Restore Peak Performance to Your GM Truck or Van
Is your Chevrolet Express or GMC Savana van running rough, stalling, or refusing to start? Are you battling a persistent Check Engine Light and frustrating diagnostic codes? You’re not just dealing with an annoyance; you’re losing reliability and performance. The Powertrain Control Module (PCM), the electronic brain of your vehicle, is often the culprit. This direct-fit replacement 1999-2002 Express Van PCM is the definitive solution to get your workhorse back on the job, running smoothly and efficiently.
Unlike generic modules that leave you stranded, we take the guesswork and hassle out of the repair. Before this module ever leaves our facility, we program it with the latest official GM software updates, specifically matched to your vehicle’s unique VIN. This means no expensive trips to the dealership for programming and no need for specialized scan tools. It arrives at your door ready for a straightforward installation, restoring factory communication between your engine and transmission for optimal performance and fuel economy.
A Technician’s Notebook: The Intermittent No-Start
I had a 2001 Savana 2500 work van in my bay that was a real head-scratcher. The owner said it would randomly fail to start, but only after it was hot. No check engine light, no stored codes. We checked fuel pressure, spark, and battery—all perfect. On a hunch, I monitored the PCM data stream during a hot soak. Sure enough, after 20 minutes, the 5-volt reference signal to the sensors would drop out completely. The PCM’s internal voltage regulator was failing under heat. We installed one of these VIN-programmed modules, and the van has been starting reliably for its owner ever since. It’s a classic example of how heat and age can cause internal PCM failure that standard diagnostics might miss.
Is Your Van or Truck Showing These Signs?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs attention:
- ✔ Check Engine Light is on with codes like P0601 (Internal Memory Error) or P0606 (PCM Processor Fault)
- ✔ Vehicle fails to start or has intermittent starting problems
- ✔ Rough or unstable idling
- ✔ Noticeable decrease in fuel efficiency
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Engine stalling or misfiring for no apparent reason
- ✔ Failure to pass an emissions test
A Straightforward Guide to Installation
Installing your new 1999-2002 Express Van PCM is a manageable job for a DIYer with basic tools. Follow these steps carefully to ensure a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow the system to fully discharge.
- Locate the Module: On most Express and Savana vans, the PCM is located in the engine compartment on the left-hand (driver’s) side, near the rear. On pickups and SUVs, it’s typically on the driver’s side fender or near the battery.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Avoid pulling on the wires themselves. There are typically multiple color-coded connectors.
- Remove the Old PCM: Unbolt the mounting hardware that secures the old module to its bracket or the vehicle body. Set the old module aside.
- Install the New PCM: Mount your new, pre-programmed module in the same location, securing it with the original hardware.
- Reconnect Everything: Firmly plug the electrical connectors back into the corresponding sockets on the new PCM. You should hear a click as they lock into place. Reconnect the negative battery terminal.
- Final Steps: In some cases, a security relearn procedure may be necessary. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your vehicle’s service manual for specific instructions. Start the engine and let it idle to confirm the repair.
Verified Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, and 218-11787. It is guaranteed to fit a wide range of GM trucks, vans, and SUVs. Please verify your vehicle is on the list below. Providing your VIN at checkout ensures we send the correctly programmed unit for your specific application.
CHEVROLET 2500 PICKUP 99-00
CHEVROLET 3500 PICKUP 99-00
EXPRESS 1500 VAN 99-02
EXPRESS 2500 VAN 99-02
EXPRESS 3500 VAN 99-02
ASTRO 99-01
BLAZER S10 98-00
S10/S15/SONOMA 98-00
SILVERADO 1500 PICKUP 99-00
SUBURBAN 1500/2500 99
TAHOE 99-00
GMC 1500 PICKUP 99
GMC 2500 PICKUP 99-00
GMC 3500 PICKUP 99-00
SAVANA 1500 VAN 99-02
SAVANA 2500 VAN 99-02
SAVANA 3500 VAN 99-02
SAFARI (GMC) 99-01
SIERRA 1500 PICKUP 99-00
YUKON 99-00
JIMMY S15 98-00
CADILLAC ESCALADE 99-00
OLDSMOBILE BRAVADA 98-00
ISUZU HOMBRE 98-00
ENVOY 98-00
Choosing this pre-programmed 1999-2002 Express Van PCM is the most reliable and cost-effective way to solve complex electronic issues and restore your vehicle’s dependability. Don’t let a faulty computer keep you off the road—order today and get a solution that works right out of the box.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls the engine’s fuel injection, ignition timing, and the transmission’s shift points to ensure optimal performance, fuel economy, and emissions.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations specific to your vehicle’s engine, transmission, and options. This ensures perfect compatibility and function without any additional programming required on your end.
Is this part difficult to install myself?
For most DIYers with basic hand tools, this is a straightforward installation. The module is typically easy to access, and since it comes pre-programmed, the job involves simply swapping the old unit for the new one. See our installation guide above for the basic steps.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal PCM failure (like codes P0601-P0606) or a fault the PCM is responsible for, then yes, this replacement module will resolve the issue and allow the light to be cleared.
Is any other setup required after installation?
In some GM vehicles, a security relearn procedure (often called a Passlock or Passkey relearn) is needed to sync the new PCM with your vehicle’s anti-theft system. This can usually be done without special tools by following a simple key-cycling procedure.