Restore Peak Performance to Your Truck or Van
Is your Isuzu Hombre, Chevy S10, GMC Jimmy, or another compatible GM vehicle suffering from erratic engine behavior, poor fuel economy, or a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle’s engine. A faulty PCM can disrupt everything from ignition timing and fuel delivery to transmission shifting, leading to a frustrating and unreliable driving experience. This replacement module is the definitive solution to restore your vehicle’s original performance and dependability.
From the Diagnostic Bay
We once had a 1999 GMC Jimmy come in with a no-start condition that had stumped two other shops. They had replaced the fuel pump and ignition coil, but the truck still wouldn’t fire. The owner was about to give up. When we hooked up our scanner, we noticed intermittent communication with the PCM. Instead of immediately condemning the module, we checked the main power and ground connections at the PCM connectors. Sure enough, the ground pin on the C1 connector had backed out slightly, causing a poor connection. After re-seating the pin and cleaning the contacts, the truck fired right up. It’s a powerful reminder: always verify the simple things like connections and grounds before replacing a major component like the PCM. A solid connection is just as important as a healthy module.
Symptoms of a Failing Powertrain Control Module
If your vehicle’s computer is failing, it can manifest in numerous ways. Pay close attention if you notice any of the following issues, as they may point directly to the PCM.
- ✔ Check Engine Light is illuminated, often with communication-related error codes (U-codes) or multiple random sensor codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ A complete no-start condition where the engine cranks but will not fire up.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass state emissions testing.
- ✔ Intermittent issues that seem to disappear and then return, often related to temperature changes.
The Perfect Solution for Your 1998-2000 Isuzu Hombre PCM
Don’t let a faulty computer keep your truck off the road. This module is a direct-fit replacement, engineered to meet or exceed original equipment specifications. The most significant benefit is our professional programming service. When you purchase this module, we will flash it with the latest GM-certified software specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures complete compatibility and proper function of all engine and transmission systems, eliminating the need for an expensive trip to the dealership for programming. It’s a true plug-and-play solution designed to get you back on the road quickly and confidently.
This module is a reliable replacement for multiple part numbers, including 16263494, 16265035, and 8162634940. It fits a wide range of popular GM trucks and vans from the late 90s and early 2000s. Please verify your vehicle in the comprehensive fitment list below to ensure a perfect match.
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle the programming for you before shipment. Simply provide us with your vehicle’s VIN during or after checkout, and the module will arrive ready for installation with the latest software updates.
Where is the PCM located on my vehicle?
On most compatible vehicles like the S10/Hombre/Blazer, the PCM is located in the engine compartment on the right-hand (passenger) side. On vans like the Express/Savana, it’s typically in the left-rear of the engine compartment. Always disconnect the battery before attempting removal or installation.
What is a VIN and why do you need it?
The VIN is your vehicle’s unique 17-digit identification number, like a fingerprint. We use it to load the exact software and calibrations your specific vehicle requires for proper engine, transmission, and emissions control.
Will this fix my Check Engine Light?
If the Check Engine Light is on due to an internal failure of the original PCM, then yes, this replacement module will resolve the issue. However, it’s crucial to ensure the root cause of the problem is the PCM and not a faulty sensor or wiring issue elsewhere in the vehicle.
Is any other procedure needed after installation?
In some cases, a Crankshaft Variation Relearn procedure (also known as CASE relearn) may be required using a capable scan tool. This helps the new PCM learn the precise position of the crankshaft, preventing potential misfire codes. Many vehicles will operate fine without it, but it is a recommended final step.