2006 HUMMER H3 Powertrain Control Module (PCM) 12569773 – Programmed to Your VIN

Imagine you’re off-roading your 2006 HUMMER H3 through rugged terrain, and suddenly the engine hesitates, throwing a check engine light that kills your momentum. As a seasoned mechanic who’s diagnosed countless H3 powertrain glitches, I’ve seen how a faulty PCM can turn a reliable beast into a headache. This pre-programmed PCM, part number 12569773, arrives ready for your vehicle with the latest GM software updates, matched precisely via your VIN. It’s the straightforward solution to restore smooth performance and clear those nagging error codes.

Key Features & Benefits

This PCM isn’t just a replacement—it’s optimized with fresh GM flashes to enhance engine efficiency and drivability. You’ll notice improved throttle response during climbs or highway merges, better fuel management for those long hauls, and enhanced emission controls to pass inspections effortlessly.

• VIN-Specific Programming: We use your VIN to ensure perfect compatibility, eliminating guesswork and reducing installation time.
• Latest GM Updates: Addresses known software flaws that cause erratic shifting or idle issues in 2006 HUMMER H3 models.
• Broad Compatibility: Replaces multiple part numbers like 12588650, 12589311, and up to 19209821, making it versatile for various GM vehicles.
• Reliability Boost: Helps prevent breakdowns, especially when towing trailers or navigating wet conditions where electrical gremlins often strike.

In my experience, owners report a noticeable difference in power delivery after swapping to this unit—think crisper acceleration without the lag that plagues aging modules.

Common Issues & How This Fixes Them

Dealing with a stumbling engine in your HUMMER H3? Common symptoms include rough idling at stoplights, unexpected stalling during low-speed maneuvers, or a persistent check engine light with codes like P0606 (PCM processor fault) or P0171 (system too lean). These often stem from internal PCM failures due to heat exposure on the right-hand firewall or moisture ingress in off-road environments.

I’ve helped H3 drivers who faced no-start conditions after a muddy trail run, tracing it back to corrupted PCM data. This replacement fixes that by providing a fresh, updated module that recalibrates fuel injectors and ignition timing. For instance, if you’re seeing DTC P0300 for random misfires, the new programming stabilizes combustion, restoring torque for those steep inclines.

Another frequent headache: poor transmission shifting in automatic models, linked to outdated software. This PCM resolves it with GM’s refined algorithms, ensuring seamless gear changes. Pro tip: Before replacement, scan for codes using an OBD-II tool—it’s a quick way to confirm the PCM is the culprit and avoid unnecessary repairs.

Easy Installation Guide

Swapping this PCM is doable for most DIYers with basic tools. Locate it on the right-hand firewall in your 2006 HUMMER H3. Disconnect the battery first to prevent shorts, then unplug the harnesses and remove mounting bolts. Install the new unit, reconnect everything, and clear any stored codes with a scanner.

1. Provide your VIN post-purchase for us to program and ship.
2. Expect 30-45 minutes for the swap; no special tools needed beyond a socket set.
3. After install, drive a few cycles to let the system adapt—monitor for cleared DTCs.
4. Tip: Apply dielectric grease to connectors to ward off future corrosion, especially if you frequent damp trails.

If you’re not comfortable, a local shop can handle it affordably, often in under an hour.

Fitment Details

This PCM fits perfectly in your 2006 HUMMER H3, mounted on the right-hand firewall. It’s also compatible with similar GM platforms sharing the 4.2L engine architecture.

Compatible with:

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

Verify part numbers and provide your VIN for confirmation to ensure a flawless match. Don’t let a failing PCM sideline your adventures—order now and get back to conquering the trails with confidence. Your HUMMER H3 deserves peak performance; act today!