Restore Peak Performance to Your GM Vehicle
Is your 1998 GMC Savana 1500 van running rough, shifting erratically, or failing to start? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. This vital component manages everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it falters, the entire vehicle’s performance suffers. This replacement PCM, part number 16250279, is the definitive solution to get your truck or van back on the road with reliability and confidence.
The Brain of Your Operation: Understanding the PCM
The PCM in your GM vehicle is a sophisticated computer that constantly analyzes data from dozens of sensors throughout the engine and transmission. It takes in information about engine speed, throttle position, oxygen levels, and vehicle speed, then makes instantaneous calculations to ensure optimal performance, fuel economy, and low emissions. Over time, heat, vibration, and electrical fluctuations can degrade the internal components of the module, leading to a host of frustrating and often difficult-to-diagnose problems. Simply put, a healthy PCM is critical for a healthy vehicle.
From the Diagnostic Bay
We once had a 1999 GMC Sierra 1500 in the shop with a bizarre issue. The owner complained of random stalling at stoplights and a transmission that would occasionally refuse to shift out of first gear. He had already replaced the fuel pump and the throttle position sensor with no luck. After hooking up our scanner, we noticed erratic data streams from multiple sensors, but the sensors themselves tested fine. This pointed us directly to the central processing unit – the PCM. The original module was sending corrupt signals, causing the other components to behave incorrectly. Installing a correctly programmed 1998 Savana 1500 PCM (which shares the same architecture) solved all the issues instantly. It’s a powerful reminder that when multiple, unrelated systems act up, the problem often lies with the computer that controls them all.
Common Symptoms of a Faulty PCM
If you’re experiencing any of the following issues, a failing PCM could be the culprit. A faulty module can mimic other problems, so it’s important to recognize the signs that point to the vehicle’s central computer.
- ✔ Check Engine Light is illuminated with various, often inconsistent, trouble codes.
- ✔ Engine stalling, misfiring, or running rough.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ A complete no-start condition where the engine cranks but won’t fire up.
- ✔ Noticeable decrease in fuel economy.
- ✔ Failure to pass state emissions tests.
- ✔ Communication errors with diagnostic scan tools.
Your Plug-and-Play Solution
Don’t settle for a generic, unprogrammed module that will require expensive trips to the dealership for flashing. We take the guesswork and hassle out of the process. When you order from us, we will flash the module with the latest GM-certified software updates specifically for your vehicle. All we need is your Vehicle Identification Number (VIN) at the time of purchase. This ensures that the PCM is perfectly matched to your vehicle’s engine, transmission, and factory options, making installation as simple as possible. In most cases, after installation, you will only need to perform a simple security relearn procedure, which can be done without any special tools.
Guaranteed Compatibility
This module is a direct replacement for several original equipment part numbers, including 16250279, 09366810, and 09355699. It is designed to fit a wide range of late-90s GM trucks, vans, and SUVs. Please verify your part number and check the extensive fitment list below to ensure this is the correct part for your vehicle. This unit fits models such as the Cadillac Escalade, Chevrolet/GMC Pickups (1500, 2500, 3500), Suburban, Tahoe, Yukon, Astro, Safari, S10/Blazer, and more from 1998-1999. Restoring your vehicle’s core electronic system is a critical repair, and this pre-programmed module is the most reliable and efficient way to do it.
Frequently Asked Questions
Do I need to send my old PCM back?
No core charge is required for this part. You can keep your old module, though we always recommend recycling old electronics responsibly.
What is the VIN and why do you need it?
The VIN is your vehicle’s unique 17-digit identification number, usually found on the driver’s side dashboard or door jamb. We use it to load the exact factory software and calibrations for your specific engine, transmission, and options, ensuring a perfect match.
Is this module difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the module. After installation, you will likely need to perform a security relearn procedure (often called a Passlock or VATS relearn), which involves a series of key cycles. Instructions for this procedure are widely available online for your specific model.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty PCM, then yes, this replacement module will resolve the issue. However, it’s always best to have your vehicle properly diagnosed to rule out other potential problems like failed sensors or wiring issues.
What if my part number is slightly different?
This module is a direct replacement for part numbers 16250279, 09366810, and 09355699. If your original module has one of these numbers, this part is compatible. Please check our detailed fitment list or contact us if you are unsure.