Is Your GM Truck or Van Running Rough? Let’s Get It Fixed.
If you’re dealing with a 1999-2000 GMC 3500, or a similar GM vehicle from that era, you know it’s a workhorse. But when the Powertrain Control Module (PCM) starts to fail, it can bring your entire operation to a halt. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a faulty PCM can create some of the most frustrating and hard-to-diagnose issues. You might be experiencing symptoms like a persistent check engine light, erratic transmission shifting, a sudden no-start condition, or the engine stalling for no apparent reason. These aren’t just annoyances; they’re signs that the brain of your engine is in trouble.
“A customer’s 2000 GMC 3500 came in on a flatbed last month. It would crank but never start, and their regular mechanic had already replaced the fuel pump and crank sensor. When I connected my scan tool, I couldn’t even communicate with the PCMโa dead giveaway. After verifying power and ground at the module connectors, it was clear the PCM itself had failed internally. We installed one of our pre-programmed modules, performed the security relearn, and the truck fired right up and ran perfectly. It saved the customer hundreds in diagnostic fees and got their work truck back on the job.”
The Right Solution: A Reliable, Pre-Programmed PCM
Don’t waste time and money chasing phantom issues or paying steep dealership fees for programming. This Powertrain Control Module is the definitive solution, arriving at your door ready for installation. We take the guesswork out of the repair by programming the module specifically for your vehicle using your VIN.
- โ VIN-Programmed for Your Vehicle: We flash the module with the latest, most stable software updates from General Motors, ensuring it’s a perfect match for your truck’s specific configuration.
- โ Solves Common Drivability Problems: Puts an end to issues like harsh shifting, poor fuel economy, engine stumbling, and false diagnostic trouble codes (DTCs) caused by a failing original unit.
- โ Direct-Fit Replacement: Engineered to be a direct replacement for a wide range of original equipment part numbers, ensuring a perfect physical and electronic fit.
- โ No Dealership Visit Required: By pre-programming the module, we eliminate the need for a costly trip to the dealer for software installation. The only step required post-installation is a simple security relearn procedure you can do yourself.
How It Works: The VIN Programming Process
Your vehicle’s VIN is like its fingerprint. It tells the PCM everything from the engine and transmission type to the axle ratio and tire size. After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this information to load the precise GM-certified calibration file onto the module. This ensures that once installed, the PCM communicates flawlessly with all other systems in your vehicle, restoring its original performance and efficiency.
Installation and Security Relearn
Physically installing the module is straightforward. It’s typically located in the engine compartment (check your specific model for the exact location). After disconnecting the battery and swapping the module, you will need to perform a security relearn procedure. This pairs the new PCM with your vehicle’s anti-theft system. It’s a simple process that usually involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. We include instructions to make this step easy.
Confirm Your Part Number
This module is a direct replacement for several original part numbers. To ensure compatibility, check the sticker on your current module. This unit replaces the following common part numbers: 16263494, 16265035, 8162634940, 218-11787, and 21811787.
Guaranteed Vehicle Compatibility
This module is confirmed to fit a wide array of GM vehicles. Please verify your specific model and year from the list below:
- โ Astro/Safari Van: 1999-2001 (ID 16263494)
- โ Blazer S10/Jimmy S15: 1998-2000
- โ Bravada: 1998-2000
- โ Chevrolet/GMC Pickups (1500/2500/3500): 1999-2000 (Gasoline Engines)
- โ Envoy: 1998-2000
- โ Escalade: 1999-2000
- โ Express/Savana Vans (1500/2500/3500): 1999-2002 (Gasoline Engines)
- โ Isuzu Hombre: 1998-2000 (4.3L)
- โ S10/S15/Sonoma Pickup: 1998-2000 (4.3L)
- โ Sierra/Silverado 1500: 1999-2000 (4.3L V6)
- โ Suburban (1500/2500): 1999 (Gasoline Engines)
- โ Tahoe/Yukon: 1999-2000