay with issues that stumped other mechanics, only to trace it back to a faulty PCM. This isn’t just a part; it’s the central command unit for your engine’s health and efficiency.

We take the guesswork and hassle out of the replacement process. This genuine GM service PCM, part number 12600928, arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest, most stable software updates directly from GM, ensuring optimal performance and resolving software-related bugs that may have existed in the original unit. This means no expensive trips to the dealership for programming—it’s a true plug-and-play solution designed to get you back on the road quickly and confidently.

From the Diagnostic Bay

I remember a 2006 Chevy Uplander—which uses the same 3.5L engine and PCM as the Montana—that came into my shop with a bizarre, intermittent no-start condition. The owner had already replaced the battery, starter, and fuel pump. Scans showed no consistent trouble codes, just a mess of communication errors that would appear and vanish. After checking the main power and ground circuits to the module, I suspected the PCM itself was failing internally. We installed one of our VIN-programmed PCMs, and the problem was solved instantly. The updated GM software also smoothed out a slight transmission shudder the owner hadn’t even mentioned. It’s a perfect example of how a quality, correctly programmed 2006 Montana PCM is the right fix.

Common Signs of a Failing Control Module

  • ✔ Persistent Check Engine Light (CEL)
  • ✔ Stored diagnostic trouble codes (DTCs) such as P0601 (Internal Control Module Memory Check Sum Error), P0605 (Internal Control Module ROM Error), or P0606 (ECM/PCM Processor Fault)
  • ✔ Poor engine performance, including rough idling, stalling, or hesitation
  • ✔ Decreased fuel economy
  • ✔ Harsh or erratic automatic transmission shifting
  • ✔ Engine fails to start or cranks but won’t turn over
  • ✔ Failure to pass state emissions testing

A Straightforward Guide to Installation

  1. ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
  2. ✔ Locate the PCM: On most of these models, the PCM is located in the engine compartment, typically on the driver’s side near the air filter housing.
  3. ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the electrical wiring harnesses from the old module. Avoid forcing them.
  4. ✔ Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you may need to reuse it.
  5. ✔ Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and secure it with the bolts.
  6. ✔ Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
  7. ✔ Perform Relearn (If Necessary): While our programming handles the heavy lifting, some vehicles require a security or crank-relearn procedure. This can often be done without special tools. A common method is to turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeat three times before starting the engine.

Will This Fit My Vehicle?

This module is a direct-fit replacement for the following vehicles equipped with the specified options. Please verify your part number (12600928 or 19210070) or contact us with your VIN to confirm compatibility.

  • ✔ 2006 Pontiac G6 (Electronic Control Module; ID 12600928)
  • ✔ 2006-2007 Buick Rendezvous (3.5L)
  • ✔ 2006 Chevrolet Uplander (3.5L)
  • ✔ 2006 Pontiac Torrent
  • ✔ 2006 Chevrolet Malibu (3.5L)
  • ✔ 2006 Chevrolet Equinox
  • ✔ 2006 Buick Terraza (3.5L)
  • ✔ 2006 Pontiac Montana SV6 (3.5L)

Frequently Asked Questions

Do I need to do any programming myself?

No. We handle all the programming before shipping. We use your VIN to load the latest GM-certified software, so the module is ready for installation right out of the box.

Where 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 the part until we receive this information.

Will this fix my transmission problems?

In many cases, yes. The PCM also controls transmission functions, so erratic shifting is a very common symptom of a failing module. A new, correctly programmed PCM often resolves these issues.

Is this a simple DIY job?

For someone with basic mechanical skills, this is a very manageable job. The most important part is ensuring the battery is disconnected and the connectors are handled carefully. Since no programming is needed, it saves a significant amount of complexity and cost.

What if my part number is 19210070?

This module, service number 12600928, is the correct and updated replacement for service number 19210070. It is fully compatible.

Condition

Refurbished

Year
MPN

12600928

Genuine OEM

Yes

PartNumber

590

Model

MONTANA

Year

2006

Brand

GM

Manufacturer Part Number

,

Interchange part number

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