Restore Your Vehicle’s Brainpower and Performance
Is your GMC Envoy, Chevy Blazer, S10, or other GM truck suffering from perplexing issues like stalling, erratic shifting, poor fuel economy, or a persistent check engine light? The problem often lies with a failing Powertrain Control Module (PCM), the central computer that manages your engine and transmission. This replacement PCM is the definitive solution to restore your vehicle’s factory performance, reliability, and drivability. It arrives pre-programmed with the latest GM software updates, tailored specifically to your vehicle’s VIN, making installation straightforward and eliminating the need for a costly trip to the dealership.
From the Diagnostic Bay
We once had a 1999 Chevy Silverado in the shop that was driving its owner crazy. It had a random misfire and would occasionally stall at stoplights. The owner had already replaced the spark plugs, wires, and even the fuel filter to no avail. After hooking up our scanner, we noticed the fuel trim data was completely erratic. Instead of chasing more sensors, we checked the PCM’s ground connections and power feeds, which were solid. The culprit was an internal failure in the original module’s driver circuit. Installing a properly programmed PCM like this one solved all the issues instantly. It’s a classic case where treating the root cause—the computer—is the only way to fix the symptoms.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is on with various trouble codes (DTCs).
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or inconsistent idling.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Vehicle fails to start, even with a good battery and starter.
- ✔ Failure to pass emissions testing.
Why Our Programmed 1998-2000 Envoy Powertrain Control Module is the Best Solution
Your vehicle’s PCM is not a one-size-fits-all part. It requires precise software that matches your vehicle’s specific engine, transmission, and emissions equipment. Our service takes the guesswork out of the repair. When you provide your Vehicle Identification Number (VIN) during checkout, our technicians flash this module with the correct, updated software directly from GM. This ensures that all parameters for fuel delivery, spark timing, and transmission control are set perfectly for your exact vehicle. This is a true plug-and-play solution designed to get you back on the road with confidence.
This module is a direct replacement for a wide range of popular GM trucks, vans, and SUVs from the late 90s and early 2000s, including the Chevy Express, GMC Savana, Cadillac Escalade, and Isuzu Hombre. Please verify your original part number against our compatible list (16263494, 16265035, 8162634940) and use the fitment chart to confirm compatibility.
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN when you place your order, and the module will arrive ready for installation.
What is a VIN and why do you need it?
The VIN is your vehicle’s unique 17-digit identification number. It contains critical information about the engine, transmission, and options your vehicle was built with. We use the VIN to load the exact factory software your vehicle requires for optimal performance.
Is installation difficult?
Installation is generally straightforward for someone with basic mechanical skills. It typically involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in reverse order. However, some vehicles may require a security relearn procedure (CASE relearn), which can be done with a capable scan tool or by following a specific drive cycle.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. It’s crucial to properly diagnose the vehicle first to ensure the PCM is the actual point of failure and not a bad sensor or wiring issue.
How do I know if this part number is correct for my vehicle?
The best way is to check the part number on your original module. This PCM replaces several part numbers, including 16263494 and 16265035. You can also use the detailed fitment list on this page to confirm compatibility with your make, model, and year.