Restore Peak Performance to Your GM Truck or Van
Is your Chevrolet S10, Silverado, or GMC Savana suffering from frustrating issues like a persistent check engine light, poor fuel economy, rough idling, or even a no-start condition? These are common signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission performance. Don’t let a faulty module keep you off the road. This direct-fit PCM, service number 16265035, is the definitive solution to restore your vehicle’s reliability and drivability.
The Brain of Your Operation: Why a Healthy PCM is Crucial
The PCM is arguably one of the most critical components in your modern vehicle. It continuously analyzes data from dozens of sensors throughout the engine and drivetrain. It uses this information to make real-time adjustments to the fuel mixture, ignition timing, transmission shift points, and emissions systems. When it begins to fail, the symptoms can be widespread and difficult to diagnose, often mimicking other part failures. Replacing a faulty module with a properly functioning, correctly programmed unit is essential for a smooth, efficient, and reliable driving experience.
From the Diagnostic Bay
We once had a 1999 GMC Sierra in the shop that had its owner chasing ghosts for weeks. The truck had a rough idle and would intermittently stall at stoplights. The owner had already replaced the spark plugs, wires, IAC valve, and even the fuel pump based on various forum suggestions. When it finally came to us, a quick scan showed no hard codes, but live data revealed erratic fuel trim adjustments. Instead of throwing more parts at it, we tested the PCM’s driver circuits and found intermittent failures. After installing a VIN-programmed GM PCM 16265035, the truck ran like it just rolled off the assembly line. It’s a classic case of treating the disease, not just the symptoms.
Is Your Vehicle Showing Signs of PCM Failure?
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel mileage.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
Plug & Play Solution: The Advantage of VIN Programming
The biggest hurdle in replacing a PCM is the complex programming required to make it communicate with your specific vehicle. This module eliminates that problem. Before we ship your part, our technicians will flash it with the latest GM-certified software updates using the unique Vehicle Identification Number (VIN) you provide. This ensures that the module is perfectly matched to your vehicle’s factory specifications, including engine size, transmission type, and emissions equipment. For most applications, this makes installation a simple plug-and-play process, getting you back on the road without a costly trip to the dealership.
This unit is a direct replacement for multiple service numbers, including 16263494, 16265035, 8162634940, 218-11787, and 21811787. Please verify the part number on your original module and consult the detailed fitment list to ensure perfect compatibility.
Frequently Asked Questions
Do I need to program this module?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the correct software for your specific vehicle.
Where can I find my VIN?
Your VIN can be found on a metal tag on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, this part will resolve the issue. However, it’s crucial to have the trouble codes professionally diagnosed to ensure the PCM is the root cause and not another failing sensor or component.
Is any additional setup required after installation?
In some GM vehicles, a security relearn procedure (Passlock/VATS) or a Crankshaft Position Sensor Variation (CASE) relearn may be necessary after installation. These are simple procedures that can be performed with a capable scan tool or by following specific instructions for your vehicle.
How do I confirm this part fits my vehicle?
The best method is to match the service number on your current PCM to one of the compatible numbers listed (16265035, 16263494, etc.). You can also use the detailed fitment list on this page to confirm compatibility with your year, make, and model.