Restore Peak Performance to Your Truck’s Engine
Is your Isuzu Hombre or GM truck plagued by a persistent check engine light, erratic idling, or frustrating stalling issues? These are classic signs of a failing Powertrain Control Module (PCM), the computer that serves as your vehicle’s brain. When it falters, everything from fuel delivery to transmission shifting can become unpredictable. This replacement PCM, part number 16263494, is the definitive solution to restore your truck’s original reliability and drivability.
Unlike generic modules that require expensive trips to the dealership for programming, we handle the critical software setup for you. Before we ship, we will flash this module with the latest official GM software updates, tailored specifically to your vehicle using your VIN. This ensures perfect communication between the engine, transmission, and other systems, resolving complex electronic issues right out of the box. Get your dependable 1998-2000 Isuzu Hombre PCM and get back on the road with confidence.
Case Study: A Tricky Diagnosis
A customer brought in a ’99 GMC Jimmy with the 4.3L V6 that had the most bizarre symptoms. It would randomly misfire on cylinder 3, but only after it was fully warmed up and sitting at a stoplight. We checked the plug, wire, cap, rotor, and even the injector—all were fine. No vacuum leaks. The scan tool showed a P0303, but nothing else. After hours of chasing mechanical ghosts, we decided to look at the PCM. On these older GM trucks, I’ve seen internal board components, specifically the injector drivers, weaken from heat cycles over 20+ years. We swapped in a VIN-programmed PCM, and the problem vanished instantly. The old module’s driver was failing under specific temperature loads, a headache that parts-swapping would never solve. This is why a quality, correctly programmed PCM is often the root fix for the most elusive electronic gremlins.
Common Signs of a Failing PCM
If you’re experiencing any of the following, a faulty module could be the culprit. This part is a direct fix for many common issues, including diagnostic trouble codes.
- ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Intermittent stalling or rough idling.
- ✔ Failure to pass an emissions inspection.
A Straightforward Guide to Installation
Replacing the PCM on these trucks is a job most DIYers can handle in their own driveway. Our VIN programming makes it a true plug-and-play process.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On the Isuzu Hombre, S10/Sonoma, and Blazer/Jimmy, the PCM is typically located in the engine bay on the right-hand (passenger) side. On vans and full-size trucks, it may be on the left side or near the battery.
- Disconnect the Harnesses: Carefully unclip and remove the electrical wiring harnesses connected to the old PCM. The connectors are color-coded for easy identification.
- Remove the Old Unit: Unbolt the mounting bracket holding the old module in place and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM, reconnect the color-coded harnesses, and ensure they click securely into place.
- Final Steps: Reconnect the negative battery terminal. The vehicle may need to complete a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Start the engine and enjoy your smooth-running truck!
Guaranteed Vehicle Compatibility
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787. It is confirmed to fit a wide range of GM and Isuzu vehicles. Please verify your model and options below. Providing your VIN at checkout is essential for us to deliver a perfectly matched 1998-2000 Isuzu Hombre PCM or compatible module for your specific truck or van.
- Blazer/Jimmy S15 (98-00)
- S10/S15/Sonoma (98-00, 4.3L)
- C/K 1500/2500/3500 Pickup (99-00)
- Silverado/Sierra 1500 (99-00, 6-cyl)
- Suburban 1500/2500 (99)
- Tahoe/Yukon (99-00)
- Astro / Safari (99-01)
- Express 1500/2500/3500 (99-02)
- Savana 1500/2500/3500 (99-02)
- Cadillac Escalade (99-00)
- Oldsmobile Bravada (98-00)
- GMC Envoy (98-00)
- Hombre (98-00, 4.3L)
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming myself?
No. This module arrives fully programmed to your vehicle’s VIN with the latest GM software. It is ready for installation right out of the box, saving you a costly trip to a mechanic or dealership.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part that has been professionally prepared and programmed for its next service life. It’s a reliable and cost-effective alternative to a new dealer part.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine functions and automatic transmission shift points. If your module is failing, it can cause poor shifting, and replacing it with this programmed unit can resolve those issues.
What if I have a different part number on my old module?
This unit is a direct replacement for several part numbers, including 16263494, 16265035, and 8162634940. As long as your vehicle is on our compatibility list, our VIN-based programming ensures this module will work correctly.