Restore Peak Performance to Your GM Vehicle
Is your 2006 Buick Terraza or other compatible GM vehicle suffering from a persistent check engine light, erratic transmission shifting, or a frustrating no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your engine and transmission. A faulty PCM can cripple your vehicle’s performance, fuel economy, and reliability. This replacement PCM, part number 19210070, is the definitive solution to get you back on the road with confidence.
Unlike generic modules that require expensive dealership programming, this unit 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 from General Motors, often correcting factory flaws the original module may have had. This isn’t just a replacement; it’s a direct, effective fix that restores your vehicle’s original functionality and efficiency.
From the Diagnostic Bay: The Intermittent Gremlin
A customer brought in a 2006 Chevy Uplander—same platform as the Terraza—with a truly maddening problem. It would randomly refuse to start, but only when warm. Other times, it would shift harshly from first to second gear. There were no consistent trouble codes, just a generic U0100 (Lost Communication with ECM/PCM) that would pop up occasionally. After hours of chasing wires and checking grounds, we scoped the PCM’s power and data lines. We found that the module’s internal voltage regulator was failing under heat soak, causing it to drop communication intermittently. We installed one of these VIN-programmed PCMs. The customer called a week later, overjoyed that the gremlin was gone for good. This simple swap saved them from what could have been weeks of frustrating, and expensive, diagnostic guesswork.
Is Your Vehicle Showing These Signs of PCM Failure?
A failing PCM can cause a wide range of issues. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Stored diagnostic trouble codes (DTCs) like P0601, P0602, P0606, or U0100
- ✔ Vehicle won’t start or starts intermittently
- ✔ Poor engine performance or sudden drops in power
- ✔ Decreased fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to pass state emissions testing
A Straightforward Guide to Installation
Installing your new 2006 Terraza PCM is a manageable job for a DIY enthusiast. By having the module pre-programmed, you skip the most complicated and expensive step. Always consult a repair manual for your specific vehicle, but here is a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the PCM: On most of these GM models, the PCM is located in the engine compartment on the driver’s side, often near the air filter housing.
- Disconnect the Connectors: Carefully unclip and remove the electrical wiring harnesses from the old PCM. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed PCM into place and securely re-attach the wiring harnesses. Ensure they click into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Perform Security Relearn (If Needed): In some cases, you may need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. This allows the new PCM to sync with your vehicle’s anti-theft system.
Verified Vehicle Compatibility
This module is a direct-fit replacement for several GM vehicles. Please verify your vehicle and engine options below. This part is a direct replacement for service numbers 19210070 and 12600928.
- Buick Rendezvous: 2006-2007 (3.5L)
- Buick Terraza: 2006 (3.5L)
- Chevrolet Equinox: 2006
- Chevrolet Malibu: 2006 (3.5L)
- Chevrolet Uplander: 2006 (3.5L)
- Pontiac G6: 2006 (with ID 12600928)
- Pontiac Montana: 2006 (SV6, 3.5L)
- Pontiac Torrent: 2006
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to program the Powertrain Control Module with the exact software and calibrations specific to your vehicle’s engine, transmission, and options. This ensures perfect compatibility and function right out of the box.
Is this part difficult to install?
For someone with basic mechanical skills, the physical installation is straightforward. It involves disconnecting the battery, unplugging the old module, and plugging in the new one. Since we pre-program it, you avoid the complex computer programming step required by dealerships.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM (e.g., codes P0601, P0606), then yes, this part will resolve the issue. It’s crucial to properly diagnose the cause of the light first, as it could also be a faulty sensor or wiring problem.
What is a “security relearn” procedure?
A security relearn syncs the new PCM with your vehicle’s anti-theft system. On most GM vehicles, it’s a simple process of cycling the ignition key that you can do yourself in about 30 minutes. Instructions are widely available online for your specific model.
Is this a brand new part?
This is a high-quality, tested, and verified replacement part that is guaranteed to perform to OEM standards. It is programmed with the latest GM software to ensure reliability and correct known issues.