Is your trusty GM truck or van letting you down? Stalling, no-start conditions, or erratic behavior can sideline your workhorse, costing you time and money. When the brain of your engine fails, nothing else works right. Restore the power and reliability you depend on with this pre-owned, professionally programmed Powertrain Control Module (PCM), the definitive solution for getting your vehicle back on the road and running strong.
Common Symptoms & Your Solution
A failing engine computer can cause a host of frustrating issues that are often misdiagnosed. If you’re experiencing any of the following, a faulty PCM is a likely culprit:
- Severe drop in fuel economy
- Engine stalling or cutting out intermittently
- Failure to start, even with a good battery and starter
- Harsh or incorrect transmission shifting
- Check Engine Light with communication error codes (U-codes)
- Noticeable loss of power and poor acceleration
This unit is the direct answer to these problems. We take a quality, pre-owned computer and flash it with the latest official GM software updates, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This isn’t just a replacement part; it’s a fully integrated solution designed to restore your engine’s original performance and efficiency. For a huge range of vehicles, including the 1998-1999 GMC 3500 PCM 9366810, this is the most reliable and cost-effective repair.
Features & Benefits
- โ VIN-Programmed for Your Vehicle: We flash the module with your truck’s specific VIN, ensuring it communicates perfectly with your engine, transmission, and security systems for a true plug-and-play installation.
- โ Updated GM Software: Each unit is loaded with the newest software from General Motors, which can resolve factory bugs and improve overall performance and fuel efficiency.
- โ Restored Drivability: Eliminate stalling, rough idling, and poor shifting to get your vehicle running smoothly and dependably again.
- โ Cost-Effective Solution: Get the functionality of a new module without the steep dealership price tag. This is a smart repair for a hard-working vehicle.
- โ Broad Compatibility: This computer is a direct replacement for multiple part numbers, including 09355699, 16266645, and 9366810, taking the guesswork out of finding the right part. A correctly programmed 1998-1999 GMC 3500 PCM 9366810 is key to a lasting repair.
- โ One-Year Replacement Warranty: This unit is backed by our one-year replacement warranty for your peace of mind.
Expert Insight: The Critical Role of VIN Programming
As a technician, I’ve seen countless vehicle owners try to save a few dollars by installing a used computer from a junkyard without programming. On these late-90s GM trucks, that’s a recipe for failure. The PCM is tied to the vehicle’s security system (Passlock/VATS). A mismatched computer will result in a no-start condition every time. Our VIN programming service isn’t an add-on; it’s the most critical step. We ensure the digital handshake between the computer and your vehicle is perfect, so when you turn the key, it simply works as it should. We’re delivering a solution, not just a part.
Frequently Asked Questions
What information do you need from me after I order?
After you complete your purchase, you must provide us with your 17-digit Vehicle Identification Number (VIN). We cannot program or ship your computer without it. You can typically find your VIN on your driver’s side dashboard (visible through the windshield) or on the driver’s side door jamb sticker.
Is this unit truly plug-and-play?
Yes, because we program it to your VIN, it is designed to be a plug-and-play installation. Once installed, you may need to perform a simple security relearn procedure, which involves turning the key on and off in a specific sequence. This procedure requires no special tools and instructions can be easily found online for your specific model.
How can I be sure my old computer is the problem?
While the symptoms listed above are strong indicators, we always recommend having your vehicle professionally diagnosed before ordering. A qualified mechanic can confirm that the PCM is faulty and rule out other potential issues like bad sensors or wiring problems, saving you time and money.
Will this fit vehicles other than a 1998-1999 GMC 3500?
Absolutely. This PCM, identified by service number 9355699, fits a wide range of 1998-1999 GM trucks, vans, and SUVs. This includes the Chevy/GMC 1500/2500/3500 pickups, Suburban, Tahoe, Yukon, Express, Savana, and more. The key is matching the part number and ensuring we program it to your specific vehicle’s VIN.
Is this a new or used part?
This is a quality used computer that has been carefully sourced from a salvaged vehicle, inspected, and then programmed with the latest software for your vehicle. This provides a reliable and affordable alternative to a brand new unit.