Restore Your GM Van or Truck’s Performance and Reliability
If you’re dealing with frustrating engine problems in your 1998 GMC Savana 2500 Van—like a persistent check engine light, rough idling, or a vehicle that just won’t start—a failing Powertrain Control Module (PCM) is often the culprit. As a technician with over two decades of experience under the hood, I’ve seen how a faulty PCM can create a cascade of issues that are maddening to diagnose. It’s the brain of your engine and transmission, and when it’s not working right, nothing else will.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a quality-tested PCM and program it specifically to your vehicle using your VIN. This means it arrives at your door with the latest GM software updates already loaded. You get improved performance and efficiency without the hassle or expense of a trip to the dealership for programming. This is the most direct and reliable way to get your workhorse back on the road and running smoothly.
A Technician’s Notebook: The Ghost in the Machine
I remember a 1999 Chevy Suburban that came into my shop with what the owner called “gremlins.” It would randomly stall at stoplights, the transmission would shift hard, and the fuel gauge would read empty right after a fill-up. They had already replaced the fuel pump and a few sensors with no luck. After connecting my scanner, I saw no communication with the PCM. A quick check of the powers and grounds to the module confirmed they were good. The PCM itself had failed internally. We installed a VIN-programmed module just like this one, performed the security relearn, and the truck ran perfectly. It’s a classic example of how a single component can cause a host of seemingly unrelated symptoms, and why a reliable, correctly programmed PCM is critical.
Is Your GM Truck or Van Showing These Signs?
A failing PCM can manifest in many ways. If your vehicle is experiencing any of the following, it might be time for a replacement:
- âś” Check Engine Light is on with codes related to internal module failure (e.g., P0601, P0605, P0606)
- âś” Vehicle will not start or is very difficult to start
- âś” Poor or erratic engine performance and stalling
- âś” Decreased fuel economy
- âś” Harsh or incorrect transmission shifting
- âś” Failure to pass an emissions inspection
- âś” Communication errors with diagnostic scan tools
A Straightforward Guide to Installation
Replacing the PCM in these GM vehicles is a job most DIYers can handle with basic tools. This pre-programmed module makes the process even simpler. Here’s a typical procedure:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these trucks and vans, the PCM is located in the engine bay, typically on the driver’s side inner fender or near the battery.
- Disconnect Connectors: Carefully unclip and remove the electrical wiring harnesses from the old PCM. These connectors have locking tabs that need to be released. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed PCM into the mounting bracket.
- Reconnect Everything: Firmly plug the wiring harnesses into the new PCM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: This is a crucial final step. Turn the key to the ‘ON’ position (without starting the engine) for 10-15 minutes. The ‘Security’ or ‘Theft’ light should turn off. Turn the key off for 10 seconds, then the vehicle should start and run normally. This syncs the new PCM with your vehicle’s anti-theft system.
Verified Vehicle Compatibility
This module is a direct-fit replacement for units with part numbers 16250279, 09366810, or 09355699. It is guaranteed to be compatible with the following models. Please match your vehicle and original part ID to ensure proper fitment.
- GMC Savana / Chevrolet Express Vans (1500, 2500, 3500) – 1998
- GMC Sierra / Chevrolet C/K Pickups (1500, 2500, 3500) – 1998-1999
- GMC Yukon / Chevrolet Tahoe – 1998-1999
- Chevrolet Suburban (1500, 2500) – 1998-1999
- Cadillac Escalade – 1999
- GMC Safari / Chevrolet Astro – 1998-1999
- GMC Jimmy / Chevrolet S10 Blazer / Oldsmobile Bravada – 1998
- GMC Sonoma / Chevrolet S10 Pickup – 1998
- GMC Envoy – 1998
- Isuzu Hombre – 1998
Note: Some models have specific options (e.g., engine size, build date). Providing your VIN ensures we send the correctly programmed module for your exact configuration.
Frequently Asked Questions About The 1998 Savana 2500 PCM
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before shipping. We use your VIN to load the latest GM-certified software for your specific vehicle. It arrives ready for installation.
What is the ‘security relearn’ and is it difficult?
The security relearn (or anti-theft relearn) is a simple procedure that syncs the new PCM to your vehicle’s keys. It requires no tools and typically involves leaving the key in the ‘ON’ position for about 10-15 minutes. We include easy-to-follow instructions.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both the engine and the transmission. If the module is faulty, it can cause poor shifting, hunting for gears, or getting stuck in one gear. A new, correctly programmed PCM often resolves these issues.
My original part number is 16250279. Will this part work?
Yes. This module is fully compatible with and replaces original part numbers 16250279, 09366810, and 09355699. We program it to function identically to the original unit in your vehicle.