2006 Chevrolet Trailblazer Powertrain Control Module (PCM) 12569773 – Programmed to Your VIN

As a seasoned automotive repair advisor with over two decades in diagnostics and parts, I’ve seen countless Chevy Trailblazer owners face frustrating engine glitches. If your 2006 Trailblazer is throwing codes or stalling unexpectedly, a faulty PCM could be the culprit. This pre-programmed powertrain control module, part number 12569773, arrives flashed with the latest GM updates tailored to your VIN—ensuring seamless integration and peak performance. Let’s dive into how this fixes real-world problems and gets you back on the road.

Key Features & Benefits

This PCM isn’t just a replacement—it’s optimized for your specific vehicle. We program it using your provided VIN, incorporating the newest GM software to address known vulnerabilities. That means improved fuel efficiency, smoother shifting, and reliable engine management, especially during demanding drives like off-road adventures or heavy loads.

• VIN-Specific Programming: Matches your Trailblazer’s exact specs for plug-and-play ease.
• Latest GM Updates: Fixes software bugs that cause erratic idling or poor throttle response.
• Broad Compatibility: Replaces multiple part numbers including 12588650, 12589311, 12589585, and more up to 19209821.
• Enhanced Reliability: Boosts overall drivability, reducing the risk of breakdowns in tough conditions.

Imagine heading out for a weekend trail run, only for your engine to hesitate on a steep incline. With this updated PCM, those worries fade, delivering consistent power and better diagnostics to keep your check engine light at bay.

Common Issues & How This Fixes Them

From my experience working on GM vehicles like the 2006 Trailblazer, PCM failures often stem from electrical surges, heat exposure, or age-related wear. Symptoms include rough idling, sudden power loss, or failure to start—common in models with the 4.2L engine.

One frequent scenario: You’re cruising on the highway when the engine cuts out, triggering DTCs like P0601 (internal control module memory error) or P2135 (throttle position sensor issues). This happens because the original PCM can corrupt over time, misreading sensor data. Replacing it with our programmed unit clears these codes by restoring accurate communication between the engine, transmission, and emissions systems.

Another issue I’ve diagnosed: Intermittent stalling during wet weather, often linked to DTC P0120 or P0220 from faulty throttle control. The updated software in this PCM recalibrates these functions, preventing moisture-related glitches and ensuring steady performance.

Expert Tip: Before swapping, scan for codes with an OBD-II tool. If you see P0606 (ECM/PCM processor fault), this module resolves it by providing a stable processing core. In my shop days, I’ve fixed dozens of Trailblazers this way, saving owners from costly tow bills.

Easy Installation Guide

Swapping the PCM in your 2006 Trailblazer is straightforward for DIYers with basic tools. Located on the left side of the engine compartment (LH engine area), it’s accessible without major disassembly.

1. Disconnect the battery to avoid electrical shorts.
2. Locate the module—it’s mounted near the firewall.
3. Unplug the connectors, remove mounting bolts, and swap in the new unit.
4. Reconnect everything, then clear any stored codes with a scanner.
5. Start the engine; the pre-programmed PCM should sync immediately.

Pro Tip: If you’re not comfortable, a local mechanic can handle it in under an hour. Always double-check connections to prevent new issues like DTC U0100 (lost communication).

Fitment Details

This PCM is designed for precise fitment in various GM and related models, ensuring versatility without compatibility headaches.

Compatible with:

• 2006 Chevrolet Trailblazer (LH engine, 4.2L)
• 2006 Chevrolet Trailblazer EXT (LH engine, 4.2L)
• 2004-2006 Chevrolet Colorado (RH firewall)
• 2006 Buick Rainier (LH engine, 4.2L)
• 2006 Hummer H3 (RH firewall)
• 2006 Isuzu Ascender (LH engine, 4.2L)
• 2006 Isuzu I-350 (RH firewall)
• 2006 Isuzu I-280 (RH firewall)
• 2006 GMC Envoy (LH engine, 4.2L)
• 2006 GMC Envoy XL (LH engine, 4.2L)
• 2004-2006 GMC Canyon (RH firewall)
• 2006 Saab 9-7X (LH engine, 6 cylinder, IDs 12569773 or 12597521)

Verify part numbers; provide your VIN for confirmation and programming before shipment. This ensures it matches your Trailblazer’s configuration, avoiding mismatches.

Don’t let a failing PCM sideline your adventures. Order now, send us your VIN, and experience the difference in reliability. With my background, I can assure you—this is the fix that sticks. Act today to restore that smooth, powerful drive you expect from your 2006 Trailblazer.