Restore Peak Performance to Your GM Truck
Is your trusty Chevrolet or GMC truck starting to show its age with frustrating, hard-to-diagnose issues? If you’re dealing with a persistent check engine light, erratic shifting, poor fuel economy, or a no-start condition that has you stumped, the root cause is often the vehicle’s brain: the Powertrain Control Module. This isn’t just a replacement part; it’s a new lease on life for your engine and transmission. We provide a fully programmed 1998-1999 Chevrolet 2500 PCM that arrives ready to install, taking the guesswork and expensive dealership visits out of the equation. Simply provide your VIN at checkout, and we’ll flash the module with the latest GM-certified software specifically for your vehicle. Get back the smooth, reliable performance you depend on.
Is a Failing PCM Sidelining Your Truck?
A faulty PCM can manifest in a variety of confusing ways. Before you start replacing expensive sensors and components, check if your truck is exhibiting any of these classic signs of PCM failure:
- ✔ Check Engine Light (CEL) Illumination: Often with communication-related codes like U0100 or specific sensor circuit codes (e.g., P0101, P0300 series).
- ✔ Harsh or Inconsistent Shifting: The transmission may slam into gear, hesitate, or get stuck in one gear (limp mode).
- ✔ Engine Performance Problems: Unexplained stalling, rough idling, misfires, or a significant drop in power and fuel efficiency.
- ✔ Complete No-Start Condition: The engine cranks but won’t start, and you’ve ruled out fuel and spark issues.
- ✔ Failed Emissions Test: Inability of the onboard diagnostic system to complete its readiness monitors.
Guided Installation to Restore Peace of Mind
Replacing the PCM is a straightforward job you can tackle with basic hand tools. Regain the confidence of a well-running truck by following these simple steps:
- Safety First: Disconnect the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most of these trucks, the PCM is located in the engine compartment on the driver’s side, near the fender or firewall. It’s a silver metal box with multiple large wiring harness connectors.
- Disconnect the Harnesses: Carefully release the locking tabs on each electrical connector and gently pull them away from the module. Avoid forcing them.
- Remove the Old PCM: Unbolt the mounting brackets holding the old module in place and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed module in the same location, securing it with the original hardware.
- Reconnect and Finalize: Plug the wiring harnesses back in, ensuring they click securely into place. Reconnect the negative battery terminal. Your truck is now ready to start. In some cases, a security relearn procedure may be necessary, which can be found in your owner’s manual or online.
Tailored Fit for Your Ride
This module is a direct-fit replacement, guaranteed to be compatible with the following vehicles and part numbers. This specific listing is for a 1998-1999 Chevrolet 2500 PCM, but it also fits a wide range of other GM models. Please verify your original part number matches one of the following: 16250279, 09366810, or 09355699.
- Cadillac Escalade: 1999
- Chevrolet/GMC Pickups (1500, 2500, 3500): 1998-1999 (Gasoline engines)
- Chevrolet/GMC Vans (Express, Savana 1500, 2500, 3500): 1998
- Chevrolet Astro / GMC Safari: 1998-1999
- Chevrolet S10 / GMC Sonoma: 1998
- Chevrolet Blazer / GMC Jimmy / Oldsmobile Bravada: 1998
- Chevrolet Tahoe / GMC Yukon: 1998-1999
- Chevrolet/GMC Suburban (1500, 2500): 1998-1999
- GMC Envoy: 1998
- Isuzu Hombre: 1998 (4.3L V6)
Frequently Asked Questions
Do I need to do any programming myself?
No. This module is delivered to you fully programmed for your vehicle. All you need to do is provide us with your vehicle’s VIN (Vehicle Identification Number) during or after your purchase, and we handle all the flashing with the latest GM software updates before it ships.
What is a VIN and where do I find it?
The VIN is a unique 17-digit code for your vehicle. You can typically find it on a plate on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my specific problem?
This PCM is a direct solution for issues caused by a faulty module. While it resolves a wide range of engine and transmission problems, we always recommend a proper diagnosis by a qualified mechanic to confirm the PCM is the source of your issue before purchasing.
Is a security or CASE relearn required after installation?
On many GM vehicles of this era, a simple security relearn procedure (often called the Passlock relearn) may be needed to allow the vehicle to start. This procedure typically involves turning the key to the ‘ON’ position for 10-15 minutes and can be done without special tools. A Crankshaft Variation (CASE) relearn might be needed to clear a P1336 code, which requires a capable scan tool.
What if I order the wrong part?
We strongly encourage you to verify compatibility by matching your original part number to those listed (16250279, 09366810, 09355699) and checking the fitment list. If you’re unsure, please contact us with your VIN before ordering, and our experts will be happy to help you find the exact part you need.