Restore Your Isuzu Hombre’s Performance and Reliability
Is your 1998-2000 Isuzu Hombre running rough, stalling unexpectedly, or showing a persistent check engine light? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your truck. A faulty PCM can wreak havoc on everything from fuel economy to transmission shifting, making your vehicle unreliable. This isn’t just an inconvenience; it can be a serious safety issue. As a technician with over two decades of experience, I’ve seen firsthand how a failing module can mimic a dozen other problems, leading to wasted time and money on incorrect diagnoses.
This replacement PCM is the definitive solution. It’s not just a part; it’s a complete service. We flash the module with the latest official GM software updates and program it specifically to your truck’s Vehicle Identification Number (VIN) before it ever leaves our facility. This means it arrives at your door ready for a straightforward, plug-and-play installation, restoring the precise performance your vehicle had when it was new.
Case Study: A Tricky Diagnosis
I remember a 1999 GMC Jimmy (which shares the same 4.3L platform and PCM as the Hombre) that came into my shop with a frustrating, intermittent no-start condition. The owner had already replaced the battery, alternator, and fuel pump. We scanned it and found no hard codes, just a history of random communication errors. After checking all the grounds and power feeds to the PCM, we decided to swap in a known-good, programmed module. The problem vanished instantly. The old PCM’s internal processor was failing under certain temperature conditions, a common issue with these units. This pre-programmed module saves you that diagnostic headache.
Is Your Truck Showing These Signs of PCM Failure?
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Engine stalling, stumbling, or hesitating
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A sudden drop in fuel mileage (MPG)
- ✔ The engine cranks but refuses to start
- ✔ Failing a state emissions inspection
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0604, or P0606 pointing to internal module failure
Your Straightforward Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the PCM: On the Isuzu Hombre and its GM siblings (S10/Sonoma), the PCM is typically located in the engine bay on the right-hand (passenger) side, near the firewall or inner fender.
- ✔ Disconnect and Remove: Carefully unplug the electrical harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Bolt your new, pre-programmed PCM into place. Firmly reconnect the electrical harnesses, making sure they click securely into position.
- ✔ Reconnect Power: Reattach the negative battery terminal and tighten it.
- ✔ Final Steps: In many cases, a security relearn procedure is required. A common method is to turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeat this cycle three times. This allows the vehicle’s security system to recognize the new PCM. Then, start the engine and let it idle to complete the process.
Guaranteed Vehicle Compatibility
This module, part number 16263494, is a direct replacement for a wide range of GM trucks and vans. It is also compatible with part numbers 16265035, 8162634940, 218-11787, and 21811787. Please verify your vehicle is on the list below. Providing your VIN at checkout is essential for us to ensure perfect programming and compatibility.
Hombre (98-00, 4.3L V6)
Chevrolet / GMC:
S10/S15/Sonoma (98-00, 4.3L)
Blazer/Jimmy (98-00)
C/K 1500/2500/3500 Pickups (99-00, Gas)
Silverado/Sierra 1500 (99-00, V6)
Suburban 1500/2500 (99, Gas)
Tahoe/Yukon (99-00)
Astro / Safari Van (99-01)
Express / Savana Van 1500/2500/3500 (99-02, Gas)
Cadillac / Oldsmobile / GMC:
Escalade (99-00)
Bravada (98-00)
Envoy (98-00)
Note: Some 1998 models require build date option ZN4. Please check your service parts sticker or contact us with your VIN.
Frequently Asked Questions
Do I need to do any programming after I receive it?
No. We handle all the programming using your VIN before shipment. The only additional step you might need is a simple security relearn procedure, which does not require any special tools.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to load the exact, correct software for your truck’s specific engine, transmission, and options. This ensures seamless communication between all vehicle systems and avoids compatibility issues.
Where is the PCM located on my 1999 Isuzu Hombre?
On the 1998-2000 Isuzu Hombre with the 4.3L engine, the Powertrain Control Module is found in the engine compartment, mounted on the passenger side inner fender.
Is this a reliable, long-term fix?
Absolutely. We address common failure points in these modules and load them with the latest stable software from GM, providing a dependable solution to get you back on the road with confidence.
What if I order the wrong part?
By providing your VIN at checkout, we verify fitment before we program and ship the module. This process helps guarantee you receive the correct part the first time.