Is Your GM Truck or Van Running Rough?
If your Chevrolet Astro, Express, Silverado, or another compatible GM vehicle is experiencing perplexing issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition, the problem may lie with a faulty Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from the fuel injectors and spark plugs to the transmission shift points. When it fails, it can cause a cascade of problems that are often misdiagnosed, leading to wasted time and money on unnecessary parts.
This is a direct-fit replacement PCM, service number 16265035, for a wide range of GM trucks and vans. The best part? It arrives at your door fully programmed to your specific vehicle using your VIN. We install the latest GM-certified software updates, ensuring optimal performance, fuel efficiency, and emissions control. This eliminates the need for an expensive trip to the dealership for programming, making the repair process faster, simpler, and more affordable.
From the Diagnostic Bay
We had a 2000 Chevy Express 2500 come into the shop with a complaint of a harsh 1-2 shift and a check engine light for a transmission solenoid code. The owner had already replaced the solenoid twice with no change. After checking the wiring and finding no issues, we suspected the computer. The internal driver for that solenoid inside the original PCM had failed. We installed one of our pre-programmed modules, performed the quick security relearn, and the van shifted perfectly. The customer saved hundreds by avoiding a dealership visit and guessing on more parts.
Solving Issues with a 1999-2001 Astro PCM
The PCM in these late 90s and early 2000s GM vehicles is a known failure point. Age, heat cycles, and vibrations can cause internal components and solder joints to break down. This can manifest in a variety of ways, making diagnosis tricky. By replacing your old module with our correctly programmed unit, you are providing a solid foundation for your vehicle’s engine and transmission management systems, resolving these deep-seated electronic issues and restoring the reliability you depend on.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various codes
- ✔ Vehicle fails to start or starts intermittently
- ✔ Poor engine performance, hesitation, or stalling
- ✔ Decreased fuel mileage
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to communicate with a diagnostic scan tool
- ✔ Inaccurate gauge readings
Simple, VIN-Matched Programming
Getting the right part is only half the battle; it needs the right software to work. We take the guesswork out of the equation. After you place your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will use this information to load the precise factory software for your truck or van’s specific configuration, including engine, transmission, and emissions equipment. This ensures a seamless installation and proper function right out of the box. This unit is a reliable solution for your 1999-2001 Astro PCM and many other compatible vehicles.
This module is a direct replacement for several part numbers, including: 16263494, 16265035, 8162634940, 218-11787, and 21811787. Please verify your part number or consult the extensive fitment list to ensure compatibility.
Frequently Asked Questions
Do I need to have this module programmed?
No. This PCM comes fully pre-programmed to your vehicle’s VIN before we ship it. It is ready for installation upon arrival. You will need to provide your VIN to us after purchase.
Is any special procedure needed after installation?
In many cases, you may need to perform a security relearn procedure, also known as a CASE (Crankshaft Angle Sensor Error) relearn. This can often be done without special tools and involves a series of key cycles. Instructions are widely available online for your specific model, or your mechanic can perform it quickly.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Is this a new or used part?
This is a professionally serviced, original equipment part that has been tested and verified to meet or exceed factory specifications. It is loaded with new, updated software specific to your vehicle.
Will this fix my vehicle’s problem for sure?
While this PCM resolves the vast majority of issues listed, it’s essential to ensure your vehicle has been properly diagnosed. This part will not fix problems related to faulty wiring, sensors, or other mechanical components. We recommend a thorough diagnosis by a qualified technician if you are unsure.