Restore Peak Performance to Your GM Truck or SUV
Is your 1998 or 1999 Chevy Suburban, Tahoe, or GMC Yukon running rough, stalling, or showing a persistent check engine light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission. A faulty PCM can lead to a cascade of frustrating issues, from poor fuel economy and failed emissions tests to a vehicle that won’t start at all. This replacement PCM, part number 16250279 (interchangeable with ID 9355699), is the reliable, cost-effective solution to get your truck back in top condition.
The Brain of Your Vehicle: Why the PCM is Critical
The PCM in your late-90s GM vehicle is a sophisticated computer responsible for interpreting data from dozens of sensors. It controls vital functions like fuel injection timing, spark advance, transmission shift points, and emissions systems. When it begins to fail, the signals it sends become erratic, causing the engine and transmission to behave unpredictably. Simply ignoring the symptoms can lead to further damage to expensive components like the catalytic converter or transmission.
From the Diagnostic Bay
I once had a 1999 Tahoe come in that the owner had spent a fortune on. He’d replaced the fuel pump, all eight injectors, and the ignition coil trying to solve an intermittent stalling and misfire issue. The codes were all over the place. After hooking up a scope, we found that the control signal for two of the injectors was dropping out randomly. The injectors were fine; the driver circuit inside the original PCM was failing. We installed a VIN-programmed module just like this one, performed the security relearn, and the truck ran perfectly. It’s a powerful reminder that the problem isn’t always the part being controlled, but the computer doing the controlling.
Diagnosing a Faulty 1998-1999 Suburban PCM
Identifying a failing PCM can be tricky, as its symptoms often mimic other part failures. However, if you’re experiencing several of the following issues simultaneously, the PCM is a likely culprit. This module is the correct solution for a wide range of GM trucks, vans, and SUVs from this era, ensuring broad compatibility and a precise fit.
Common Symptoms of PCM Failure
- ✔ Persistent Check Engine Light with various engine or communication codes (e.g., P0601, P0605).
- ✔ Engine stalling unexpectedly or refusing to start.
- ✔ Rough or erratic idling and poor engine performance.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Failure to pass state emissions inspections.
- ✔ Intermittent issues that seem to have no clear cause.
A True Plug-and-Play Solution
Don’t waste time and money at the dealership. We take the guesswork out of the replacement process. This is a genuine, used OEM module that has been thoroughly tested. Before we ship it, our technicians will program it with the latest GM software updates specifically for your vehicle using the VIN you provide. This critical step ensures that the module communicates perfectly with your truck’s specific engine, transmission, and options, making installation as simple as swapping the part and performing a quick security relearn procedure.
This unit is a direct replacement for multiple part numbers, including 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810. Please verify your part number or the ID 9355699 to ensure compatibility.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. We handle the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the correct factory software for your specific vehicle.
Will I need to perform any other procedures after installation?
Yes, in most cases you will need to perform a security relearn procedure, also known as a CASE relearn or anti-theft relearn. This is a simple process that can be done without special tools and typically involves turning the key in the ignition in a specific sequence. Instructions are readily available online for your specific model.
Is this a new part?
This is a high-quality, tested, and fully functional used OEM part sourced from a salvaged vehicle. This provides you with a genuine factory component at a fraction of the cost of a new one from a dealer.
How do I find my vehicle’s VIN?
Your VIN can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
What if my part number isn’t listed but my vehicle is?
The most important number to match for this era of GM vehicles is the service ID number, which is 9355699 for this module. If your vehicle is listed in the compatibility chart and your original module has ID 9355699, this part will work for you.