Restore Peak Performance to Your GM Truck or SUV
Is your trusty 1998-1999 GMC Yukon, Tahoe, or Suburban suddenly acting up? If you’re dealing with a persistent Check Engine Light, frustrating stalling, erratic shifting, or a no-start condition, the culprit is often a failing Powertrain Control Module (PCM). As a technician with over two decades of experience under the hood, I’ve seen how a faulty engine computer can sideline even the most reliable vehicles. This isn’t just a part; it’s the central command for your engine’s performance and efficiency. This replacement PCM, part number 09366810, is the reliable, cost-effective solution you need to get your vehicle running smoothly again.
We take the guesswork and high dealership costs out of the equation. This is a quality, tested PCM sourced from a salvaged vehicle, which we then professionally program to your vehicle’s specific Vehicle Identification Number (VIN). By flashing it with the latest official GM software updates, we ensure it corrects common factory-known issues and optimizes performance. This means you get a component that’s ready for installation right out of the box, saving you from a costly trip to the dealer for programming.
From the Diagnostic Bay
I remember a customer with a ’99 Suburban who was ready to sell it for scrap. It had an intermittent no-start problem that two other shops couldn’t solve. They replaced the fuel pump, the crank sensor, everything. The truck would run fine for days, then refuse to start. When I hooked up my scope, I saw the 5-volt reference signal to the sensors would occasionally drop to zero during cranking. That’s a classic internal PCM failure. We installed a VIN-programmed module just like this one, performed the security relearn, and that Suburban is still hauling his family today. Sometimes, the simplest solution is the right one.
Is Your Truck Showing These Telltale Signs?
A failing PCM can cause a wide range of symptoms. If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs attention:
- âś” Persistent Check Engine Light with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- âś” Unexplained stalling or engine cutting out while driving.
- âś” Harsh or erratic automatic transmission shifting.
- âś” A no-start condition where the engine cranks but won’t fire up.
- âś” Noticeable decrease in fuel economy.
- âś” Failure to communicate with a diagnostic scan tool.
Your Straightforward Installation Guide
Replacing the PCM in these GM vehicles is a job most DIYers can handle in their own driveway. The key is the security relearn procedure after the physical swap. Follow these steps carefully:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- Locate the PCM: On most of these trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side inner fender or near the battery.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New PCM: Bolt the new module into place and securely reconnect all wiring harnesses. Make sure they click into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn (CRITICAL): This step pairs the new PCM to your vehicle’s anti-theft system. Insert the key and turn it to the ‘ON’ position (don’t start the engine). The ‘Security’ light should be on or flashing. Leave the key ‘ON’ for 10-11 minutes, or until the light goes out. Turn the key ‘OFF’ for 5 seconds. Repeat this cycle two more times for a total of three 10-minute cycles. After the third cycle, the vehicle should start and run normally.
Verified Vehicle Compatibility
This module is a direct replacement for multiple part numbers and fits a wide range of GM vehicles. Please match your vehicle and original part number (often ID 09355699) from the list below. This part replaces: 09355699, 16266645, 16250279, 16258815, and 09366810.
- Cadillac Escalade: 1999
- Chevrolet/GMC Pickups (1500, 2500, 3500): 1998-1999 (Gasoline)
- Chevrolet/GMC Suburban (1500, 2500): 1998-1999 (Gasoline)
- Chevrolet Tahoe / GMC Yukon: 1998-1999
- Chevrolet Astro / GMC Safari: 1998
- Chevrolet Express / GMC Savana Vans (1500, 2500, 3500): 1998-1999 (Gasoline)
- Oldsmobile Bravada: 1998 (4.3L)
- GMC Envoy: 1998
- Chevrolet S10 / GMC Sonoma / S15 Jimmy: 1998 (4.3L)
- Isuzu Hombre: 1998 (4.3L)
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential. We use it to load the exact, correct GM software for your truck’s specific engine, transmission, and options. This ensures perfect compatibility and function, eliminating the need for a trip to the dealer.
Is this part difficult to install?
The physical replacement is very simple, typically involving a few bolts and electrical connectors. The most important part is performing the 30-minute security relearn procedure correctly, which requires no special tools, just patience.
Will this fix my check engine light?
If the check engine light is caused by an internal PCM failure (like code P0601), this module is the correct fix. However, always ensure you’ve diagnosed the vehicle properly, as other failing sensors can also trigger warning lights.
What if my original part number is slightly different?
This module is a direct replacement for several part numbers, including 09355699, 16266645, 16250279, 16258815, and 09366810. As long as your vehicle is on the compatibility list and you have one of these interchangeable numbers, this part will work perfectly once programmed to your VIN.