Is your Chevrolet Colorado or GMC Canyon suddenly running rough, refusing to start, or flashing a persistent check engine light? The frustration of an unreliable truck can disrupt your entire life. The Powertrain Control Module (PCM) is the brain of your vehicle, and when it fails, it can cause a cascade of confusing and concerning issues. This isn’t just an inconvenience; it’s a matter of confidence and safety. We’re here to provide the definitive, hassle-free solution: a fully programmed PCM, ready to restore your truck’s performance and your peace of mind.
This isn’t just a replacement part; it’s a complete remedy. Each module is meticulously flashed with the latest GM software updates specifically for your truck’s Vehicle Identification Number (VIN). This critical step ensures seamless communication between all your vehicle’s systems, eliminating the need for an expensive trip to the dealership for programming. You get a component that’s truly plug-and-play, designed to get you back on the road quickly and confidently.
From a Seasoned Tech’s Notebook
I remember a customer, Mark, with a 2005 Canyon that was his daily workhorse. It suddenly developed a no-start condition out of the blue. He’d replaced the battery and checked the fuel pump, but nothing worked. The codes were all over the place, pointing to a communication breakdown. He was stressed, losing work, and facing a hefty diagnostic bill. We sent him a VIN-programmed PCM. He called back the next day, ecstatic. The truck fired up on the first try. The relief in his voice was palpable—it wasn’t just about fixing a truck; it was about getting his livelihood and his dependable partner back.
Warning Signs and How to Overcome Them
If your truck is experiencing any of the following, a failing PCM could be the culprit. Replacing it with our pre-programmed unit is the direct path to resolving these issues:
- ✔ Check Engine Light On: Often with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606.
- ✔ No-Start or Hard-Start Condition: The engine cranks but refuses to start, or struggles to turn over.
- ✔ Erratic Shifting or Transmission Problems: The transmission may shift harshly, get stuck in a gear, or feel unresponsive.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in MPG can indicate the engine isn’t being managed correctly.
- ✔ Engine Stalling or Misfiring: The engine may stall intermittently or run rough, as if it’s not getting the right fuel or spark commands.
- ✔ Failed Emissions Test: An improperly functioning PCM can prevent the vehicle from passing state-mandated emissions inspections.
Guided Installation for a Confident Fix
You don’t need to be a master mechanic to complete this job. With basic tools and a little patience, you can have your truck running smoothly again. Here’s a general guide to get you started:
- Safety First: Begin by disconnecting the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most 2004-2006 Colorado and Canyon models, the PCM is located in the engine bay, on the right-hand (passenger side) firewall.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and gently pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or damaged pins.
- Remove the Old PCM: Unbolt the mounting hardware that secures the old module to the firewall and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed 2004-2006 Colorado PCM in the same location, securing it with the original hardware.
- Reconnect Everything: Firmly plug the electrical harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: In some cases, a simple security relearn procedure is needed. 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. Your vehicle’s manual may have specific instructions.
Tailored Fit for Your Ride
This module is a direct replacement for a wide range of vehicles and part numbers, ensuring precise compatibility. Please verify your vehicle is on the list below:
- CHEVROLET COLORADO: 2004-2006 (Electronic Control Module; RH firewall)
- GMC CANYON: 2004-2006 (Electronic Control Module; RH firewall)
- HUMMER H3: 2006 (Electronic Control Module; RH firewall)
- BUICK RAINIER: 2006 (Electronic Control Module; LH engine, 4.2L)
- CHEVROLET TRAILBLAZER: 2006 (Electronic Control Module; LH engine, 4.2L)
- CHEVROLET TRAILBLAZER EXT: 2006 (Electronic Control Module; LH engine, 4.2L)
- GMC ENVOY: 2006 (Electronic Control Module; 4.2L, LH engine)
- GMC ENVOY XL: 2006 (Electronic Control Module; LH engine, 4.2L)
- ISUZU ASCENDER: 2006 (Electronic Control Module; 4.2L, LH engine)
- ISUZU I-280: 2006 (Electronic Control Module; RH firewall)
- ISUZU I-350: 2006 (Electronic Control Module; RH firewall)
- SAAB 9-7X: 2006 (Electronic Control Module; LH engine, 6 cylinder)
This unit replaces 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.
Frequently Asked Questions
Do I need to program this module?
No, you don’t! That’s the primary benefit of our service. We program the module to the specific VIN you provide before shipping, so it arrives ready for installation.
How do I provide my vehicle’s VIN?
After you complete your purchase, you can add your VIN to the order notes or simply reply to your order confirmation email. We will not ship the part until we have your VIN to ensure a perfect match.
Will I need to do anything special after installing it?
In many cases, you may need to perform a simple security relearn procedure, also known as a ‘key-on/key-off’ cycle. This allows the PCM to sync with your vehicle’s anti-theft system. It’s a straightforward process you can do in your driveway with no special tools.
My original part number is slightly different but my truck is on the list. Will this work?
Yes. This PCM is a correct replacement for all the part numbers listed in the description. As long as your make, model, and year match our compatibility list, this module is the correct fit for your vehicle.
What if this doesn’t fix my problem?
While this pre-programmed 2004-2006 Colorado PCM is the solution for a wide range of electronic issues, proper vehicle diagnosis is key. We stand by our products, but it’s important to confirm the PCM is the faulty component. If you have any questions, our expert team is here to help.