Get Your GM Workhorse Running Right Again
Is your trusty 1998-1999 GM truck, van, or SUV suddenly stalling, shifting erratically, or refusing to start? You’re likely dealing with a failing Powertrain Control Module (PCM), the central computer that manages your engine and transmission. A faulty PCM can cause endless frustration, leaving you stranded and costing you valuable time. This pre-programmed engine computer is the straightforward, reliable solution to get your vehicle back on the road and running strong, without the exorbitant costs and delays of a dealership visit.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing PCM is the most probable cause. This unit is the definitive fix for:
- Intermittent or complete no-start conditions
- Harsh or unpredictable transmission shifting
- Poor fuel economy and reduced engine power
- Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs)
- Stalling for no apparent reason while driving or at idle
- Inaccurate or non-functioning dashboard gauges
Instead of wrestling with a complex diagnosis, you can solve the problem with our expertly prepared Programmed 09355699 PCM. We take a quality, inspected module and flash it with the latest official GM software, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). It arrives ready for a simple installation, saving you hundreds on programming fees.
Features & Tangible Benefits
- ✔ VIN-Programmed for Your Vehicle: This isn’t a generic, one-size-fits-all part. We flash the computer to your exact VIN, ensuring it communicates perfectly with your vehicle’s systems right out of the box. No expensive dealer programming is required.
- ✔ Flashed with Latest GM Updates: Your PCM will be loaded with the most current GM software available for your truck or van. This often resolves factory bugs and improves performance, transmission shifting, and fuel efficiency.
- ✔ Direct-Fit Replacement: Guaranteed to function correctly for a wide range of service numbers, including 09355699, 16266645, 9366810, and more. This ensures a perfect, hassle-free physical and electronic fit.
- ✔ Rigorously Inspected Hardware: Sourced from operational vehicles, each computer is carefully inspected to ensure the hardware is sound and ready for years of continued service. Get dependability you can count on.
- ✔ One-Year Replacement Warranty: This unit is backed by our one-year replacement warranty, giving you complete confidence and peace of mind in your repair.
Expert Insight: The Smart Fix for an Aging Classic
These late-90s GM trucks are legendary for their durability, but after 20+ years, the electronic components are reaching the end of their service life. The original PCMs are prone to failure from countless heat cycles and vibrations, causing internal solder joints and processors to break down. The challenge today isn’t just finding a replacement, but finding a shop with the outdated tools (like the Tech 2) and knowledge to program it. Our service bridges that gap. We handle the complex programming so you get a reliable, updated Programmed 09355699 PCM that you or your mechanic can install in under an hour, solving the problem correctly the first time.
Frequently Asked Questions
How does the VIN programming process work?
It’s simple. After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. Our technicians will use this number to flash the computer with the exact GM calibration file for your truck or van’s specific engine, transmission, and options.
Is this part truly “plug and play”?
For most vehicles on the fitment list, yes. Once installed, you will need to perform a security relearn procedure (often called a Passlock or VATS relearn). This is a simple process that typically involves turning the key on and off in a specific sequence and does not require any special tools. Instructions are widely available online for your specific model.
Why should I choose a used, programmed computer?
This approach offers the best balance of reliability and value. You get a dependable, genuine GM part that has been professionally flashed with the latest software, all for a fraction of the cost of a new module from a dealer. It’s the most cost-effective way to get your vehicle running properly again.
Do I need to send my old computer back (core charge)?
No, there is no core charge or need to return your old, faulty PCM. You can dispose of it as you see fit.
How can I be sure this is the right part number for my vehicle?
The best way is to check the service number on your current computer. This unit replaces a wide range of part numbers, including the common 09355699 and 9366810. If your number is listed in our description, this part is a compatible replacement. Providing your VIN ensures we program it perfectly for your application.