Restore Your Truck’s Performance and Reliability
Is your trusty 1998-1999 Chevrolet 2500 Pickup suddenly giving you headaches? Unexplained stalling, a persistent check engine light, or rough running can sideline even the toughest work truck. The Powertrain Control Module (PCM), the vehicle’s central computer, is often the culprit behind these frustrating issues. When it fails, it can feel like a complex and expensive repair. This is the straightforward, reliable solution you’ve been looking for. We provide a high-quality replacement PCM, professionally programmed with the latest GM software updates specifically for your truck’s Vehicle Identification Number (VIN). This isn’t just a part; it’s a complete, ready-to-install fix that restores your engine’s proper function, fuel efficiency, and smooth operation.
Case Study: A Tricky Diagnosis
A customer brought in a ’99 GMC 2500 with a gasoline engine, a truck almost identical to the Chevy 2500. The complaint was intermittent stalling at stoplights and a random no-start condition that would fix itself after sitting for an hour. The owner had already replaced the fuel pump and ignition control module, but the problem persisted. After connecting my scanner, I saw no communication with the PCM at times. This is a classic red flag. Instead of throwing more parts at it, we confirmed power and ground to the computer were solid. The only logical conclusion was an internal failure in the PCM itself, likely due to heat cycles and age cracking solder joints on the main board. We installed a VIN-programmed module just like this one, and the truck has been running perfectly ever since. It saved the owner hundreds in further diagnostic guesswork and unnecessary parts.
Is Your Truck Showing These Signs of a Bad PCM?
A failing computer can manifest in many ways. If you’re experiencing any of the following, a faulty PCM could be the root cause. This is especially true after you’ve ruled out more common issues like sensors or fuel delivery problems.
- ✔ Engine stalling or misfiring for no apparent reason
- ✔ Complete no-start condition where the engine cranks but won’t fire
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Significantly decreased fuel economy
- ✔ Check Engine Light is on with communication error codes (like U0100) or internal processor fault codes (like P0601, P0605, P0606)
- ✔ Failure to pass an emissions test
A Straightforward Guide to Installation
Replacing the 1998-1999 Chevrolet 2500 PCM is a job most DIY mechanics can handle in their own driveway. Our VIN programming makes this a true plug-and-play process.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these GM trucks, the PCM is located in the engine compartment on the driver’s side (LH), often near the fender or firewall.
- Disconnect the Connectors: Carefully unclip and remove the wiring harness connectors from the old module. There are typically multiple color-coded connectors; they only fit one way, so you can’t mix them up.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you will need it for the new unit.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and secure it with the original bolts.
- Reconnect Everything: Firmly plug the wiring harness connectors into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: Some vehicles may require a security relearn procedure, which typically involves cycling the key. Your vehicle’s service manual will have the specific, simple steps if needed. Now, start your engine and enjoy the restored performance!
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 09355699, 16250279, and 09366810. Please verify your original part number or consult the list below. This part is guaranteed to fit the following vehicles:
CHEVROLET 2500 PICKUP 98-99 (Gasoline)
CHEVROLET 3500 PICKUP 98-99 (Gasoline)
ASTRO 98-99 (4.3L)
BLAZER S10/JIMMY S15 98 (w/o build date opt ZN4)
BRAVADA 98 (w/o build date opt ZN4)
ESCALADE 99
EXPRESS/SAVANA 1500/2500/3500 VANS 98 (Gasoline)
GMC 1500 PICKUP 98-99 (Gasoline)
GMC 2500 PICKUP 98-99 (Gasoline)
GMC 3500 PICKUP 98-99 (Gasoline)
ENVOY 98 (w/o build date opt ZN4)
ISUZU HOMBRE 98 (4.3L, w/o extended build date opt ZN4)
SAFARI (GMC) 98-99
S10/S15/SONOMA 98 (4.3L, w/o build date opt ZN4)
SUBURBAN 1500/2500 98-99 (Gasoline)
TAHOE/YUKON 98-99 (Gasoline)