Restore Peak Performance to Your Truck or Van
Is your Isuzu Hombre, Chevy S10, GMC Sonoma, or another compatible GM vehicle suffering from perplexing issues like a persistent check engine light, erratic engine behavior, stalling, or poor fuel economy? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit. This vital component manages everything from fuel injection and spark timing to transmission shifting and emissions control. When it fails, the symptoms can be frustrating and difficult to diagnose. This replacement module is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We once had a 1999 Chevy Blazer come in that had its owner completely stumped. It would start and run fine, but after about 15 minutes of driving, the transmission would start shifting harshly and erratically. The owner had already replaced the transmission fluid and solenoids with no luck. We hooked up our professional scan tool and watched the data stream from the PCM. We noticed the PCM was receiving correct data from the vehicle speed sensor but was sending out incorrect commands to the transmission. There were no specific transmission codes, just a general loss of communication code that would pop up intermittently. We swapped in a correctly programmed PCM, and the Blazer drove like it just rolled off the assembly line. It’s a classic example of how a failing computer can manifest as a mechanical problem.
Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with communication-related trouble codes (e.g., U-codes).
- ✔ Engine stumbling, stalling, or misfiring, especially when warm.
- ✔ Unexplained drop in fuel efficiency.
- ✔ Harsh or failed transmission shifts.
- ✔ Vehicle refuses to start, even with a good battery and starter.
- ✔ Intermittent failure of electronic components.
The Simple, VIN-Programmed Solution
Don’t waste time and money at a dealership. We make this repair straightforward. When you purchase this module, we use the Vehicle Identification Number (VIN) you provide to program it with the latest, most up-to-date software direct from GM. This ensures that the module is a perfect match for your vehicle’s specific configuration, including engine, transmission, and emissions equipment. This critical step means your new 1998-2000 Isuzu Hombre PCM arrives ready for a direct, plug-and-play installation. This process eliminates the need for expensive dealer-only tools and programming procedures, getting you back on the road faster.
This module is a direct replacement for multiple part numbers, including 16263494 and 16265035, and fits a wide range of popular GM trucks and vans from the era, such as the Chevrolet Express, GMC Savana, Chevy Blazer, GMC Jimmy, and many more. Please verify your part number and consult the detailed fitment list to ensure perfect compatibility.
Frequently Asked Questions
How do I provide my vehicle’s VIN?
After placing your order, simply reply to the confirmation email with your vehicle’s 17-digit VIN. We must have your VIN to program the module before it can be shipped.
Is any additional programming required after installation?
Our VIN programming handles the engine and transmission software. However, some GM vehicles of this era may require a security relearn or a Crankshaft Variation (CASE) relearn procedure after installation. This procedure syncs the module to your vehicle’s anti-theft system and crankshaft position sensor. Instructions are widely available online and can often be completed without special tools.
Is this a brand new part?
This is a high-quality, fully tested, and guaranteed functional component. Every module undergoes rigorous inspection and testing before being programmed with fresh, vehicle-specific software to ensure lasting performance and reliability.
Will this fix my vehicle’s problem for certain?
This part will resolve any issue directly caused by a faulty PCM. However, it’s crucial to ensure your vehicle has been properly diagnosed. Symptoms of a bad PCM can sometimes mimic other issues, such as a bad fuel pump or faulty sensors. We recommend a thorough diagnosis to confirm the PCM is the point of failure before ordering.
How can I be sure this fits my vehicle?
This module is compatible with a wide range of GM trucks and vans. Please check that your original module’s part number is listed (e.g., 16263494, 16265035, 8162634940). You can also use the detailed fitment list on this page to match your exact year, make, and model. If you are still unsure, contact us for assistance.