Is Your Chevy Express Van Running Rough?
If your 1998 or 1999 Chevrolet Express 1500 Van is experiencing perplexing issues like a persistent check engine light, erratic shifting, stalling, or a complete no-start condition, the root cause is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM manages everything from fuel injection and ignition timing to transmission shift points and emissions control. When it begins to fail, it can create a cascade of problems that are often misdiagnosed, leading to costly and unnecessary repairs of other components.
From the Diagnostic Bay
We once had a 1999 Savana van (which uses the same platform) come into the shop with a complaint of intermittent stalling and a harsh 1-2 shift. The owner had already replaced the throttle position sensor and the mass airflow sensor, spending hundreds of dollars with no improvement. After connecting our scanner, we noticed erratic data coming from the PCM. Instead of throwing more parts at it, we swapped in a known-good, programmed PCM. The van immediately ran perfectly. It’s a classic case where addressing the ‘brain’ of the operation was the true fix, saving the customer further frustration and expense.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine misfires, stumbling, or rough idling.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Failure to pass state emissions testing.
The Direct-Fit, Programmed Solution for Your Van
Don’t let a faulty computer keep your reliable workhorse off the road. This is a genuine, used OEM Powertrain Control Module that has been thoroughly tested and is ready for service. The critical advantage of our service is that we program the module specifically for your vehicle using your VIN. This ensures that all factory settings, engine parameters, and anti-theft system information are correct right out of the box. We flash it with the latest GM-approved software updates, which can often resolve inherent factory bugs and improve overall performance and reliability.
Guaranteed Compatibility for Your 1998-1999 Express 1500 PCM
This module, identified by part number 16258815, is a direct replacement for a wide range of GM trucks and vans from this era. It is fully compatible with several other service numbers, including 09355699, 16266645, 9355699, 16250279, 09366810, and 9366810. Whether you have a Chevrolet Express, GMC Savana, Tahoe, Suburban, or a C/K Pickup, as long as your vehicle is listed in the compatibility chart, this module is the correct fit. The key is the VIN programming, which makes this specific module the precise brain for your vehicle’s unique configuration.
Simple Process to Get You Back on the Road
- ✔ Place Your Order: Add this item to your cart and complete the checkout process.
- ✔ Provide Your VIN: Reply to your order confirmation email with your vehicle’s 17-digit Vehicle Identification Number (VIN). This is crucial for the programming service.
- ✔ Install the Module: Simply disconnect the battery, remove the old PCM, and install the new one. In most cases, a security relearn procedure (often called a CASE relearn) may be required, which can be done with a capable scan tool or by following a simple key-cycle procedure.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of the engine and transmission to ensure optimal performance, fuel efficiency, and emissions.
Is this part ready to install when it arrives?
Yes! We program the computer using your VIN before we ship it. This ensures it’s matched to your vehicle’s specific options and systems. In some cases, a simple security relearn procedure is needed after installation.
How do I provide my VIN?
After you place your order, simply reply to the confirmation email with your 17-digit VIN. You can find it on your vehicle’s dashboard (driver’s side), on your registration, or on the driver’s side door jamb sticker.
My original part number is slightly different, will this still work?
Yes, this module replaces multiple part numbers, including 09355699, 16266645, and others listed in the description. As long as your vehicle model and year are listed, our VIN programming ensures it will function correctly.
Is this a new part?
This is a high-quality, tested, and fully functional used OEM part sourced from a salvaged vehicle. This provides the reliability of a genuine GM part at a significant cost saving.