Is Your Trusty GM Truck or Van Suddenly Unreliable?
There’s nothing more frustrating than turning the key on your workhorse Chevy Express, GMC Savana, or family Tahoe and getting nothing but problems. If you’re experiencing baffling issues like a no-start condition, erratic shifting, a check engine light that won’t go away, or poor fuel economy, the problem often points directly to a failing Powertrain Control Module (PCM). Don’t let a faulty computer sideline your vehicle. This is the straightforward, reliable solution to get you back on the road with confidence.
Common Symptoms of a Failing GM PCM & Your Solution
A failing engine computer can mimic a dozen other problems, leading to wasted time and money on parts you don’t need. If your vehicle is showing any of these signs, a faulty PCM is the likely culprit:
- Engine cranks but refuses to start
- Harsh or unpredictable automatic transmission shifting
- Complete loss of communication with diagnostic scan tools
- Check Engine Light with internal processor error codes (e.g., P0601, P0605)
- Stalling, sputtering, or a sudden drop in performance
This replacement GM 9355699 PCM is the definitive fix for these issues. We take a genuine, road-tested OEM computer and program it specifically to your vehicle’s VIN using the latest factory software updates from GM. This ensures perfect compatibility and restores the original performance and reliability you depend on.
An Expert’s Note: We had a customer with a ’98 Suburban used for his contracting business. The truck developed a persistent hard start and would randomly stall at intersections, making it undependable for work. After he replaced the fuel pump and ignition module with no success, he contacted us. We identified the PCM as the root cause. After installing our pre-programmed GM 9355699 PCM, the truck fired up on the first crank and has run flawlessly ever since. He was back on the job the next day, avoiding costly downtime.
Features & Benefits
- โ VIN-Programmed for Your Vehicle: We flash the computer with your specific VIN and the newest GM software, eliminating the need for an expensive trip to the dealership.
- โ Simple Installation: Designed for a direct, plug-and-play fit. In most cases, you can have your vehicle running again in under an hour. A simple security relearn procedure may be required.
- โ Cost-Effective Repair: Get the performance of a new module without the high dealer price tag. This is a smart, budget-friendly solution for keeping your older GM on the road.
- โ Restored Performance & Efficiency: With updated software and a fully functional processor, you can expect smoother shifting, better throttle response, and restored fuel economy.
- โ One-Year Warranty: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
Frequently Asked Questions
What do you need from me after I place my order?
After your purchase, simply send us your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot ship your part until we receive the VIN, as we need it to program the computer correctly for your specific truck or van.
Is this part truly ‘plug and play’?
Yes, for the most part. Because we program it to your VIN, it will control the engine and transmission correctly upon installation. However, on these GM vehicles, you may need to perform a simple security relearn procedure (often called a Passlock or VATS relearn) to allow the vehicle to start. This procedure takes about 30 minutes and does not require any special tools.
How do I know if the PCM is actually my problem?
While this part solves many common issues, we always recommend a thorough diagnosis by a qualified mechanic. Key indicators of a bad PCM include internal fault codes (like P0601), lack of communication with a scan tool while power and grounds are good, or having ruled out all other possible causes for your symptoms.
Why should I choose a used, programmed computer?
This option provides the best of both worlds: the reliability and perfect fit of a genuine OEM part combined with the latest software, all at a fraction of the cost of a new unit from a dealer. It’s the most practical way to fix your vehicle correctly.
Which vehicles does this GM 9355699 PCM fit?
This computer fits a wide range of 1998-1999 GM trucks, vans, and SUVs, including the Chevrolet Astro, Express, Suburban, Tahoe, and C/K Pickups, as well as the GMC Safari, Savana, Yukon, and Sierra models. Always match the part number from your original computer to ensure compatibility.