Is Your GM Truck or Van Acting Up?
If you’re dealing with a frustrating no-start, a rough idle that shakes the whole vehicle, erratic shifting, or a check engine light that just won’t go away, the problem is often the brain of your engine: the Powertrain Control Module (PCM). After 20+ years of service, the original PCM in your 1998-1999 GM vehicle has endured countless heat cycles, and internal components can begin to fail. This leads to the baffling performance issues that can leave you stranded.
A Real-World Diagnosis
“A customer’s ’99 Tahoe came in last week with a no-start condition after a hot day. The fuel pump was fine, spark was good, but the injector pulse was erratic. After checking all the wiring, we traced it back to a heat-soaked PCM. These older units are notorious for solder joint failures after decades of engine bay heat. A reliable, pre-programmed replacement like this one had him back on the road the same afternoon without a trip to the dealer.”
The Direct-Fit, Programmed Solution
Forget the hassle and expense of a dealership visit. This is a dependable, used OEM Powertrain Control Module that we program specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and we’ll flash the module with the latest GM software updates tailored to your exact make, model, and engine. It arrives at your door ready for a straightforward installation.
Key Benefits of This VIN-Programmed PCM:
- โ Plug & Play Ready: We handle all the programming. No special tools or dealer appointments are required.
- โ VIN-Matched Software: Flashed with the newest GM updates for your specific vehicle, ensuring optimal performance and compatibility.
- โ Solves Common Issues: A direct solution for symptoms like random stalling, poor fuel economy, harsh transmission shifts, and various engine error codes.
- โ Cost-Effective Repair: Get a reliable, tested OEM part for a fraction of the cost of a new module from a dealership.
- โ Guaranteed Compatibility: This module is a direct replacement for multiple part numbers, including 09355699, 16266645, 16258815, and more.
Easy Installation for Your 1998-1999 Express 1500 PCM
You can get your truck or van running right again in your own driveway. Follow these simple steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most GM trucks and vans from this era, the PCM is located in the engine compartment, typically on the driver’s side fender or near the battery.
- Disconnect Harnesses: Carefully unclip and remove the electrical wiring harnesses from the old module. The clips can be brittle, so be gentle.
- Remove Old Module: Unbolt the mounting bracket and remove the faulty PCM from the vehicle.
- Install Replacement: Mount the new, programmed PCM in the same location.
- Reconnect Everything: Securely plug the wiring harnesses back into the new module until they click, then reconnect the negative battery terminal.
- Final Step: In some cases, a security relearn procedure may be necessary. This can typically be done by turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine.
Will This Fit My Vehicle?
This Electronic Control Module, identified by hardware ID 9355699, is compatible with a wide range of GM vehicles. It is a direct replacement for part numbers 16250279, 09355699, 16266645, 16258815, 09366810, and 9366810. Please verify your part number or consult the list below to ensure proper fitment for your Chevrolet, GMC, Oldsmobile, or Isuzu truck, van, or SUV.
Extensive Fitment List:
This module fits dozens of models including, but not limited to:
- Chevrolet Express / GMC Savana Vans (1500, 2500, 3500)
- Chevrolet & GMC Pickups (1500, 2500, 3500)
- Chevrolet Tahoe / GMC Yukon
- Chevrolet Suburban
- Cadillac Escalade (1999)
- Chevrolet Astro / GMC Safari
- Chevrolet S10 / GMC Sonoma
- Chevrolet Blazer / GMC Jimmy
- Oldsmobile Bravada
- Isuzu Hombre
Note: This is a quality used part sourced from a salvaged vehicle, inspected for integrity, and then professionally programmed to ensure reliability.