Restore Peak Performance to Your GM Truck or Van
Is your 1998 or 1999 Chevy Suburban, Tahoe, GMC Yukon, or Express van running rough, failing to start, or displaying 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 frustrating drivability issues, poor fuel economy, and failed emissions tests. This replacement PCM, part number 09355699, is the definitive solution to restore your vehicle’s original performance and reliability.
This is a genuine, used OEM module sourced from a salvaged vehicle, ensuring perfect factory fit and function. Unlike generic aftermarket units that can cause compatibility headaches, this computer is the exact type your vehicle was built with. We take the guesswork out of the replacement process by programming the unit specifically for your vehicle using the VIN you provide. This ensures all factory settings, engine parameters, and transmission shift points are perfectly matched, just like a new module from the dealer, but at a fraction of the cost.
From the Diagnostic Bay
I once had a ’99 Tahoe come in on a tow truck. The customer had already replaced the fuel pump and ignition coil based on advice from a forum, but it still wouldn’t start. The codes were all over the place, pointing to a bad PCM. Before ordering a new one, I did a quick voltage drop test on the main PCM ground wires. Sure enough, the ground strap from the engine block to the firewall was corroded and barely making contact. After cleaning the connection points, the truck fired right up and ran perfectly. It’s a 15-minute check that can save you hundreds of dollars. Always verify your main power and ground connections before condemning the computer!
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various communication or processor codes.
- ✔ Engine cranks but refuses to start.
- ✔ Rough or erratic idling and stalling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Misfiring or stumbling during acceleration.
- ✔ No communication with a diagnostic scan tool.
Solving Your Drivability Issues with a 1998-1999 Suburban PCM
Don’t let a faulty computer keep your reliable GM truck off the road. This module is a direct replacement for a wide range of vehicles and part numbers, including 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810. By providing us with your VIN during checkout, we flash the module with the latest GM-certified software updates for your specific vehicle. This process ensures that the computer is ready for installation and will function seamlessly with your existing engine, transmission, and emissions equipment.
Installation and Security Relearn
Physical installation is straightforward. The PCM is typically located in the engine bay on the driver’s side. Simply disconnect the negative battery terminal, unplug the electrical connectors from the old PCM, unbolt it, and install the new one in its place. After reconnecting everything, you will need to perform a security relearn procedure, often called a VATS or Passlock relearn. This is a simple process that pairs the new computer to your vehicle’s anti-theft system and does not require special tools. A typical procedure is as follows:
- Attempt to start the engine. It will start and then stall. Leave the key in the ‘ON’ position.
- Wait for approximately 10-15 minutes, or until the ‘Security’ light on the dashboard turns off or stops flashing.
- Turn the key to the ‘OFF’ position for 10 seconds.
- Repeat steps 1-3 two more times for a total of three cycles.
- The vehicle should now start and run, as the new PCM is paired with your keys.
By choosing this pre-programmed 1998-1999 Suburban PCM, you are getting a cost-effective, reliable, and straightforward solution to get your truck or van running right again.
Frequently Asked Questions
Do I need to do anything after I install this PCM?
Yes. After the physical installation, you must perform the vehicle’s security relearn procedure (VATS/Passlock). This pairs the computer to your vehicle’s anti-theft system and is required for the engine to stay running. Instructions are widely available online and are included above.
Is this a new part?
No, this is a thoroughly tested, used OEM (Original Equipment Manufacturer) part that has been sourced from a salvaged vehicle. We guarantee its functionality and program it with your vehicle’s specific software.
How do I provide my Vehicle Identification Number (VIN)?
Please enter your 17-digit VIN in the notes section during checkout. If you forget, we will contact you via email after your purchase to request it. We cannot ship the module until it has been programmed with your VIN.
Will this fix my Check Engine Light?
If the PCM itself is the root cause of the fault codes, then yes, this will resolve the issue. However, if the codes are being triggered by a faulty sensor or wiring problem elsewhere on the vehicle, you will still need to diagnose and repair that underlying issue.
What if my original part number is not 09355699?
This module is a direct replacement for several part numbers, including 16266645, 16250279, 16258815, and 09366810. As long as your vehicle is listed in the compatibility chart, this module will work correctly once programmed to your VIN.