Restore Your GM Van or Truck’s Performance and Reliability
Is your 1998 Chevy Express 2500 Van acting up? If you’re dealing with a persistent check engine light, rough idling, stalling, or poor fuel economy, the culprit is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, a faulty PCM can cause a host of frustrating and difficult-to-diagnose issues. This isn’t just a replacement part; it’s a direct solution to get your workhorse back on the road, running as it should. We take the guesswork and hassle out of the repair by programming this module specifically for your vehicle using your VIN. It arrives at your door with the latest GM factory software updates, ready for a straightforward installation.
Case Study: A Tricky Diagnosis
I once had a 1999 GMC Suburban in my bay that was driving the owner crazy. It would randomly stall at stoplights, but never threw a consistent code. We checked fuel pressure, sensors, and wiring—everything seemed fine. The owner had already replaced the fuel pump with no luck. On a hunch, I looked at the PCM’s live data and noticed erratic readings right before a stall. The original module had an internal logic failure that only appeared under specific conditions. We installed one of these VIN-programmed PCMs, and the problem vanished instantly. It’s a perfect example of how a software-correct module is often the key to fixing those stubborn, intermittent electrical gremlins.
Common Signs of a Failing PCM
If you’re experiencing any of the following, a faulty powertrain control module could be the cause. In my 20+ years of experience, these are the symptoms I see most often with these specific GM platforms.
- âś” Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- âś” The engine cranks but refuses to start.
- âś” Unexplained drops in fuel efficiency.
- âś” The transmission shifts erratically or harshly.
- âś” Intermittent stalling or a rough, unstable idle.
- âś” Failure to pass an emissions or smog test.
Your Straightforward Installation Guide
One of the best features of this module is that it arrives ready to install, with no need for a trip to the dealership for expensive programming. Here’s a general guide to get you started:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the PCM: On most of these GM trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side fender well or near the battery. It’s a silver metal box with several large electrical connectors.
- Disconnect the Old Module: Carefully unplug the wiring harness connectors. There are usually release tabs that need to be pressed or levers that need to be lifted. Never force them.
- Swap the Modules: Unbolt the old PCM from its mounting bracket. Secure the new module in its place.
- Reconnect Everything: Plug the wiring harnesses firmly into the new PCM. You should hear or feel a click as they lock into place.
- Final Step: Reconnect the negative battery terminal. Your vehicle is now ready to start. Some vehicles may require a security relearn procedure, which can typically be done without special tools.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 16250279, 09366810, and 09355699. Please verify your vehicle is on this list and that the ID number on your current module matches. Providing your VIN during checkout is essential for us to ensure perfect compatibility and programming.
ASTRO 98-99 (LH front by battery), ID 16250279
BLAZER S10/JIMMY S15 98 (RH front engine compartment), w/o build date opt ZN4; ID 16250279 or 16258815
BRAVADA 98 (6-262, 4.3L), w/o build date opt ZN4; ID 16250279 or 16258815
CHEVROLET 1500 PICKUP 98-99 Gasoline, (LH engine compartment), ID 16250279
CHEVROLET 2500 PICKUP 98-99 Gasoline, (LH front engine compartment), ID 16250279
CHEVROLET 3500 PICKUP 98-99 Gasoline, (LH front engine compartment), ID 16250279
ENVOY 98 (RH front engine compartment), w/o build date opt ZN4; ID 16250279 or 16258815
ESCALADE 99 (LH front engine compartment), ID 16250279
EXPRESS 1500 VAN 98 ID 16250279
EXPRESS 2500 VAN 98 Gasoline, ID 16250279
EXPRESS 3500 VAN 98 Gasoline, ID 16250279
GMC 1500 PICKUP 98-99 Gasoline, (LH engine compartment), ID 16250279
GMC 2500 PICKUP 98-99 Gasoline, (LH front engine compartment), ID 16250279
GMC 3500 PICKUP 98-99 Gasoline, (LH front engine compartment), ID 16250279
ISUZU HOMBRE 98 4.3L (6 cyl), w/o extended build date opt ZN4; ID 16258815
S10/S15/SONOMA 98 6-262 (4.3L), w/o build date opt ZN4; ID 16250279 or 16258815
SAFARI (GMC) 98-99 (LH front by battery), ID 16250279
SAVANA 1500 VAN 98 ID 16250279
SAVANA 2500 VAN 98 Gasoline, ID 16250279
SAVANA 3500 VAN 98 Gasoline, ID 16250279
SUBURBAN 1500 98-99 Gasoline, (LH front engine compartment), ID 16250279
SUBURBAN 2500 98-99 Gasoline, (LH front engine compartment), ID 16250279
TAHOE 98-99 Gasoline, (LH engine compartment), ID 16250279
YUKON 98-99 (LH engine compartment), ID 16250279
Frequently Asked Questions
Frequently Asked Questions
Do I need to have this module programmed by a dealer?
No! That’s the primary benefit of our service. We program the module with your vehicle’s specific VIN and the latest GM software before we ship it. It arrives ready for installation.
What information do you need from me?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). This is crucial for correct programming.
Where can I find my VIN?
Your VIN is typically located on a metal tag on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, and on your vehicle’s registration and insurance documents.
Is this a difficult part to replace for a DIYer?
For most individuals with basic hand tools and some mechanical comfort, this is a very manageable job. It typically involves disconnecting the battery, unplugging a few connectors, and swapping the module. No complex wiring is required.
What if my original part number is 16250279 or 09355699?
This module, part number 09366810, is a fully compatible and direct replacement for those part numbers. As long as your vehicle is on the fitment list, it will work correctly once programmed to your VIN.