Is Your 1999 Escalade or GM Truck Running Rough?
If you’re dealing with frustrating issues like a no-start condition, erratic shifting, stalling, or a persistent check engine light that won’t go away, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, when the PCM goes bad, it can create a host of confusing and debilitating symptoms. I’ve seen it countless times in my shop: a beautiful ’99 Yukon or Tahoe comes in on a tow truck, completely dead, and after confirming good power and ground at the module, the diagnosis is a failed PCM.
This isn’t just a replacement part; it’s a direct, hassle-free solution. We are offering a genuine, used OEM PCM with service number 09355699, professionally programmed with the latest GM software updates specifically for your vehicle. All we need is your VIN. This eliminates the need for expensive dealership programming or specialized scan tools, getting your truck back on the road faster.
Solving Your Vehicle’s Problems with a 1999 Escalade PCM
A faulty PCM can manifest in many ways. Over my 20+ years turning wrenches, I’ve diagnosed hundreds of these specific modules on the GMT400 platform. This part is the definitive fix for:
- ✔ Complete no-start or intermittent starting problems.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Unexplained engine stalling or stumbling.
- ✔ False sensor codes or loss of communication with scan tools.
- ✔ Poor fuel economy and reduced engine performance.
Expert Pro Tip from a 20-Year Veteran Mechanic
Before you install your new PCM, take a moment to inspect the electrical connectors and wiring harness. On these 90s GM trucks, the PCM is often located in the engine bay where it’s exposed to heat and moisture. I’ve seen many cases where corrosion on the connector pins causes intermittent signal loss, mimicking a bad PCM. Clean both the male and female pins with a quality electronics cleaner and a small brush. This simple 5-minute step ensures a solid connection and can prevent future headaches.
Plug-and-Play Installation: No Dealer Visit Required
We make this repair as simple as possible. By programming the module to your VIN before shipping, we handle the most complex part of the job. You can install this at home with basic hand tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most compatible vehicles like the Escalade, Tahoe, and Suburban, the PCM is located in the engine compartment, typically on the driver’s side fender.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Then, unbolt the old PCM from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed PCM into place and securely reconnect the wiring harnesses. Ensure they click into place.
- Reconnect Battery: Re-attach the negative battery terminal. The vehicle is now ready to start.
Guaranteed Compatibility
This module is a direct replacement for a wide range of 1998-1999 GM trucks, vans, and SUVs. Please verify that your original module has one of the following service numbers printed on the label:
Interchangeable Part Numbers: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, 9366810
This part fits dozens of models, including the Chevrolet Silverado, Suburban, Tahoe, Express Van, GMC Sierra, Yukon, Savana Van, Cadillac Escalade, Oldsmobile Bravada, and more. Providing your VIN during checkout guarantees we send you a perfectly matched and correctly programmed computer for your exact vehicle configuration.