Restore Peak Performance to Your GM Truck or SUV
Is your 1999 Cadillac Escalade or another trusted GM vehicle suddenly giving you headaches? If you’re dealing with a persistent Check Engine Light, rough idling, stalling, or a frustrating no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM manages everything from fuel mixture and ignition timing to transmission shifting. When it falters, the entire vehicle’s performance suffers. This isn’t just an annoyance; it can affect fuel economy, emissions, and overall drivability.
This listing offers a reliable, cost-effective solution: a thoroughly tested, used OEM PCM that is professionally programmed with the latest GM software updates specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and we’ll handle the programming before it ships. This crucial step ensures that the module communicates perfectly with your vehicle’s systems, saving you a costly trip to the dealership for programming services. Get your truck or van back to running the way it was designed to.
A Technician’s Notebook
I remember a 1999 GMC Yukon that came into the shop with a classic intermittent no-start. The owner had already replaced the battery and starter to no avail. On my scan tool, I was getting communication loss errors with the PCM. After checking the power and ground circuits to the module, which were solid, I knew the internal logic of the PCM was failing. These older units are prone to heat-related solder joint fractures. We installed a VIN-programmed module just like this one, performed the quick security relearn, and the truck fired up instantly. It’s a fix I’ve done hundreds of times, and it brings these reliable vehicles right back to life.
Common Signs of a Failing PCM
- âś” Check Engine Light is illuminated with communication-related or internal processor fault codes (e.g., P0601, P0605).
- âś” Your vehicle fails to start or stalls unexpectedly while driving.
- âś” Noticeable decrease in fuel efficiency.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Engine misfires, runs rough, or hesitates on acceleration.
- âś” Failure to pass state emissions testing.
A Straightforward Guide to Installation
Replacing the PCM in these GM vehicles is a job most DIYers can handle with basic tools. This programmed 1999 Escalade PCM makes the process even simpler.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most of these trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side fender or near the battery.
- Disconnect the Harnesses: Carefully unclip and remove the electrical wiring harnesses connected to the old PCM. The connectors have locking tabs that need to be released.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely reconnect the wiring harnesses. Ensure they click into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: You will likely need to perform a simple security relearn procedure (often called a CASE relearn or Passlock relearn). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating a few times. This allows the vehicle’s security system to recognize the new PCM.
Verified Vehicle Compatibility
This module is a direct replacement for service number 09366810 and interchanges with part numbers 09355699, 16266645, 16250279, and 16258815. It is confirmed to fit the following vehicles with the specified options:
- ASTRO 98: Electronic Control Module; (LH front by battery), ID 9355699
- BLAZER S10/JIMMY S15 98: Electronic Control Module; (RH front engine compartment), w/o build date opt ZN4; ID 9355699
- BRAVADA 98: Electronic Control Module; (6-262, 4.3L), w/o build date opt ZN4; ID 9355699
- CHEVROLET 1500 PICKUP 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- CHEVROLET 2500 PICKUP 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- CHEVROLET 3500 PICKUP 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- ENVOY 98: Electronic Control Module; (RH front engine compartment), w/o build date opt ZN4; ID 9355699
- ESCALADE 99: Electronic Control Module; (LH front engine compartment), ID 9355699
- EXPRESS 1500 VAN 98-99: Electronic Control Module; ID 9355699
- EXPRESS 2500 VAN 98-99: Electronic Control Module; gasoline, ID 9355699
- EXPRESS 3500 VAN 98-99: Electronic Control Module; gasoline, ID 9355699
- GMC 1500 PICKUP 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- GMC 2500 PICKUP 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- GMC 3500 PICKUP 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- ISUZU HOMBRE 98: Electronic Control Module; 4.3L (6 cylinder), w/o extended build date opt ZN4; ID 9355699
- S10/S15/SONOMA 98: Electronic Control Module; 6-262 (4.3L), w/o build date opt ZN4; ID 9355699
- SAFARI (GMC) 98: Electronic Control Module; (LH front by battery), ID 9355699
- SAVANA 1500 VAN 98-99: Electronic Control Module; ID 9355699
- SAVANA 2500 VAN 98-99: Electronic Control Module; gasoline, ID 9355699
- SAVANA 3500 VAN 98-99: Electronic Control Module; gasoline, ID 9355699
- SUBURBAN 1500 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- SUBURBAN 2500 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- TAHOE 98-99: Electronic Control Module; gasoline (LH front engine compartment), ID 9355699
- YUKON 98-99: Electronic Control Module; (LH engine compartment), ID 9355699
Choosing this tested and correctly programmed 1999 Escalade PCM is the smart way to solve complex electronic issues and get your vehicle running reliably again.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the PCM with the exact software and calibrations for your specific vehicle. This includes engine size, transmission type, and other factory options. This step ensures the module works correctly right out of the box.
Is this a new part?
No, this is a genuine OEM part that has been sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped. This provides OEM reliability at a significant cost saving compared to a new dealer part.
Will I need to do anything else after installation?
After installing the PCM, you will need to perform a security relearn procedure. This is a simple process that syncs the new PCM with your vehicle’s anti-theft system and can typically be done without special tools. Instructions are widely available online for your specific model, or a local mechanic can perform it quickly.
How do I find my part number to confirm a match?
The part number is printed on a sticker on your original PCM. While this module (09366810) fits a wide range of vehicles listed, matching the ID (often 09355699) or one of the interchange numbers is the best way to guarantee compatibility. If you’re unsure, just send us your VIN and we can verify fitment for you.