Restore Peak Performance to Your GM Truck or SUV
Is your 1998-1999 Chevrolet Tahoe, Suburban, or GMC Yukon running rough, stalling, or refusing to start? The Powertrain Control Module (PCM) is the electronic brain of your vehicle, managing everything from fuel injection and spark timing to transmission shifting. When it fails, it can cause a wide range of frustrating and difficult-to-diagnose issues. This replacement PCM is the definitive solution to get your reliable GM truck back on the road with confidence.
This is a thoroughly tested, genuine used OEM computer that has been sourced from a salvaged vehicle. We eliminate the guesswork and costly dealership visits by programming the module specifically for your vehicle before it ships. Simply provide us with your Vehicle Identification Number (VIN) after your purchase, and our technicians will flash the unit with the latest factory software updates from GM. This ensures perfect compatibility and restores the original performance and efficiency of your engine.
From the Diagnostic Bay
We once had a ’99 Suburban towed in that had already been through two new fuel pumps in a month. The owner was convinced it was another bad pump. A quick check with our diagnostic tools showed the PCM wasn’t consistently commanding the fuel pump relay. It was an intermittent driver failure inside the computer. A replacement, programmed PCM like this one fixed the issue permanently, saving the customer from buying a third unnecessary fuel pump and the associated labor costs.
Is Your Vehicle Exhibiting These Symptoms of PCM Failure?
A failing 1998-1999 Tahoe PCM can manifest in various ways. If you’re experiencing any of the following, a faulty computer is a very likely culprit:
- ✔ Check Engine Light is on with various communication or sensor codes.
- ✔ The engine cranks but refuses to start.
- ✔ Stalling unexpectedly while driving or at idle.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Failure to pass an emissions test.
A Simple, Programmed Solution
Don’t let a bad computer keep your truck sidelined. Our process is designed to be as simple as possible. Once you place your order, we’ll contact you for your VIN. Our experts then program this module to match your vehicle’s exact specifications, including engine size, transmission type, and any specific options. The result is a part that is ready for installation right out of the box. While the physical installation is straightforward for most DIY mechanics, please note that a security relearn procedure or a Crankshaft Variation (CASE) relearn may be required with a scan tool after installation to ensure perfect communication between the new PCM and your vehicle’s systems.
This module is a direct replacement for multiple part numbers, including 16266645, 09355699, 9355699, 16250279, 16258815, 09366810, and 9366810. It fits a wide array of GM vehicles from the era, such as the Chevrolet and GMC Pickups (1500, 2500, 3500), Suburban, Tahoe, Yukon, Express, Savana, and more. Restore the reliability you depend on with a quality, pre-programmed 1998-1999 Tahoe PCM.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming for you before shipping. The module arrives flashed to your vehicle’s VIN with the latest GM software updates.
Is this a new part?
No, this is a genuine, used OEM part that has been carefully inspected and tested to ensure it is fully functional.
Where is the PCM located on my 1999 Tahoe?
On most 1998-1999 Tahoes, Yukons, and Suburbans, the PCM is located in the engine compartment on the driver’s side (LH side), often near the firewall or inner fender.
What is a CASE relearn and will I need to do one?
A CASE (Crankshaft Angle Sensor Error) relearn is a procedure that synchronizes the new PCM with your engine’s crankshaft position sensor. In many cases, it is required after installation to prevent a check engine light. This procedure must be performed with a compatible professional-grade scan tool.
How do I provide my VIN?
After you complete your purchase, we will send you instructions on how to reply with your vehicle’s 17-digit VIN. We cannot ship the part until we receive this information.
Will this fix my specific problem?
If your vehicle’s issues have been correctly diagnosed as a faulty PCM, this part will resolve them. It is crucial to ensure the PCM is the root cause, as other failing sensors or wiring problems can mimic PCM failure.