2006 Isuzu Ascender Powertrain Control Module 19209821 Programmed to VIN

Is Your 2006 Isuzu Ascender Experiencing Baffling Electrical Problems?

If your 2006 Isuzu Ascender is acting up with no clear cause, you’re not alone. Over my 20+ years of hands-on diagnostics, I’ve seen countless vehicles from this platform—the Ascender, Trailblazer, Envoy, and others—come into the shop with issues that seem almost random. The engine might stall for no reason, the transmission could shift harshly, or the check engine light might be on with communication codes that stump even experienced mechanics. More often than not, the root cause is a failing Powertrain Control Module (PCM).

The PCM is the brain of your vehicle, managing everything from fuel injection and spark timing to transmission shift points. On your Ascender with the 4.2L engine, it’s located on the driver’s side of the engine block, where it’s subjected to intense heat and vibration. After years of service, the delicate internal components can fail, leading to a host of frustrating symptoms.

Common Signs of a Failing Ascender PCM

A failing PCM doesn’t always die suddenly. It often starts with intermittent problems that can be difficult to diagnose. Here’s what I typically see in the service bay:

• ✔ The Check Engine Light is illuminated, often with U-series (communication) trouble codes.
• ✔ Your automatic transmission shifts erratically, slams into gear, or feels like it’s slipping.
• ✔ The engine hesitates, stumbles, stalls, or won’t start at all, even with a good battery and starter.
• ✔ A noticeable drop in fuel mileage for no apparent reason.
• ✔ Other warning lights, like ABS or security, may come on unexpectedly.
• ✔ The vehicle fails to pass an emissions test.

The Direct Solution: A VIN-Programmed Module

This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a quality PCM and professionally program it with the latest, most stable GM software updates specific to your Ascender’s VIN. This critical pre-programming step means you can avoid a costly trip to the dealership and the need for specialized scan tools for programming. When it arrives, it’s ready to be installed.

Our Simple Process:

• ✔ Provide Your VIN: After you place your order, simply send us your vehicle’s 17-digit VIN.
• ✔ We Program It: Our technicians will flash the module to match your vehicle’s exact factory specifications.
• ✔ Install and Drive: Once you receive the module, you or your mechanic can install it. In most cases, the vehicle will start and run correctly immediately. A security or crankshaft position (CASE) relearn procedure may be required with a capable scan tool, a common step for any PCM replacement.

Guaranteed Compatibility

This module is a direct replacement for a wide range of part numbers, ensuring a perfect fit and function for your vehicle. It is compatible with 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

This part will fit these makes and models with these options:

• ✔ ISUZU ASCENDER 2006: Electronic Control Module; 4.2L (LH engine)
• ✔ BUICK RAINIER 2006: Electronic Control Module; (LH engine), 4.2L
• ✔ CHEVROLET COLORADO 2004-2006: Electronic Control Module; (RH firewall)
• ✔ CHEVROLET TRAILBLAZER 2006: Electronic Control Module; (LH engine), 4.2L
• ✔ CHEVROLET TRAILBLAZER EXT 2006: Electronic Control Module; (LH engine), 4.2L
• ✔ GMC CANYON 2004-2006: Electronic Control Module; (RH firewall)
• ✔ GMC ENVOY 2006: Electronic Control Module; 4.2L (LH engine)
• ✔ GMC ENVOY XL 2006: Electronic Control Module; (LH engine), 4.2L
• ✔ HUMMER H3 2006: Electronic Control Module; (RH firewall)
• ✔ 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, ID 12569773 or 12597521