Restore Your Truck’s Heartbeat and Drive with Confidence
Is your trusty GM truck or van starting to show its age with frustrating issues like a persistent check engine light, rough idling, or unpredictable stalling? These aren’t just annoyances; they’re signs that the central command center of your vehicle—the Powertrain Control Module (PCM)—may be failing. This isn’t just a part; it’s the brain behind your engine’s performance and reliability. Our pre-programmed PCM, service number 16250279, is the definitive solution to bring back the smooth, dependable operation you rely on every day. We take the guesswork out of the repair by flashing the module with the latest GM software updates, tailored specifically to your vehicle’s VIN. This ensures a perfect handshake between the new module and your vehicle’s systems, getting you back on the road with renewed peace of mind.
Warning Signs and How to Overcome Them
A failing PCM can manifest in a variety of confusing ways. If you’re experiencing any of the following, this module is the likely solution to restore order and efficiency:
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601 (Internal Control Module Memory Check Sum Error), P0605, or P0606.
- ✔ Unexplained drops in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling, sputtering, or refusing to start.
- ✔ Failure to pass state emissions testing.
- ✔ Noticeable loss of engine power and acceleration.
A Mechanic’s Note: The End of a Diagnostic Nightmare
I once had a customer with a ’99 Suburban who had spent months and a small fortune chasing an intermittent no-start condition. He’d replaced the battery, alternator, fuel pump, and ignition coil, but the problem persisted. The truck would run fine for a week, then leave him stranded. When he finally brought it to my shop, we scanned it and found a ghost code that pointed to an internal module fault. We installed a VIN-programmed PCM, and it was like flipping a switch. The truck started every single time. The relief on his face was immense—he finally had his reliable family vehicle back. That’s the power of addressing the root cause.
Guided Installation to Restore Peace of Mind
Replacing the PCM is a straightforward job that a confident DIYer can handle in under an hour with basic hand tools. Follow these steps for a successful installation:
- Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most of these trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side near the battery or firewall, housed in a black plastic bracket.
- Disconnect and Remove: Carefully unplug the electrical connectors. These usually have a locking tab or lever that needs to be released. Once disconnected, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Seat your new, pre-programmed PCM into the mounting bracket and secure it. Reconnect the electrical harnesses, ensuring they click firmly into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Security Relearn (If Necessary): Your vehicle may require a simple security relearn procedure to recognize the new module. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. This allows the vehicle’s anti-theft system to sync with the new PCM.
Tailored Fit for Your 1998-1999 GMC PCM and More
This module is a direct-fit replacement for service number 16250279 and is compatible with a wide range of GM vehicles. Please verify your part number and vehicle from the list below to ensure a perfect match:
- Cadillac Escalade (1999)
- Chevrolet/GMC Pickups (1500/2500/3500) (1998-1999) – Gasoline Engines
- Chevrolet/GMC Suburban (1500/2500) (1998-1999) – Gasoline Engines
- Chevrolet Tahoe / GMC Yukon (1998-1999) – Gasoline Engines
- Chevrolet Astro / GMC Safari (1998-1999)
- Chevrolet Express / GMC Savana Vans (1500/2500/3500) (1998) – Gasoline Engines
- Chevrolet S10 / GMC Sonoma / Oldsmobile Bravada / Isuzu Hombre (1998) – 4.3L V6
- Chevrolet Blazer / GMC Jimmy / GMC Envoy (1998)
- Note: This module also interchanges with part numbers 09366810 and 09355699.
Do I need to do anything after I buy this module?
Yes. After your purchase, you must provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). We use this to program the module with the correct, vehicle-specific software and the latest updates from GM before we ship it to you. This ensures it’s a true plug-and-play solution.
What is the security relearn procedure?
The security relearn, or “key cycle,” syncs your vehicle’s anti-theft system with the new PCM. The most common method is: 1) Turn the key to ON (don’t start the engine). 2) Leave it on for 10-15 minutes until the security light stops flashing. 3) Turn the key OFF for 5 seconds. 4) Repeat steps 1-3 two more times. After the third cycle, the vehicle should start.
Is this a difficult part to install myself?
Not at all! For most DIY mechanics with basic tools, this is a very manageable job. It typically involves disconnecting the battery, unplugging a few connectors, and removing a few bolts. Our step-by-step guide above can walk you through the process confidently.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine and transmission functions. If the module is failing, it can send incorrect signals to the transmission, causing harsh shifting, slipping, or delayed engagement. A new, correctly programmed PCM often resolves these communication-based transmission issues.
What if my original part number is slightly different?
This module is a direct replacement for service numbers 16250279, 09366810, and 09355699. As long as your vehicle is on our compatibility list and your original module is one of these numbers, this part will work perfectly for you.