End the Frustration of a Failing Engine Computer
Is your truck or SUV suffering from erratic behavior, a persistent check engine light, or a no-start condition? A failing Powertrain Control Module (PCM) is often the culprit, leaving you stranded and stressed. This isn’t just an inconvenience; it’s a compromise on your vehicle’s reliability and your peace of mind. It’s time to restore the dependable performance you count on. This module is a direct-fit, VIN-programmed solution for your vehicle, designed to bring back smooth operation and confidence to your drive.
Warning Signs and How to Overcome Them
A faulty PCM can manifest in numerous ways. By replacing it with this precisely programmed unit, you can resolve these common issues and enjoy significant benefits:
- ✔ Eliminate Stalling & Hesitation: Regain smooth acceleration and a steady idle by restoring proper fuel and timing control.
- ✔ Solve Transmission Problems: Fix harsh or delayed shifting by ensuring the PCM communicates correctly with your transmission.
- ✔ Clear Persistent DTCs: This module can resolve codes like P0601 (Internal Control Module Memory Check Sum Error) or other communication-related faults.
- ✔ Pass Emissions Testing: A properly functioning PCM is critical for managing your vehicle’s emissions systems and passing state inspections.
- ✔ Restore Full Power: Get back the horsepower and torque your engine was designed to deliver.
- ✔ Plug-and-Play Installation: Because we program it to your VIN, it’s ready to install right out of the box, with no trip to the dealer required.
Guided Installation to Restore Your Ride’s Reliability
Installing your new 1998 Envoy PCM is a straightforward process that most DIYers can complete with basic hand tools. Follow these steps for a confident fix.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Old Module: On most of these GM vehicles, the PCM is found in the engine bay, often on the driver’s or passenger’s side fender well or firewall.
- Disconnect Wiring Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight off the module. Inspect the pins for any corrosion or damage.
- Remove the Old PCM: Unbolt the module from its mounting bracket. It’s typically held in place by a few small bolts or nuts.
- Install the New PCM: Mount your new, pre-programmed module in the same location. Ensure it is secure.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new PCM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn (If Necessary): While we program the module to your VIN, some vehicles may require a simple key-cycle security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating a couple of times.
Tailored Fit for Your GM Vehicle
This module is a guaranteed fit for a wide range of trucks, vans, and SUVs. Please verify your original part number (16250279, 09366810, or 09355699) and check the list below to confirm compatibility with your specific model and year.
- Cadillac Escalade: 1999
- Chevrolet/GMC Pickups (1500, 2500, 3500): 1998-1999 (Gasoline engines)
- Chevrolet/GMC Vans (Express, Savana 1500, 2500, 3500): 1998 (Gasoline engines)
- Chevrolet/GMC S-Series (S10, S15, Sonoma, Blazer, Jimmy): 1998 (4.3L V6)
- Chevrolet Astro / GMC Safari: 1998-1999
- Chevrolet Tahoe / GMC Yukon: 1998-1999
- Chevrolet/GMC Suburban (1500, 2500): 1998-1999
- GMC Envoy: 1998
- Oldsmobile Bravada: 1998
- Isuzu Hombre: 1998 (4.3L V6)
Getting the right 1998 Envoy PCM is crucial. By providing your VIN, you ensure we deliver a module with the correct software for your vehicle’s specific options, restoring its original performance and reliability.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
In most cases, no. We program the module to your specific VIN, so it arrives ready for installation. Some GM vehicles may require a simple security relearn procedure, which involves cycling the ignition key and can be done in your driveway without any special tools.
How do I provide my VIN?
After you complete your purchase, you can send us your 17-digit Vehicle Identification Number (VIN) through the messaging system. We cannot ship your part until we receive this information, as the programming is essential for it to function in your vehicle.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM itself (like code P0601), then yes, this part will resolve the issue. However, if the light is on due to a faulty sensor or other component, you will still need to diagnose and repair that separate problem.
Is this a new or a used part?
This is a high-quality, inspected, and tested component sourced from a recycled vehicle. Each unit is thoroughly vetted for functionality before being programmed with the latest GM-certified software for your VIN, ensuring dependable performance.
What is the difference between a PCM, ECM, and ECU?
The terms are often used interchangeably. ECM (Engine Control Module) typically just controls the engine. A PCM (Powertrain Control Module) controls both the engine and the transmission. ECU (Electronic Control Unit) is a more generic term. For this generation of GM vehicles, PCM is the most accurate term.