Is Your 2006 Montana Running Rough, Stalling, or Not Starting at All?
If you’re dealing with frustrating and unpredictable engine problems in your 2006 Montana SV6, the root cause is often the one component you can’t easily test: the Powertrain Control Module (PCM). As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing PCM can turn a reliable van into a source of constant headaches. It’s the central computer for your engine and transmission, and when it starts to go, the symptoms can be all over the map.
Common Signs of a Failing GM 3.5L PCM
The issues aren’t always a simple check engine light. A faulty module can manifest in ways that might lead you to replace perfectly good sensors or parts. Hereโs what I typically see in the shop:
- โ Unexplained stalling, either at idle or while driving.
- โ Harsh or erratic automatic transmission shifting.
- โ A complete no-start condition where the engine cranks but won’t fire up.
- โ Multiple, unrelated diagnostic trouble codes (DTCs) stored in memory.
- โ Poor fuel economy and a noticeable loss of engine power.
- โ The cooling fans running constantly, even when the engine is cold.
A Real-World Story from the Shop
“A customer’s 2006 Montana SV6 came into the shop last week with a baffling problem. It would start and run fine for about 15 minutes, then suddenly die and refuse to restart for an hour. They had already replaced the crank sensor and fuel pump with no luck. After hooking up my scan tool and monitoring live data, I saw the injector pulse width and ignition timing signals drop to zero right before it stalled. This pointed directly to an internal PCM failure, likely caused by heat soak. After it cooled down, it would work again temporarily. This kind of thermal failure is a classic symptom I’ve diagnosed on dozens of these GM platforms.”
The Direct Solution: A VIN-Programmed PCM
Replacing the PCM used to mean buying the part, installing it, and then having your vehicle towed to a dealership for expensive programming. This module eliminates that hassle. This is a genuine, tested Powertrain Control Module, part number 19210070, that we program specifically for your vehicle before it ever leaves our facility.
How does it work? It’s simple. After you complete your purchase, you provide us with your vehicle’s 17-digit VIN. We use that information to load the latest, most stable GM-certified software directly onto the module. This ensures that it communicates perfectly with your engine, transmission, anti-theft system (Passlock/VATS), and all other onboard electronics. It arrives at your door ready for installation.
Key Benefits of Our Pre-Programmed Module:
- โ No Extra Programming Needed: Save hundreds of dollars and the inconvenience of a dealership visit. This module is plug-and-play.
- โ Latest GM Software: We flash the unit with the most recent updates from General Motors, which often correct factory bugs related to shifting, idling, and fuel management.
- โ Restored Performance: A new, correctly programmed PCM is the key to resolving those strange electrical gremlins and restoring your vehicle’s original power and efficiency.
- โ Simple Installation: Located in the LH (driver’s side) front engine compartment, this module can be swapped out with basic hand tools. Just disconnect the battery, unplug the old module’s connectors, and install the new one.
Vehicle Compatibility
This module is a direct replacement for service part numbers 19210070 and 12600928. It is guaranteed to fit and function in the following vehicles:
- โ 2006 Pontiac G6 (with matching ID 12600928)
- โ 2006-2007 Buick Rendezvous (with 3.5L engine)
- โ 2006 Chevrolet Uplander (with 3.5L engine)
- โ 2006 Pontiac Torrent
- โ 2006 Chevrolet Malibu (with 3.5L engine)
- โ 2006 Chevrolet Equinox
- โ 2006 Buick Terraza (with 3.5L engine)
- โ 2006 Pontiac Montana (SV6, with 3.5L engine)
Don’t let a faulty computer keep your vehicle off the road. This is the most straightforward and reliable way to solve complex engine management issues. Provide your VIN at checkout and get the correct, ready-to-install part delivered to your door.