Is Your GM Truck or Van Experiencing Mysterious Engine Problems?
If your 1998-1999 Chevy Tahoe, Suburban, C/K Pickup, or another compatible GM vehicle is suffering from issues like stalling, rough idling, a persistent check engine light, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. The PCM is the central computer of your vehicle, responsible for managing everything from fuel injection and spark timing to transmission shifting and emissions control. When it fails, it can cause a wide range of frustrating and difficult-to-diagnose problems.
This isn’t just a replacement part; it’s a complete, plug-and-play solution. We offer a genuine, used GM PCM (part number 09355699) that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates perfectly with your truck’s existing systems. We also flash it with the latest software updates from General Motors, which can resolve underlying drivability issues that may have existed since the factory. Stop chasing symptoms and address the root cause of your vehicle’s electronic issues.
From the Diagnostic Bay
I once had a 1999 Suburban in the shop that was driving the owner crazy. It would randomly stall at stoplights and had an intermittent misfire that no one could pinpoint. The owner had already replaced the spark plugs, wires, cap, rotor, and even the fuel pump. After hours of diagnostics, we found that the PCM’s driver for the ignition coil was failing intermittently under heat. A simple swap with a correctly programmed PCM like this one had the truck running perfectly in under an hour. It’s a reminder that sometimes the ‘brain’ is the problem, not the parts it controls.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Vehicle cranks but will not start (no-start condition).
- ✔ Failure to communicate with a diagnostic scan tool.
- ✔ Intermittent electrical issues that seem to have no source.
The Right Solution for Your 1998-1999 Tahoe PCM
Choosing a pre-owned, programmed PCM is a smart and economical way to get your vehicle back to factory-spec performance. Dealerships often charge a premium for a new module and additional fees for programming. Our process is simple: you provide your VIN, and we handle the complex programming before the part ever leaves our facility. This ensures a direct-fit, functional replacement for part number 09355699 and a host of other compatible service numbers. By using a genuine used GM part, you maintain the original equipment integrity of your vehicle’s electronics.
Installation Note: While this module is programmed for plug-and-play functionality, many GM vehicles of this era require a Security Relearn or Crankshaft Variation (CASE) relearn procedure after installation. This is a simple process that can often be done without special tools and is necessary to sync the new PCM with your vehicle’s anti-theft system and crankshaft position sensor. Instructions for these procedures are widely available online or in service manuals.
Frequently Asked Questions
Do I need to do anything after I install this PCM?
Yes, in most cases, you will need to perform a Security Relearn procedure so the PCM recognizes your vehicle’s keys and anti-theft system. You may also need to perform a CASE (Crankshaft Position System Variation) relearn. Both are standard procedures after a PCM replacement on these vehicles.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. We require it to load the exact correct software and calibrations for your vehicle’s specific engine, transmission, and options package. This ensures perfect compatibility and performance.
Is this a new part?
No, this is a thoroughly tested, genuine used part sourced from a salvaged vehicle. We guarantee its functionality and program it with the latest software to provide a reliable and cost-effective solution.
How do I find my current PCM’s part number?
Your PCM’s part number is printed on a sticker on the module itself. On most GM trucks and vans from this era, it’s located in the engine bay, often on the driver’s side fender or near the battery. The number will typically be a large 8-digit number, like 09355699.
Will this computer fix my transmission shifting problems?
It absolutely can. The Powertrain Control Module controls both the engine and the transmission. If the module is faulty, it can cause a variety of shifting issues, such as delayed shifts, hard shifts, or getting stuck in a gear. Replacing a faulty PCM often resolves these problems.