Restore Peak Performance to Your GM Truck or SUV
Is your 1999 Cadillac Escalade, Tahoe, or Suburban running rough, stalling unexpectedly, or throwing confusing check engine light codes? Before you start replacing expensive sensors or worrying about a major engine issue, the problem might be simpler: a failing Powertrain Control Module (PCM). As the electronic brain of your vehicle, a faulty PCM can cause a cascade of problems that are frustrating to diagnose. This is a reliable, tested, and VIN-programmed solution designed to get your truck back on the road with confidence.
We take the guesswork and high costs out of the equation. This isn’t just a used part pulled from a yard; it’s a complete service. Upon purchase, you provide us with your vehicle’s VIN. We then flash this PCM with the latest official GM software updates specific to your truck’s configuration. This ensures perfect communication between your engine, transmission, and other systems, restoring the smooth operation and fuel efficiency you expect. This is the most direct and effective way to solve complex electronic issues without paying steep dealership programming fees.
Is Your Truck Showing These Signs of PCM Failure?
- âś” Persistent Check Engine Light (CEL) with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- âś” The engine cranks but refuses to start.
- âś” Unexplained stalling, especially when coming to a stop or at idle.
- âś” Noticeably poor fuel economy.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Failure to pass an emissions or smog test.
- âś” Your scan tool cannot communicate with the computer.
From the Diagnostic Bay: The Case of the Phantom Misfire
A customer brought in his ’99 Yukon, frustrated after spending hundreds on new spark plugs, wires, and even a distributor to fix a random misfire and stalling problem. His local shop was stumped. When I hooked up my professional scan tool, I noticed the data stream from the PCM would freeze and drop out intermittently. There were no hard codes, just chaos. This is a classic sign of a failing processor inside the PCM. We installed one of our VIN-programmed modules, performed the quick security relearn, and the truck ran perfectly. He could have saved a lot of time and money by addressing the vehicle’s computer first.
Your Straightforward PCM Installation Guide
Installing your pre-programmed 1999 Escalade PCM is a job most DIYers can handle in under an hour. No complex wiring is required.
- 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 compatible models like the Escalade, Tahoe, and pickups, the PCM is located in the engine compartment, typically on the driver’s side near the fender or firewall. It’s a silver metal box with several large multi-pin connectors.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed PCM into the mounting bracket. Firmly reconnect the electrical harnesses, ensuring each one clicks securely into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: This is a critical final step. Turn the key to the ‘ON’ position (without starting the engine) for 10-15 minutes. The ‘Security’ light on the dash should turn off. Turn the key ‘OFF’ for 10 seconds, then repeat the process two more times. After the third cycle, the vehicle will be synchronized with the new PCM and should start normally.
Verified Fitment for Your GM Truck or Van
This Powertrain Control Module is a direct replacement for units with service part numbers 16250279, 09355699, 16266645, 9355699, 16258815, 09366810, or 9366810. It is compatible with a wide range of 1998 and 1999 General Motors vehicles. Please verify your original part number or consult our full fitment list. Key compatible models include:
- âś” 1999 Cadillac Escalade
- âś” 1998-1999 Chevrolet Tahoe & GMC Yukon
- âś” 1998-1999 Chevrolet & GMC Suburban (1500/2500)
- âś” 1998-1999 Chevrolet & GMC C/K Pickups (1500/2500/3500)
- âś” 1998-1999 Chevrolet Express & GMC Savana Vans (1500/2500/3500)
- âś” 1998 Chevrolet S10 Blazer, GMC S15 Jimmy, Oldsmobile Bravada
- âś” …and many more.
What exactly is VIN programming?
What exactly is VIN programming?
VIN programming, or flashing, is the process of loading your vehicle’s specific software onto the PCM. This includes information about your engine size, transmission type, emissions equipment, and other options. We use your Vehicle Identification Number (VIN) to ensure the module we send you has the exact, correct software from GM, making it ready for installation.
Do I need to take my truck to a dealer after installing this?
No. Because we program the module to your VIN before shipping, you do not need a trip to the dealer for programming. You will only need to perform the simple security relearn procedure detailed in our installation guide, which requires no special tools.
Is this a new part?
This is a high-quality, tested used PCM sourced from a salvaged vehicle. Each unit is inspected and verified to be fully functional before being programmed and shipped. This provides a reliable, cost-effective solution compared to a new module.
How do I find my original part number?
The part number is printed on a sticker on the case of your current PCM. You will need to locate and likely remove the module to see it clearly. Matching the part number is the best way to guarantee compatibility, though our VIN programming handles most variations.
Will this fix my transmission problems?
In many cases, yes. The PCM controls the transmission’s shift points and line pressure. If your transmission issues are electronic in nature (e.g., erratic shifting, getting stuck in one gear) and not caused by an internal mechanical failure, a new PCM is often the correct fix.