Is Your GM Truck or Van Acting Up? It Could Be The PCM.
If you’re dealing with frustrating issues like random stalling, a no-start condition that has you stumped, or a Check Engine Light that won’t go away, the Powertrain Control Module (PCM) is often the culprit. As the brain of your vehicle’s engine and transmission, when it fails, it can cause a wide range of baffling problems. I’ve spent over two decades diagnosing these exact vehicles, and I’ve seen firsthand how a faulty PCM can mimic a dozen other failed parts.
A Story From The Shop: The Ghost in the 2000 Express Van
Just last month, a contractor brought in his 2000 Chevrolet Express 2500 work van. The complaint was intermittent stalling. He’d be driving along, and the engine would just cut out. It wouldn’t restart for at least 20-30 minutes. He had already replaced the fuel pump and the ignition control module, spending hundreds with no fix. When we got it in the bay, I connected my scan tool. Everything looked normal. I let the van run for about 45 minutes until it was fully heat-soaked, and sure enough, it stalled. When I tried to re-establish communication with the scan tool, the PCM was offline. This is a classic sign of internal circuit board failure in these modules, often triggered by heat and years of vibration. The PCM was the problem all along.
Your Permanent Solution: A VIN-Programmed PCM
Don’t keep throwing parts at your vehicle. This Powertrain Control Module is the reliable, direct-fit solution for your GM truck or van. The biggest advantage we offer is our professional programming service. Before we ship the module, we use the Vehicle Identification Number (VIN) you provide to flash it with the latest, most stable software directly from GM. This isn’t a generic file; it’s the specific calibration for your vehicle’s engine, transmission, and options.
- ✔ No Dealer Visit Required: This module arrives ready to install. No expensive programming or key relearning fees at the dealership.
- ✔ Solves Common Problems: A direct fix for no-start, stalling, poor performance, harsh shifting, and false sensor codes.
- ✔ Latest GM Software: We load the newest updates, which can resolve factory drivability issues you might not even know you have.
- ✔ Plug & Play Installation: The physical swap is straightforward. Just disconnect the battery, remove the old module, and plug this one in.
Common Symptoms of a Failing GM PCM
If your vehicle is experiencing any of the following, a failing PCM is a very likely cause:
- ✔ The engine cranks but will not start.
- ✔ Intermittent stalling, especially after the engine has warmed up.
- ✔ The transmission is shifting erratically or getting stuck in one gear (limp mode).
- ✔ A persistent Check Engine Light, especially with communication codes (U-series) or internal processor codes (P0601-P0606).
- ✔ Noticeable decrease in fuel mileage and engine power.
- ✔ The anti-theft or security light stays on, preventing the engine from starting.
Installation Note: CASE Relearn Procedure
After installing the new PCM, we highly recommend performing a Crankshaft Variation (CASE) Relearn procedure. This synchronizes the new module with your engine’s crankshaft position sensor. While the vehicle will typically run without it, not performing the relearn may leave a P1336 trouble code stored and the Check Engine Light on. Most professional-grade scan tools can perform this procedure in a few minutes.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787. It fits a massive range of GM vehicles. To ensure 100% compatibility, please provide your VIN when you place your order. We will verify the fitment before programming and shipping.
This part is confirmed to fit select models of:
- ✔ Chevrolet Express / GMC Savana (1500, 2500, 3500)
- ✔ Chevrolet Silverado / GMC Sierra (1500, 2500, 3500)
- ✔ Chevrolet S10 / GMC Sonoma
- ✔ Chevrolet Blazer / GMC Jimmy
- ✔ Chevrolet Astro / GMC Safari
- ✔ Chevrolet Tahoe / GMC Yukon
- ✔ Cadillac Escalade
- ✔ Oldsmobile Bravada
- ✔ Isuzu Hombre
Please use the detailed fitment list and your original part number to confirm compatibility. When in doubt, send us your VIN!