Restore Peak Performance to Your GM Truck or Van
If you’re dealing with a frustrating check engine light, rough idle, stalling, or unpredictable engine behavior in your GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As a mechanic with over two decades of experience under the hood, I’ve seen countless drivers chase expensive sensor and component replacements when the vehicle’s ‘brain’ was the root cause all along. This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s factory performance and reliability.
This module, part number 218-11787, is the central command unit for your engine and transmission. It controls everything from fuel mixture and ignition timing to shift points and emissions. When it fails, the symptoms can be widespread and confusing. We take the guesswork out of the repair by providing a high-quality PCM that is professionally programmed with the latest GM software updates specifically for your vehicle. Simply provide your Vehicle Identification Number (VIN) after purchase, and we’ll handle the complex programming before it even ships. This means no extra trips to the dealership and no expensive programming fees.
Case Study: The Ghost in the Machine
A customer brought in his 2000 Chevy Tahoe, a classic body style very similar to the Suburban. The complaint was an intermittent no-start and a random stalling issue that no other shop could solve. They had replaced the fuel pump, crank sensor, and ignition coil. When I hooked up my scanner, I found communication error codes alongside a P0601 (Internal Control Module Memory Check Sum Error). While other components can cause no-starts, the P0601 code pointed directly to an internal failure in the computer itself. We installed a VIN-programmed 1999 Suburban 1500 PCM (the compatible part for his vehicle), performed the quick security relearn, and the truck fired up instantly. The ghost was gone. This is a perfect example of how replacing the right part the first time saves hundreds in wasted diagnostics and parts.
Is Your GM Truck Showing These Signs?
A failing PCM can manifest in various ways. If your vehicle is experiencing any of the following, this module is the likely solution.
- ✔ Unexplained Check Engine Light (with codes like P0601, P0602, P0606)
- ✔ Engine stalling or shutting off while driving
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A complete no-start condition where the engine cranks but won’t fire
- ✔ Noticeable decrease in fuel economy
- ✔ Failure to pass an emissions or smog test
- ✔ Intermittent electrical issues that seem to have no source
A Straightforward Guide to Installation
Replacing the PCM on these GM models is a job most DIYers can handle with basic hand tools. Our pre-programmed module makes it even simpler.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: On most trucks and SUVs like the Suburban, Tahoe, and pickups, the PCM is located in the engine compartment on the driver’s side, often near the fender or firewall. On Express and Savana vans, it’s typically in the LH rear of the engine compartment.
- Disconnect the Connectors: Carefully unclip and remove the electrical wiring harnesses from the old PCM. These connectors are color-coded to prevent mix-ups.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. There are typically two or three bolts holding it in place.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely fasten the bolts.
- Reconnect Everything: Plug the wiring harnesses back into the new PCM, ensuring they click securely into place. Reconnect the negative battery terminal.
- Perform Security Relearn: You may need to perform a simple security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. This allows the new PCM to sync with your vehicle’s anti-theft system. Instructions are readily available online for your specific model.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 16263494, 16265035, and 8162634940. It is guaranteed to fit a wide range of GM vehicles. Please verify your vehicle is on this list and, if noted, that the ID number on your current module matches.
CHEVROLET 2500 PICKUP 99-00 Electronic Control Module; gasoline, ID 16263494
CHEVROLET 3500 PICKUP 99-00 Electronic Control Module; gasoline, ID 16263494
SUBURBAN 1500 99 Electronic Control Module; gasoline, ID 16263494
SUBURBAN 2500 99 Electronic Control Module; gasoline, ID 16263494
TAHOE 99-00 Electronic Control Module; gasoline, ID 16263494
ASTRO 99-01 Electronic Control Module; ID 16263494
BLAZER S10 98-00 Electronic Control Module; (RH front engine compartment)
S10 PICKUP 98-00 Electronic Control Module; 4.3L
EXPRESS/SAVANA 1500/2500/3500 99-02 Electronic Control Module; gasoline, ID 16263494
GMC 1500 PICKUP 99 Electronic Control Module; 5.0L/5.7L, ID 16263494
GMC 2500 PICKUP 99-00 Electronic Control Module; gasoline, ID 16263494
GMC 3500 PICKUP 99-00 Electronic Control Module; gasoline, ID 16263494
SIERRA 1500 PICKUP 99-00 Electronic Control Module; 6 cylinder
SILVERADO 1500 PICKUP 99-00 Electronic Control Module; 6 cylinder
YUKON 99-00 Electronic Control Module; ID 16263494
SAFARI (GMC) 99-01 Electronic Control Module; ID 16263494
JIMMY S15 98-00 Electronic Control Module; (RH front engine compartment)
SONOMA 98-00 Electronic Control Module; 4.3L
BRAVADA 98-00 Electronic Control Module
ENVOY 98-00 Electronic Control Module
ESCALADE 99-00 Electronic Control Module; ID 16263494
ISUZU HOMBRE 98-00 Electronic Control Module; 4.3L
… and more. Please check the detailed fitment data to confirm.
Frequently Asked Questions
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It manages the engine and transmission functions to ensure optimal performance, fuel efficiency, and emissions control.
Do I need to get this module programmed?
No. We program the module to your vehicle’s specific VIN before we ship it to you. It arrives ready for installation, saving you a trip to the dealer.
What is a ‘CASE Relearn’ and is it required?
A Crankshaft Variation Relearn (CASE Relearn) synchronizes the new PCM with your engine’s crankshaft position sensor. While not always mandatory for the vehicle to run, it is highly recommended to clear certain trouble codes (like P1336) and ensure accurate misfire detection. Most professional scan tools can perform this procedure in a few minutes.
How do I find my part number to ensure compatibility?
Your original PCM will have a sticker on it with the service number. For these GM vehicles, it will typically be a number like 16263494. Matching this number ensures you are ordering the correct hardware for your vehicle.
What information do you need from me after purchase?
After you place your order, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). This allows us to load the correct, updated software for your exact vehicle configuration.