Restore Peak Performance to Your GMC Truck
Is your 1998-1999 GMC 3500 Pickup suffering from frustrating issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your truck’s engine and transmission. A faulty PCM can disrupt everything from fuel injection timing to spark delivery, leading to unreliable performance and potentially leaving you stranded. Don’t let a failing computer dictate your truck’s health. This direct-fit replacement PCM is the definitive solution to restore your vehicle’s factory performance and reliability.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Failure to pass state emissions testing.
Your Direct-Fit 1998-1999 GMC 3500 PCM Solution
This isn’t just a replacement part; it’s a complete, plug-and-play solution. We eliminate the guesswork and the expensive trip to the dealership. Before we ship your module, our technicians will program it with the latest GM-certified software updates specifically for your truck using the Vehicle Identification Number (VIN) you provide. This ensures that all engine and transmission parameters are perfectly calibrated for your vehicle’s original specifications, restoring its intended performance and efficiency. This module is a direct replacement for part numbers 16250279, 09366810, and 09355699, guaranteeing compatibility.
Installation is straightforward. Simply locate your old module in the engine compartment (typically on the driver’s side), disconnect the battery, unplug the wiring harnesses, and swap in the new unit. Once installed, you may need to perform a simple security relearn procedure, which can often be done without any special tools. By purchasing a pre-programmed 1998-1999 GMC 3500 PCM from us, you’re getting a reliable, fully updated component that’s ready to get your workhorse back on the road.
Frequently Asked Questions
Do I need to have this PCM programmed by a dealer?
No. This module comes fully programmed to your vehicle’s specific VIN before it is shipped. It arrives ready for installation, saving you time and the high cost of dealership programming.
What information do you need from me?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. This allows us to load the correct GM software and calibrations for your truck’s specific engine, transmission, and options.
Where is the PCM located on my 1998-1999 GMC 3500?
On most 1998-1999 GMC 3500 Pickups, the PCM is located in the engine compartment on the driver’s side, near the firewall or inner fender.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty PCM, this replacement module will resolve the issue. It’s crucial to ensure that the underlying problem isn’t with a sensor or other component that the PCM is monitoring.
What is a security relearn or CASE relearn procedure?
After installation, your vehicle’s anti-theft system (Passlock/VATS) may need to be synchronized with the new PCM. This is a simple procedure that usually involves turning the key to the ‘ON’ position for 10-15 minutes. A CASE (Crankshaft Angle Sensor Error) relearn may also be needed to prevent a P1336 code, which requires a scan tool.