Is Your GM Truck or Van Running Rough?
If you’re dealing with mysterious engine problems like stalling, poor fuel economy, erratic shifting, or a persistent check engine light, the culprit is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it starts to fail, it can cause a cascade of frustrating and hard-to-diagnose issues across your entire vehicle.
From the Diagnostic Bay
We had a 2000 Chevy Express van come into the shop that had been to three other mechanics. The owner was chasing a random misfire (P0300) and an intermittent stalling issue that nobody could solve. They had replaced plugs, wires, the coil, and even the fuel pump. After hooking up our scanner and monitoring live data, we noticed the fuel trim and injector pulse width readings were wildly inconsistent. This pointed us directly to the PCM. We installed one of our VIN-programmed modules, performed the security relearn, and the van ran perfectly. The owner was thrilled to finally have a reliable work vehicle again after weeks of headaches. It’s a classic case of symptoms that seem to point everywhere but are rooted in the vehicle’s central computer.
The Direct Solution for Your Vehicle’s Brain
This Powertrain Control Module, service number 16265035, is the definitive solution to get your vehicle back on the road and running like it should. We take the guesswork and hassle out of the replacement process. Unlike a generic part from a local store, each module we ship is professionally programmed with the latest GM-certified software updates specifically for your vehicle’s VIN. This ensures optimal performance, fuel efficiency, and seamless communication with all other onboard modules. This is a true plug-and-play solution designed for reliability.
Symptoms of a Failing PCM
- ✔ Check Engine Light is on with various trouble codes
- ✔ Engine stalling or stumbling for no apparent reason
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A noticeable decrease in fuel mileage
- ✔ The vehicle fails to start, even with a good battery and starter
- ✔ Communication errors with diagnostic scan tools
Why Choose Our 1999-2001 Astro PCM?
Getting the right part is only half the battle; getting it correctly prepared for your vehicle is what truly matters. Our process ensures you receive a component that is ready for installation right out of the box. Simply provide us with your vehicle’s VIN during checkout, and our technicians will handle the critical programming. This saves you a costly trip to the dealership and eliminates the need for expensive specialty programming tools. This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940, and fits a wide range of Chevrolet, GMC, Isuzu, and Oldsmobile trucks and vans. Please verify the part number on your original module to ensure a perfect match.
Do I need to get this PCM programmed?
No. We program the module to the VIN you provide before shipping it to you. This ensures it has the correct software for your vehicle’s specific options and the latest updates from GM for optimal performance.
Is this a difficult part to install?
The physical installation is straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. However, after installation, you may need to perform a security relearn procedure (often called a CASE relearn or Passlock relearn) to sync the new PCM with your vehicle’s anti-theft system. This procedure can usually be done without special tools and instructions are widely available online.
How do I find the part number on my old module?
Your original PCM will have a sticker on it with several numbers. Look for the large print number, often labeled as the “Service No.” In this case, you would be looking for 16265035 or one of the other compatible part numbers listed in the description.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s crucial to properly diagnose the trouble codes first to ensure the problem isn’t with a sensor or another component that the PCM is simply reporting.
What is a VIN? Where can I find it?
VIN stands for Vehicle Identification Number. It is a unique 17-digit code for your specific vehicle. You can find it on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.