Is Your GM Truck or Van Running Rough?
If your late-90s GM vehicle, like a 1999 Cadillac Escalade, Chevy Tahoe, or GMC Yukon, is experiencing perplexing issues such as erratic shifting, poor fuel economy, a no-start condition, or an illuminated Check Engine Light, the culprit is often the brain of the operation: the Powertrain Control Module (PCM). This vital component manages everything from fuel injection and ignition timing to transmission shift points. When it fails, the symptoms can be widespread and frustrating, often mimicking other component failures and leading to costly, incorrect repairs.
Don’t replace sensors and parts blindly. A failing PCM requires a direct solution. This genuine used GM PCM, service number 9355699, is the reliable and cost-effective answer to get your vehicle running properly again. We take the guesswork and hassle out of the replacement process by pre-programming the module specifically for your vehicle using your VIN. This ensures that it arrives ready for a straightforward installation, loaded with the latest GM software updates for optimal performance and reliability.
Expert Pro Tip
Before installing your new PCM, it’s crucial to disconnect the vehicle’s battery for at least 15 minutes. This clears any stored trouble codes and allows the vehicle’s various electronic systems to reset and properly recognize the new module upon reconnection. Also, take a moment to inspect the PCM connectors for any signs of corrosion or bent pins. Clean contacts are essential for a reliable connection.
Common Symptoms of a Failing PCM
A faulty PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer may need replacement:
- ✔ Check Engine Light is on with various communication or sensor-related codes (e.g., U-codes, P0601-P0606).
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel efficiency for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Stalling, stumbling, or hesitation during acceleration.
- ✔ Misfires or rough idling.
- ✔ Failure to pass an emissions test.
The Right Solution for Your 1999 Escalade PCM
Replacing the 1999 Escalade PCM doesn’t have to mean a trip to the dealership and an expensive bill. Our service provides a fully functional, tested, and pre-programmed module that is a direct replacement for part numbers 09355699, 16266645, 16250279, and others listed in the fitment guide. We use your vehicle’s unique Vehicle Identification Number (VIN) to load the correct factory software and the most recent updates available from GM. This critical step ensures that the module communicates perfectly with your engine, transmission, and other onboard systems right out of the box.
This is not a generic, one-size-fits-all part. It is a specific solution tailored to restore your vehicle’s original functionality. By providing us with your VIN after purchase, you guarantee that the module you receive is the correct one for your truck or van’s specific options and configuration.
Frequently Asked Questions
Do I need to do anything after I install this PCM?
In most cases, this PCM is plug-and-play. Because we program it with your VIN, it should start and run the vehicle without any additional procedures. However, on some models, a security relearn procedure (often called a CASE relearn or Passlock relearn) may be necessary. This can typically be done without special tools and instructions can be easily found online for your specific model.
Where do I find my VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on a placard on the driver’s side dashboard visible through the windshield. Please provide the full 17-digit number accurately to ensure correct programming.
Is this a new part?
No, this is a high-quality, genuine used OEM part sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
Will this fix my vehicle’s problem for sure?
While this PCM will fix issues caused by a faulty module, it’s important to ensure your vehicle has been properly diagnosed. This part will not fix problems related to bad wiring, faulty sensors, or other mechanical issues. We recommend having a professional diagnosis performed if you are uncertain.
What if I order the wrong part?
Please double-check that your original module’s part number is listed in our compatibility list. Since each module is programmed to a specific VIN, it’s crucial to verify fitment before ordering. Contact us if you have any questions about compatibility.