Tired of Your Truck Running Rough? Get Back on the Road with Confidence.
There’s nothing more frustrating than a reliable truck that suddenly won’t start, idles poorly, or throws random check engine lights. If your GMC or Chevy is stalling, shifting erratically, or failing to communicate with scan tools, a failing Powertrain Control Module (PCM) is often the culprit. This isn’t just an inconvenience; it’s downtime you can’t afford. Stop throwing parts at the problem and get the definitive solution that restores your vehicle’s performance and your peace of mind.
Common Symptoms & Your Solution
A faulty engine computer can cause a wide range of confusing issues. If you’re experiencing any of the following, this VIN-programmed PCM is the reliable fix you need:
- Check Engine Light (CEL) Illumination: Particularly for codes related to internal module failure, sensor circuits (P0600, P0601, P0605), or communication errors.
- No-Start or Intermittent Stalling: The engine may crank but won’t fire up, or it may stall unexpectedly while driving.
- Poor Engine Performance: Noticeable loss of power, rough idling, hesitation, or a significant drop in fuel economy.
- Erratic Transmission Shifting: Harsh shifts, delayed engagement, or getting stuck in one gear (limp mode), as the PCM controls transmission functions.
- Communication Issues: Your diagnostic scan tool is unable to connect with the 1998-1999 GMC 1500 PCM.
Features & Benefits You Can Count On
- ✔ Plug & Play Installation: This unit arrives pre-programmed to your vehicle’s specific VIN. This means no expensive trips to the dealership for programming—it’s ready to install right out of the box.
- ✔ Updated GM Software: We flash the module with the latest software updates from General Motors, ensuring optimal performance, fuel efficiency, and reliability.
- ✔ Guaranteed Compatibility: This is a genuine OEM part sourced from a salvaged vehicle, guaranteeing a perfect fit and seamless integration with your truck’s systems.
- ✔ Cost-Effective Repair: Get a fully functional, programmed computer for a fraction of the cost of a new unit from the dealer.
- ✔ Warranty Protection: This unit is backed by our one-year replacement warranty.
A Veteran Technician’s Insight: On these late-90s GM trucks, the PCM is the heart of the entire vehicle. It’s not just about fuel and spark; it controls the transmission and communicates with the anti-theft system (VATS/Passlock). A generic, non-programmed module simply will not work. By programming this 1998-1999 GMC 1500 PCM to your exact VIN, we ensure all factory options and security protocols match perfectly, preventing the no-start condition that plagues improper installations. This is the correct way to do the job.
Frequently Asked Questions
Do I need to do anything after I install the PCM?
In most cases, you may need to perform a simple security relearn procedure, which can be done without any special tools and typically takes about 30 minutes. We can provide you with instructions for this process. This ensures the PCM syncs with your vehicle’s anti-theft system.
How do I provide my vehicle’s VIN?
After you complete your purchase, simply reply to your order confirmation email with your 17-digit VIN, or add it to the ‘notes’ section during checkout. We cannot ship your part until we receive this information.
Is this a new part?
No, this is a thoroughly tested, used OEM part that was carefully removed from a salvaged vehicle. This ensures original factory quality and compatibility at a great value.
Will this fit vehicles other than a 1998-1999 GMC 1500 PCM?
Yes. This module is compatible with a wide range of GM trucks, vans, and SUVs from that era, including the Chevy Silverado, Suburban, Tahoe, Express, and GMC Sierra/Yukon/Savana. Please check the detailed fitment list on this page and ensure your part number is listed to confirm compatibility.
Can a bad PCM cause my transmission to shift hard?
Absolutely. The PCM controls the electronic solenoids inside the transmission that manage shifting. A failing module can send incorrect signals, leading to harsh shifts, delayed engagement, or being stuck in gear. Replacing the PCM often resolves these types of transmission issues.