Restore Your Truck’s Brain and Get Back on the Road
Is your late-90s GM truck or SUV giving you headaches? If you’re dealing with a persistent Check Engine Light, rough idling, poor fuel economy, or even a frustrating no-start condition, the problem often traces back to a failing Powertrain Control Module (PCM). As a technician with over two decades of experience under the hood, I’ve seen how a faulty PCM can mimic a dozen other issues, leading to wasted time and money on unnecessary parts. This isn’t just a component; it’s the central computer managing your engine’s performance, fuel delivery, and transmission shifting. When it fails, your vehicle’s reliability fails with it.
This replacement 1999 Escalade Powertrain Control Module is the definitive solution to get your vehicle running like it should. We take the guesswork and hassle out of the repair by pre-programming the module to your vehicle’s specific Vehicle Identification Number (VIN). This means no expensive trips to the dealership for flashing or programming. It arrives at your door ready for a straightforward installation, loaded with the latest GM software updates to ensure optimal performance and efficiency.
A Technician’s Notebook: The Intermittent Stall on the ’99 Tahoe
I remember a 1999 Chevy Tahoe that came into my bay with a problem that was driving the owner crazy. It would run perfectly for days, then suddenly stall at a red light and refuse to restart for 20 minutes. There were no consistent trouble codes, just a history of random misfires. The owner had already replaced the fuel pump and ignition coil. After checking all the wiring and grounds, I hooked up my scope to monitor the PCM’s outputs. Sure enough, during one of its episodes, I saw the injector pulse signals drop out completely. The internal processors of the original PCM were failing under heat soak. We installed a VIN-programmed module just like this one, and the Tahoe never stalled again. It’s a classic failure mode for these older units, and a direct replacement is the only reliable fix.
Is Your Vehicle Showing These Symptoms?
A failing PCM can cause a wide range of issues. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention:
- âś” Unexplained Check Engine Light (CEL) illumination
- âś” Stored diagnostic trouble codes (DTCs) like P0601, P0604, or P0606 pointing to internal module failure
- âś” Engine stalling, stumbling, or hesitating during acceleration
- âś” Noticeable decrease in fuel mileage
- âś” Harsh or erratic automatic transmission shifting
- âś” The vehicle cranks but refuses to start
- âś” Communication errors with diagnostic scan tools
A Straightforward Guide to Installation
This is a job most DIY enthusiasts can handle in their own driveway with basic hand tools. Our VIN-programming service makes it a true plug-and-play repair.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10 minutes for the system to discharge completely.
- Locate the PCM: On most of these GM trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side inner fender or near the battery.
- Disconnect the Connectors: Carefully unclip and remove the large electrical harness connectors from the old module. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. It’s usually held in by a few bolts or nuts.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely fasten it.
- Reconnect Everything: Plug the electrical connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: Some vehicles may require a security relearn procedure, which typically involves cycling the key. Your vehicle’s service manual will have the specific, simple steps if needed.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 09355699, 16250279, and 09366810. It is guaranteed to fit the following vehicles with the specified options. Please verify your original part number or contact us with your VIN to ensure compatibility.
ESCALADE 99 (LH front engine comp.) ID 16250279
Chevrolet:
ASTRO 98-99 (LH front by battery) ID 16250279
BLAZER S10 98 (RH front engine comp.) w/o build date opt ZN4; ID 16250279 or 16258815
PICKUP 1500/2500/3500 98-99 (Gasoline, LH engine comp.) ID 16250279
EXPRESS VAN 1500/2500/3500 98 (Gasoline) ID 16250279
SUBURBAN 1500/2500 98-99 (Gasoline, LH engine comp.) ID 16250279
TAHOE 98-99 (Gasoline, LH engine comp.) ID 16250279
GMC:
ENVOY 98 (RH front engine comp.) w/o build date opt ZN4; ID 16250279 or 16258815
JIMMY S15 98 (RH front engine comp.) w/o build date opt ZN4; ID 16250279 or 16258815
PICKUP 1500/2500/3500 98-99 (Gasoline, LH engine comp.) ID 16250279
SAFARI 98-99 (LH front by battery) ID 16250279
SAVANA VAN 1500/2500/3500 98 (Gasoline) ID 16250279
SONOMA S15 98 (4.3L) w/o build date opt ZN4; ID 16250279 or 16258815
YUKON 98-99 (LH engine comp.) ID 16250279
Oldsmobile:
BRAVADA 98 (4.3L) w/o build date opt ZN4; ID 16250279 or 16258815
Isuzu:
HOMBRE 98 (4.3L) w/o extended build date opt ZN4; ID 16250279 or 16258815
Frequently Asked Questions
What is VIN programming and why is it important?
VIN programming is the process of loading your vehicle’s specific software and settings into the PCM using your 17-digit Vehicle Identification Number. This ensures the module communicates correctly with your engine, transmission, and security system. It’s what makes this a direct, plug-and-play replacement without needing a dealer visit.
How do I provide my VIN after purchase?
After you complete your purchase, you will receive an email with instructions on how to send us your VIN. You can also add it to the ‘notes’ section during checkout. We cannot ship your module until we receive your VIN to perform the programming.
Will I need to perform any additional procedures after installation?
In most cases, no. The module is programmed to be ready to go. Some GM vehicles may require a simple security relearn procedure (often called a CASE relearn or Passlock relearn) which can typically be done without special tools by cycling the ignition key. Your service manual will have the exact steps if needed for your specific model.
How can I be sure this part number will fit my vehicle?
The best way is to check the part number on your original module. This PCM replaces part numbers 09355699, 16250279, and 09366810. You can also use our detailed compatibility list or send us your VIN, and we will happily verify the correct fitment for you.