Is Your GM Truck or Van Running Rough?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer of your vehicle’s engine and transmission. It manages everything from fuel mixture and ignition timing to transmission shift points and emissions controls. When it begins to fail, it can cause a wide range of frustrating and difficult-to-diagnose issues, leaving your reliable workhorse feeling unpredictable and unsafe. If you’re experiencing stalling, poor fuel economy, a persistent check engine light, or erratic shifting, a failing PCM is a likely culprit.
The Plug-and-Play Solution for Your 1999-2002 Savana 1500 PCM
Don’t let a faulty computer keep your vehicle off the road. This replacement Powertrain Control Module is the definitive solution for a wide array of GM trucks and vans from 1998 to 2002. The most significant benefit of this module is that it arrives at your door completely programmed to your vehicle’s specific Vehicle Identification Number (VIN). We flash it with the latest official GM software updates, ensuring optimal performance and compatibility right out of the box. This process eliminates the need for an expensive trip to the dealership for programming, saving you time and money.
From the Diagnostic Bay
I once had a 2001 Express van come in that was driving the owner crazy. He had replaced the O2 sensors, the crankshaft position sensor, and the throttle position sensor trying to fix a random stalling issue and a check engine light that wouldn’t stay off. After scanning the vehicle, I noticed some erratic voltage readings coming from the 5-volt reference circuit, which powers most of the engine sensors. Instead of chasing more sensors, we tested the source: the PCM. It turned out the module had an internal short that was not only causing the primary issue but was also damaging the new sensors he was installing. We installed a VIN-programmed PCM, performed the security relearn, and the van ran perfectly. It’s a classic case of treating the disease, not just the symptoms.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light: Often with internal module error codes (P0601-P0606).
- ✔ Engine Stalling: The engine may stall intermittently or fail to start at all.
- ✔ Rough Idle & Misfires: Inconsistent engine performance and shaking.
- ✔ Poor Fuel Economy: The engine runs inefficiently, consuming more fuel than usual.
- ✔ Erratic Transmission Shifting: Harsh shifts, delayed engagement, or getting stuck in gear.
- ✔ No Communication: A scan tool may be unable to communicate with the PCM.
This module is a direct replacement for multiple part numbers, including 16263494, 16265035, and 8162634940. By providing your VIN during checkout, you ensure that you receive a component that is perfectly matched to your vehicle’s factory specifications and options. Installation is straightforward for anyone with basic mechanical skills, though a security relearn procedure is typically required, which can be done without special tools. Restore the reliability and performance of your vehicle with this dependable, pre-programmed PCM.
Frequently Asked Questions
Do I need to have this module programmed?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN when you place your order, and the module will arrive ready for installation.
What is the security relearn procedure?
Most GM vehicles of this era require a security relearn (also known as a CASE relearn) to sync the new PCM with your vehicle’s anti-theft system. This procedure typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating this cycle three times. Specific instructions for your vehicle can be easily found online or in a service manual.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM (e.g., codes P0601, P0605), then this replacement module will resolve the issue. However, if the light is on due to other failing sensors or components, those issues will need to be addressed separately.
Is this a simple DIY installation?
Yes, for most individuals with basic tools. The PCM is typically located in the engine bay. The process involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in the reverse order. The final step is the security relearn procedure.
How 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 plate on the driver’s side dashboard visible through the windshield.