Is Your 1998-1999 GM Truck or SUV Running Rough?
If you’re dealing with frustrating issues like stalling, erratic shifting, a persistent check engine light, or a no-start condition, the problem might be a failing Powertrain Control Module (PCM). This computer is the brain of your vehicle’s engine and transmission, and when it starts to fail, it can cause a wide range of confusing and difficult-to-diagnose symptoms. Don’t let a faulty computer keep your reliable truck off the road. This genuine used PCM, part number 16258815, is the straightforward, cost-effective solution you need.
From the Diagnostic Bay
I once had a ’99 Suburban in the shop that was driving the owner crazy. It would randomly stall at stoplights, but never consistently. He’d already replaced the fuel pump and ignition coil with no luck. After hours of chasing wires, we finally traced it to an internal fault in the PCM that would only show up when the module got hot. Swapping in a correctly programmed PCM solved the problem instantly. These intermittent issues are classic signs of a failing computer, and replacing the module is often the only permanent fix.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is on with various communication or sensor codes.
- ✔ Engine stalls, stumbles, or misfires intermittently.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Vehicle won’t start, even with a good battery and starter.
- ✔ Noticeable decrease in fuel economy.
- ✔ Failure to pass an emissions test.
- ✔ Other warning lights appearing on the dash cluster.
The Plug-and-Play Solution: Your 1998-1999 Tahoe PCM
Finding a replacement computer is only half the battle. A PCM from another vehicle won’t work correctly unless it’s programmed specifically for your truck’s Vehicle Identification Number (VIN). This process typically requires an expensive trip to a dealership. We eliminate that hassle. When you order from us, we flash this module with the latest GM software updates using your specific VIN. This ensures that it communicates perfectly with your engine, transmission, and all other onboard systems, restoring original factory performance and reliability. This is a direct-fit replacement for a wide range of 1998-1999 GM trucks, vans, and SUVs, including the Chevrolet Tahoe, Suburban, C/K Pickups, GMC Yukon, Savana, and more. Please verify your original part number or the service ID number 9355699 to ensure compatibility.
Installation is straightforward for a DIY mechanic. The module is typically located in the engine compartment. After disconnecting the battery, you simply unplug the electrical connectors from the old unit, unbolt it, and install the new one in its place. In some cases, a Crankshaft Variation Relearn (often called a CASE relearn) may be necessary, which can be performed by any professional shop with a compatible scan tool.
Frequently Asked Questions
Do I need to program this PCM?
No. We program the module for you before it ships. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and we will flash it with the correct software for your specific vehicle configuration.
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. While not always required, it is sometimes necessary after a PCM replacement to prevent a P1336 trouble code. This procedure must be done with a compatible bi-directional scan tool and can be performed by most automotive repair shops.
Is this a new part?
This is a high-quality, genuine GM part sourced from a salvaged vehicle. Each unit is thoroughly inspected and tested to ensure full functionality before being programmed and shipped.
Where can I find my VIN?
You can find your 17-digit Vehicle Identification Number (VIN) on the driver’s side of the 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?
If your vehicle’s issues are caused by a faulty PCM, this part will resolve them. However, it’s crucial to properly diagnose the problem, as other failing components (like sensors or wiring) can cause similar symptoms. This module will correct issues directly related to the computer itself.