Restore Your Truck’s Brain and Get Back on the Road
Is your 2004-2006 GMC Canyon or Chevy Colorado running rough, refusing to start, or throwing a frustrating Check Engine Light? As a technician with over two decades of experience, I know the headaches a failing Powertrain Control Module (PCM) can cause. It’s the central computer of your vehicle, managing everything from fuel delivery and spark timing to transmission shifting. When it falters, your truck’s reliability disappears. This isn’t just an inconvenience; it can leave you stranded.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We provide a high-quality PCM, part number 12569773, that is professionally programmed with the latest GM software updates specifically for your truck. All we need is your Vehicle Identification Number (VIN) at checkout. This critical step ensures that when the module arrives, it’s a true plug-and-play component. You can bypass expensive dealership programming fees and lengthy service appointments. This is the direct, effective fix that both professional mechanics and DIY enthusiasts trust to restore factory performance and dependability.
From the Diagnostic Bay: The Intermittent No-Start Mystery
I once had a 2005 Canyon in my shop that was a real head-scratcher. The owner said it would randomly fail to start, but only after it was warm. There were no consistent trouble codes, just a generic network communication error that would pop up occasionally. We checked the battery, starter, and fuel pump—all were fine. After hours of diagnostics, I noticed a slight voltage drop at the PCM connectors during cranking. On a hunch, we swapped in a known-good, correctly programmed PCM. The problem vanished instantly. The original module had an internal hairline fracture that only separated when the unit heated up. It’s a classic example of how a failing 2004-2006 Canyon PCM can create baffling symptoms that look like something else entirely.
Is Your Truck Showing These Symptoms?
- âś” Unexplained Check Engine Light illumination.
- âś” Vehicle refuses to start or has intermittent starting issues.
- âś” Poor or erratic automatic transmission shifting.
- âś” A noticeable drop in fuel economy.
- âś” Engine stalling, sputtering, or misfiring.
- âś” Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0606, or U0100.
A Straightforward Guide to Installation
- âś” Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to ensure all systems are powered down.
- âś” Locate the PCM: On the Canyon, Colorado, and Hummer H3, the PCM is typically located on the right-hand (passenger side) firewall in the engine bay. On Trailblazer/Envoy platforms, it’s often on the left-hand (driver’s side) of the engine.
- âś” Disconnect the Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old module. Inspect them for any corrosion or damage.
- âś” Remove the Old Module: Unbolt the old PCM from its mounting bracket. It’s usually held in place by a few small bolts.
- âś” Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely fasten the bolts.
- âś” Reconnect Everything: Firmly plug the wiring harness connectors into the new module until they click into place. Reconnect the negative battery terminal.
- âś” Perform Security Relearn (If Needed): In many cases, the vehicle will start right up. However, some GM vehicles require a simple 10-minute key-cycle security relearn procedure. Turn the key to the ‘ON’ position for 10 minutes (do not start), then ‘OFF’ for 10 seconds, and repeat two more times. Your truck should now start and run correctly.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM vehicles and interchanges with numerous part numbers, ensuring you get the right component. Please verify your model and options below.
- GMC Canyon: 2004-2006 (RH firewall)
- Chevrolet Colorado: 2004-2006 (RH firewall)
- Hummer H3: 2006 (RH firewall)
- Buick Rainier: 2006 (4.2L, LH engine)
- Chevrolet Trailblazer & Trailblazer EXT: 2006 (4.2L, LH engine)
- GMC Envoy & Envoy XL: 2006 (4.2L, LH engine)
- Isuzu Ascender: 2006 (4.2L, LH engine)
- Isuzu i-280: 2006 (RH firewall)
- Isuzu i-350: 2006 (RH firewall)
- Saab 9-7X: 2006 (6 cylinder, ID 12569773 or 12597521)
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.