Programmed 2001-2003 Grand Prix PCM 12202600 | Engine Computer ECM

End Your Engine Troubles for Good

Fix stalling, rough idle, and check engine light issues with this Powertrain Control Module for your 2001-2003 Grand Prix. It comes fully programmed to your vehicle’s VIN with the latest GM software, eliminating the need for a costly trip to the dealership. This is a direct-fit, reliable solution to restore your car’s performance. Get your car running smoothly again—order today!

$74.99

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-03160-21 Categories: ,
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Restore Peak Performance to Your Pontiac Grand Prix

Is your 2001-2003 Grand Prix suffering from frustrating issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle’s engine. A faulty PCM can disrupt everything from fuel delivery and spark timing to transmission shifting, making your car unreliable and frustrating to drive. This isn’t just an inconvenience; it can affect your vehicle’s safety and long-term health. Don’t let a bad computer dictate your car’s performance.

We offer a dependable and straightforward solution. This PCM, part number 12202600, is a direct-fit replacement for your original unit. The best part? We take care of the most critical step for you. Before we ship it, we will program the module with the latest GM factory software updates, using the specific Vehicle Identification Number (VIN) from your car. This ensures perfect communication between the module and your vehicle’s systems, often correcting underlying drivability problems that the original software may have had. With a properly functioning 2001-2003 Grand Prix PCM, you can restore the smooth, reliable operation you expect from your vehicle.

Case Study: The Ghost in the Grand Prix

I remember a 2002 Grand Prix with the 3.1L that came into my shop with a problem that was driving the owner crazy. It had an intermittent no-start condition with no check engine light. One day it would start fine, the next it would just crank and crank. We checked fuel pressure, spark, and all the usual suspects—everything tested perfectly. After hours of diagnostic work, we noticed that when the car wouldn’t start, our professional scan tool couldn’t communicate with the PCM. This pointed to an internal failure in the module itself. We installed a VIN-programmed PCM, and the problem vanished instantly. It’s a textbook example of how a failing computer can create phantom issues that are nearly impossible to trace without experience.

Common Signs of a Failing PCM in Your GM Car

  • âś” Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error), P0604 (Internal Control Module RAM Error), or P0606 (ECM/PCM Processor Fault).
  • âś” The engine cranks but refuses to start.
  • âś” Unexplained drops in fuel efficiency.
  • âś” The engine runs rough, misfires, or stalls unexpectedly.
  • âś” Harsh or erratic automatic transmission shifting.
  • âś” Loss of communication with the module when using a scan tool.

A Straightforward Guide to Your PCM Swap

Installing your replacement PCM is a manageable job for a DIYer with basic tools. Following these steps will help ensure a smooth process.

  1. Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
  2. Locate the PCM: On most of these GM vehicles, the PCM is located in the engine compartment, often on the driver’s side, inside the air filter box housing.
  3. Disconnect the Connectors: Carefully unclip and remove the electrical wiring harnesses from the old PCM. The levers on the connectors must be fully released before you attempt to pull them out.
  4. Remove the Old Module: Unbolt the PCM from its mounting bracket or housing and remove it from the vehicle.
  5. Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and secure it.
  6. Reconnect Everything: Firmly plug the wiring harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
  7. Perform CASE Relearn (If Necessary): While the module is programmed to your VIN, a Crankshaft Variation (CASE) relearn procedure may be required with a capable scan tool to prevent a P1336 trouble code. Many vehicles will operate correctly without it, but for optimal performance, this final step is recommended.

Confirmed Vehicle Compatibility List

This module is a direct replacement for part numbers 12202600, 12209614, and 09360210. It is confirmed to fit the following vehicles and engine configurations. Please verify your vehicle’s details before ordering.

  • Alero: 2001-2003 (3.4L)
  • Aurora: 2001-2002 (3.5L)
  • Aztek: 2001-2003
  • Century: 2001-2002
  • Grand Am: 2001-2003 (3.4L)
  • Grand Prix: 2001-2002 (3.1L), 2003 (3.1L, ID 12209614)
  • Impala: 2001-2003 (3.4L)
  • Intrigue: 2001-2002
  • Lumina Car: 2001
  • Malibu: 2001-2003
  • Monte Carlo: 2001-2003 (3.4L)
  • Montana: 2001-2002
  • Regal: 2000-2002 (ID 12209614)
  • Rendezvous: 2002-2003
  • Silhouette: 2001-2002
  • Venture: 2001-2003

By purchasing this pre-programmed 2001-2003 Grand Prix PCM, you’re not just buying a part; you’re getting a reliable, time-saving solution that restores your vehicle’s core functionality. Let’s get your car back on the road where it belongs.

Frequently Asked Questions

Do I need to do any programming myself?

No. We program the module to your car’s VIN before shipping. It arrives ready for installation. In some cases, a CASE relearn procedure may be needed with a scan tool for optimal performance, but the core programming is complete.

Where do I provide my VIN?

After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship the module until we have this information to ensure correct programming.

Is this a brand new part?

This is a high-quality, tested, and verified replacement part that has been professionally prepared and programmed to meet or exceed original factory specifications.

Will this fix my check engine light?

If the check engine light is caused by an internal PCM failure (like codes P0601, P0604, P0606), then yes, this module will resolve the issue. However, if the light is on due to a faulty sensor or another component, that part will still need to be repaired.

What if I have a different part number on my old module?

This module is a direct replacement for part numbers 12202600, 12209614, and 09360210. As long as your vehicle is on the compatibility list, this module will function correctly.

Condition

Refurbished

MPN

12202600

Conditions & Options

Programmed to your VIN GM: 12209614

Genuine OEM

Yes

PartNumber

590

Model

Grand Prix

Year

2003

Brand

GM

Manufacturer Part Number

, ,

Interchange part number

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