Is Your 1998-1999 Chevy Truck or Van Acting Up?
If you’re dealing with frustrating issues like a no-start condition, erratic engine behavior, or a check engine light that won’t go away, a failing Powertrain Control Module (PCM) is often the culprit. For workhorse vehicles like the 1998-1999 Chevrolet 2500, the PCM is the central command center. When it fails, your truck simply can’t run correctly. I’ve seen it hundreds of times in my shop: a perfectly good engine crippled by a faulty computer.
Just last week, a customer’s ’99 Suburban 2500 was brought in on a flatbed. It would start cold but die as soon as it reached operating temperature, refusing to restart. After confirming fuel and spark were good, we diagnosed a heat-soaked PCM that was failing internally. A replacement like this one, programmed to his VIN, solved the problem completely and had him back on the road without the high cost and wait time of a dealership.
Get a Direct Solution, Not a Headache
This isn’t just a used part; it’s a complete, ready-to-install solution. This is a tested, reliable PCM sourced from a salvaged vehicle, which we then professionally program to your vehicle’s exact specifications. Simply provide us with your VIN after purchase, and we’ll flash the module with the latest official GM software updates. This ensures all engine and transmission parameters are set perfectly for your truck.
Common Symptoms of a Failing GM PCM:
- โ Engine cranks but will not start
- โ Stalling, especially when the engine is warm
- โ Poor or erratic automatic transmission shifting
- โ A persistent Check Engine Light with communication error codes
- โ Noticeable drop in fuel economy
- โ Rough or unstable idle
Solving Issues with Your 1998-1999 Chevrolet 2500 PCM
Replacing the PCM on these GMT400 platform trucks is a straightforward job that you can do in your own driveway. Our VIN programming service makes this a true plug-and-play repair, saving you from a tow to the dealer and expensive diagnostic and programming fees. This module is a direct replacement for several part numbers, including 16266645 and 09355699, ensuring wide compatibility.
Expert Pro Tip from a 20-Year Technician
Before you install your new PCM, take 10 minutes to clean the main engine and chassis ground connections. On these ’90s GM trucks, there’s typically a ground strap from the firewall to the back of the cylinder head and a main cable from the battery to the engine block. Corrosion at these points creates electrical resistance, which can cause bizarre symptoms that mimic PCM failure. A quick cleaning with a wire brush can prevent future issues and ensure your new module functions perfectly.
Simple, No-Hassle Installation
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most 1998-1999 Chevy/GMC trucks and SUVs, the PCM is located in the engine compartment on the driver’s side, near the fender or firewall.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. There are typically two or three large connectors with locking tabs.
- Swap the Modules: Unbolt the old PCM from its mounting bracket and install the new one in its place.
- Reconnect Everything: Securely plug the wiring harnesses into your new PCM and reconnect the negative battery terminal.
- Start Your Engine: Your vehicle is now ready to run with the correctly programmed module.
Guaranteed Compatibility
This Electronic Control Module is a direct fit for a wide range of GM vehicles. Please verify your part number or match your vehicle in the fitment list below. This unit is compatible with service numbers: 09355699, 16266645, 16250279, 16258815, 09366810, 9366810.