Is Your Tahoe Running Rough? Get a Reliable, Programmed Solution.
If you’re dealing with a frustrating check engine light, poor fuel economy, stalling, or erratic shifting in your 2003-2006 Chevrolet Tahoe, a failing Powertrain Control Module (PCM) is a very likely culprit. As the central computer for your engine and transmission, its health is critical. When it starts to fail, it can create a cascade of confusing problems. This isn’t just a replacement part; it’s the permanent fix you’ve been looking for, delivered ready for installation.
The Simple, No-Hassle Repair You Need
Forget about expensive dealership visits and the headache of towing your truck for programming. We handle the critical software step for you. Before we ship your module, our technicians will flash it with the latest GM-certified software updates, precisely matched to your vehicle using the VIN you provide. This ensures your 2003-2006 Tahoe PCM communicates perfectly with your vehicle’s systems right out of the box.
Common Symptoms of a Failing GM PCM:
- โ Persistent Check Engine Light (CEL)
- โ Vehicle won’t start or stalls unexpectedly
- โ Harsh or delayed transmission shifting
- โ Noticeable decrease in fuel mileage
- โ Communication errors with scan tools
- โ False sensor codes that return after clearing
From My 20+ Years in the Shop…
A customer’s 2004 Tahoe came in last week with a no-start condition and a whole list of communication codes. They had already replaced the fuel pump and crankshaft position sensor with no luck. After a quick check, I found the 5-volt reference signal from the PCM was dead, which was knocking out multiple sensors at once. A failing PCM can mimic many other part failures. We installed one of our pre-programmed modules, and the truck fired right up and has been running perfectly ever since. Always check the basics, but don’t be surprised if the trail leads back to the brain of the operation.
Plug-and-Play Installation: No Dealer Visit Required
Installing your replacement 2003-2006 Tahoe PCM is a straightforward job you can do in your own driveway. Follow these simple steps to get your truck back to factory-spec performance.
- Safety First: Disconnect the negative battery terminal and secure it away from the post.
- Locate the PCM: On most of these GM trucks and SUVs, the PCM is located in the engine bay on the driver’s side, under or next to the battery tray.
- Disconnect Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s typically held in by a few small bolts.
- Install the New Module: Mount your new, pre-programmed PCM and securely tighten the bolts.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new module until they click. Reconnect your negative battery terminal.
- Final Step: In some cases, a security relearn procedure may be necessary. This can typically be done by turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine.
Guaranteed Compatibility
This module is a direct replacement for service part numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802, ensuring it will work for the wide range of compatible GM vehicles listed. Just provide your VIN at checkout, and we’ll ensure it’s a perfect match for your specific vehicle configuration.