Restore Your Envoy’s Heartbeat and Drive with Confidence
Is your 2006 GMC Envoy XL feeling sluggish, shifting erratically, or displaying that dreaded Check Engine Light? A failing Powertrain Control Module (PCM) can be the hidden culprit behind a host of frustrating issues, turning your reliable SUV into a source of daily stress. This isn’t just about a light on the dash; it’s about the safety of your family, the reliability of your daily commute, and the peace of mind that comes from a vehicle you can trust. This direct-fit PCM, part number 19209821, is the definitive solution to bring your vehicle back to its peak operational state.
We take the guesswork and complexity out of the repair. Before this module ever leaves our facility, it is meticulously programmed with the latest official GM software updates, specifically matched to your vehicle’s unique VIN. This ensures seamless communication between your engine, transmission, and other vital systems, restoring the precise performance and efficiency you’ve been missing. Forget expensive dealership visits and complicated programming tools—this is the straightforward, reliable fix you need to get back on the road with certainty.
Warning Signs and How to Overcome Them
If you’re experiencing any of the following, a faulty PCM is a likely cause. Replacing it can restore your vehicle’s health and your driving enjoyment.
- ✔ Persistent Check Engine Light: Often with communication error codes like U0100 or internal fault codes such as P0601, P0606, or P060A.
- ✔ Poor Fuel Economy: An inefficient engine burns more gas. This module restores the correct air-fuel mixture for optimal mileage.
- ✔ Rough or Erratic Shifting: The PCM controls transmission logic. A new module ensures smooth, predictable gear changes.
- ✔ Engine Stalling or No-Start: The most critical symptom. A failing computer can leave you stranded without warning.
- ✔ Failed Emissions Test: Proper engine management is key to passing state inspections.
Guided Installation to Restore Peace of Mind
You don’t need to be a master mechanic to complete this repair. With basic hand tools and a little patience, you can have your Envoy running smoothly again. Our pre-programmed module makes the process as simple as possible.
- Safety First: Begin by disconnecting the negative terminal on your vehicle’s battery to prevent any electrical shorts.
- Locate the Old Module: On your 2006 Envoy XL, the PCM is typically located on the driver’s side of the engine compartment, mounted to the inner fender or firewall.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that may need to be gently pried up. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed 2006 Envoy XL PCM in the exact same location. Reconnect the electrical harnesses, ensuring they click securely into place.
- Power Up: Reconnect the negative battery terminal. In many cases, the vehicle will start right up. Some vehicles may require a simple security relearn procedure, which can be done without special tools and instructions can easily be found online.
An Expert’s Diagnostic Story
“I once had a 2006 Trailblazer (which shares this exact PCM) come into the shop with a no-start condition that had stumped two other mechanics. They had replaced the fuel pump and crank sensor, but the engine would only crank. After checking the basics, I noticed a faint burning smell near the PCM. It turned out a corroded ground wire on the engine block had caused a voltage spike that internally damaged the old computer. We replaced the faulty ground, installed a newly programmed PCM, and it fired up on the first try. It’s a powerful reminder: the PCM is the brain, but always check its connections and grounds for a complete, lasting repair.”
Guaranteed Compatibility for Your Vehicle
This module is a direct replacement for a wide range of GM vehicles and part numbers. Please verify that your vehicle and original part number are listed below. This part will fit these makes and models with these options:
- COLORADO 04-06 Electronic Control Module; (RH firewall)
- RAINIER 06 Electronic Control Module; (LH engine), 4.2L
- HUMMER H3 06 Electronic Control Module; (RH firewall)
- ISUZU ASCENDER 06 Electronic Control Module; 4.2L (LH engine)
- ISUZU I-350 06 Electronic Control Module; (RH firewall)
- TRAILBLAZER 06 Electronic Control Module; (LH engine), 4.2L
- TRAILBLAZER EXT 06 Electronic Control Module; (LH engine), 4.2L
- ENVOY XL 06 Electronic Control Module; (LH engine), 4.2L
- ISUZU I-280 06 Electronic Control Module; (RH firewall)
- SAAB 9-7X 06 Electronic Control Module; (LH engine), 6 cylinder, ID 12569773 or 12597521
- CANYON 04-06 Electronic Control Module; (RH firewall)
- ENVOY 06 Electronic Control Module; 4.2L (LH engine)
This unit replaces the following part numbers: 12569773, 12588650, 12589311, 12589585, 12591647, 12591648, 12593531, 12593532, 12594430, 12594431, 12596783, 12596784, 12597521, 12597776, 12597777, 12600818, 12604438, 12604439, 12606369, 12606373, 12606374, 12606398, 12606399, 19209820, 19209821. Ordering our programmed 2006 Envoy XL PCM ensures you get the right part, ready to install.
Frequently Asked Questions
What information do you need from me?
After you place your order, we will need your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to load the correct, vehicle-specific software and updates onto your new module.
Is this module truly plug-and-play?
Yes, for the vast majority of vehicles. Because we program it to your VIN, it’s ready for installation right out of the box. Some models may require a simple security relearn procedure (also known as a CASE relearn), which takes about 30 minutes and does not require any special tools.
Will this fix my specific problem?
This PCM is a direct solution for issues caused by a failing computer, such as internal processor faults (P0601, P0606) and communication errors. While it resolves a wide range of symptoms, we always recommend a proper diagnosis to ensure you are not replacing a part due to an issue elsewhere, like a bad sensor or wiring.
Do I need to send my old PCM (core) back?
No core charge or return is required for this part. You can keep your old module or recycle it locally.
What kind of warranty is included?
This unit comes with a Lifetime Warranty, covering any defects in the module itself. We stand behind our programming and the quality of our components, giving you ultimate peace of mind with your purchase.