Get Your Hard-Working Truck Running Right Again
Is your Chevrolet, GMC, or Cadillac truck or van running rough, shifting poorly, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit behind these frustrating and costly problems. This isn’t just an inconvenience; it’s a roadblock that keeps you from getting the job done. This professionally programmed, OEM engine computer is the straightforward, reliable solution to get your vehicle back on the road and running with factory precision.
Common Symptoms & Your Solution
A faulty PCM can cause a wide range of issues that mimic other component failures. Before you spend hundreds on sensors and parts you don’t need, see if your vehicle is exhibiting these classic signs of a bad engine computer:
- Persistent Check Engine Light (CEL)
- Engine stalling, sputtering, or misfiring
- Harsh or erratic automatic transmission shifting
- Complete no-start condition where the engine cranks but won’t fire
- Poor fuel economy and loss of power
- Diagnostic Trouble Codes (DTCs) related to internal module failure, such as P0601, P0603, or P0605
This unit is the definitive fix for these problems. We take a genuine, road-tested OEM computer and flash it with the latest official GM software updates, specifically matched to your vehicle using the VIN you provide. This ensures a perfect match and a true plug-and-play installation, making it the ideal choice for both DIY mechanics and professional technicians. When you need a dependable fix for your workhorse, this Programmed 1999 Chevrolet 3500 PCM is the answer.
Features & Benefits
- ✔ VIN-Specific Programming: We flash this computer with the latest GM updates using your vehicle’s VIN, ensuring it works perfectly with your specific engine, transmission, and options.
- ✔ Plug-and-Play Installation: Arrives ready to install. In most cases, you can have your truck running in under an hour with basic hand tools.
- ✔ Cost-Effective Solution: Get a reliable, programmed OEM part for a fraction of the cost of a new computer from the dealership.
- ✔ Restores Original Performance: Eliminates rough idle, poor shifting, and other performance issues, bringing back the smooth operation you depend on.
- ✔ Genuine OEM Part: This is a tested, used computer from a salvaged vehicle, offering the durability and compatibility of an original factory part.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: The Power of a Proper Program
“Over my 20 years turning wrenches, I’ve seen countless drivers chase phantom problems, replacing perfectly good sensors and solenoids, all because the root cause was a failing PCM. On these late 90s GM trucks, the programming is everything. A generic, un-programmed module simply won’t work. By flashing this unit with your specific VIN, we’re not just selling a part; we’re delivering a precise, vehicle-specific solution. It accounts for everything from your gear ratio to your tire size, which is critical for proper speedometer and transmission function. This is the correct way to get your truck back to 100%.”
Don’t let a bad computer keep your reliable truck or van sidelined. This Programmed 1999 Chevrolet 3500 PCM is your direct path to restoring performance and peace of mind. After purchase, simply provide us with your VIN, and we’ll handle the rest, shipping you a part that’s ready to get you back to work.
Frequently Asked Questions
Do I need to do anything after I install this PCM?
Yes. After installation, you will need to have a qualified mechanic with a high-end scan tool perform a Crankshaft Variation Relearn procedure, also known as a CASE Relearn. This is required for the engine to run correctly and to clear any related trouble codes. Some vehicles may also require a security relearn procedure, which can often be done without special tools.
How do I provide my VIN number?
After you complete your purchase, you can send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program or ship your part until we receive this information.
Is this a new part?
No, this is a high-quality used OEM computer that has been sourced from a salvaged vehicle. Each unit is inspected and tested before being programmed and shipped to ensure reliability.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine and transmission functions. Erratic shifting, failure to shift, or harsh engagement are very common symptoms of a failing PCM in these GM vehicles. This Programmed 1999 Chevrolet 3500 PCM is often the solution for such issues.
How can I be sure this part will fit my vehicle?
This PCM is a direct replacement for several part numbers, including 09366810 and 09355699. The best way to ensure compatibility is to provide your VIN for programming. Our process guarantees the software loaded onto the module is an exact match for your truck or van’s factory configuration.