Is Your GM Truck or Van Running Rough?
If your late-90s Chevrolet or GMC vehicle is experiencing frustrating issues like stalling, erratic shifting, a persistent check engine light, or a complete no-start condition, the problem might not be a simple sensor. The Powertrain Control Module (PCM), the electronic brain of your vehicle, could be the culprit. This vital component manages everything from fuel injection and ignition timing to transmission shifting. When it fails, it can cause a cascade of confusing and hard-to-diagnose problems. Don’t let a faulty computer keep your reliable truck or van off the road. We offer a direct-fit, VIN-programmed solution to get you running smoothly again.
From the Diagnostic Bay
We had a 1998 Chevy C1500 come into the shop that had its owner chasing his tail for weeks. The truck would randomly stall at stoplights and had a rough idle. The owner had already replaced the throttle position sensor, the idle air control valve, and even the fuel pump based on various forum suggestions. The check engine light was intermittent. After hooking up our professional scan tool, we noticed erratic data streams coming from the PCM and a few communication error codes that weren’t showing up on a basic code reader. We swapped in a known-good, programmed PCM, and the truck immediately ran like new. It was a classic case of a failing computer mimicking other part failures, costing the owner time and money on unnecessary parts.
Symptoms of a Failing Powertrain Control Module
- ✔ Check Engine Light is on with various, seemingly unrelated trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Misfire codes even after replacing spark plugs, wires, and coils.
Why Choose Our Programmed GM PCM 09355699?
This isn’t just a used part pulled from a junkyard. This is a complete, ready-to-install solution. We take a genuine, tested used GM PCM and flash it with the latest official GM software updates specifically for your vehicle. By providing us with your Vehicle Identification Number (VIN) during checkout, you ensure that the module you receive is perfectly calibrated for your truck’s engine, transmission, and factory options. This eliminates the need for an expensive trip to the dealership for programming.
This module, identified by part number 16258815, is a direct replacement for service number 09355699 and several others, making it a versatile solution for a wide range of popular 1998-1999 GM trucks and vans. This includes the Chevrolet S10, Blazer, Tahoe, Suburban, Express Van, and their GMC counterparts like the Sonoma, Jimmy, Yukon, and Savana. The precise programming ensures all systems communicate correctly, restoring the performance and reliability you expect from your vehicle. Our process makes replacing a complex electronic component a straightforward, plug-and-play job.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is your vehicle’s central computer. It controls and monitors the engine and transmission systems to ensure optimal performance, fuel efficiency, and emissions control.
Do I need to do anything after installing this PCM?
Because we program the module to your specific VIN, it is a plug-and-play installation. In most cases, no further action is required. However, some vehicles may require a security relearn procedure, which is a simple process that can be done without any special tools. Instructions can be easily found online for your specific model.
How do I find my vehicle’s VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard, visible through the windshield. It is also typically located on a sticker in the driver’s side doorjamb.
Is this a new part?
This is a high-quality, genuine used OEM part that has been sourced from a salvaged vehicle. Each unit is inspected and then professionally programmed with the latest GM updates to ensure it functions correctly for your vehicle.
Will this fix my check engine light?
If the check engine light and associated codes are being caused by a faulty PCM, then this replacement part will resolve the issue. It is crucial to properly diagnose the problem before ordering, as this part will not fix issues caused by other faulty sensors or mechanical problems.