Restore Peak Performance to Your GM Workhorse
If you’re dealing with a frustrating no-start, erratic shifting, a persistent check engine light, or poor fuel economy in your 1999-2002 Savana 2500 Van, the Powertrain Control Module (PCM) is often the culprit. As a technician with over two decades of experience, I’ve seen how a failing engine computer can cause a cascade of hard-to-diagnose issues. This isn’t just a replacement part; it’s a direct-fit, reliable solution engineered to restore your vehicle’s original performance and dependability. We take the guesswork and extra costs out of the repair by programming the module specifically to your vehicle’s VIN before it ever leaves our facility.
From the Diagnostic Bay: The Intermittent Stall
A customer brought in his 2001 Express 2500, a sister van to the Savana. The complaint was a classic head-scratcher: it would run perfectly for days, then suddenly stall at a stoplight and refuse to restart for an hour. No consistent codes, just chaos. After checking fuel pressure and ignition, we focused on the PCM. On these vans, the location in the engine bay exposes the module to intense heat cycles. Over 20 years, these cycles can cause microscopic cracks in the circuit board. When the engine got hot, a connection would fail, killing the engine. Once it cooled, the connection was restored. Swapping in a quality, pre-programmed 1999-2002 Savana 2500 PCM like this one solved the problem permanently. It’s a fix I’ve performed hundreds of times on this GM platform.
The Power of Pre-Programmed, VIN-Matched Service
The biggest hurdle in replacing a modern vehicle’s computer is the required programming. Typically, this means towing your vehicle to a dealership and paying hundreds in labor fees. We eliminate that step entirely. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this PCM with the latest, most stable software updates from General Motors. This ensures that all components, from the engine to the transmission, communicate flawlessly. When your part arrives, it’s ready for installation right out of the box.
Is Your GM Truck or Van Showing These Symptoms?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, a faulty engine computer is a likely cause:
- ✔ Check Engine Light is on with codes like P0601, P0602, or P0606
- ✔ Vehicle refuses to start or has intermittent starting issues
- ✔ Noticeable decrease in fuel efficiency
- ✔ Rough or unstable idling
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Engine stalling or hesitating during acceleration
- ✔ Failure to pass an emissions inspection
A Straightforward Guide to Installation
Replacing the PCM on these vehicles is a job most DIYers can handle with basic tools. Follow these steps for a successful installation of your new 1999-2002 Savana 2500 PCM.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- Locate the PCM: On most Savana and Express vans, the PCM is located in the engine compartment on the driver’s side, near the firewall or airbox. On some pickups and SUVs, it may be under the battery tray.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old module. These connectors have locking tabs; do not force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. It’s typically held in by two or three bolts.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely fasten the bolts.
- Reconnect Everything: Firmly plug the wiring harnesses into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn (If Needed): In some cases, a simple security relearn procedure is required. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Your vehicle’s service manual will have the specific steps if necessary.
Will This Fit My Vehicle?
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787. It is guaranteed to fit a wide range of GM trucks and vans. Please verify your vehicle is on the list below. Providing your VIN ensures we send the correctly programmed unit for your specific application.
CHEVROLET 3500 PICKUP 99-00 (gasoline)
EXPRESS/SAVANA 1500 VAN 99-02
EXPRESS/SAVANA 2500 VAN 99-02 (gasoline)
EXPRESS/SAVANA 3500 VAN 99-02 (gasoline)
GMC 1500/2500/3500 PICKUP 99-00 (gasoline)
SIERRA/SILVERADO 1500 PICKUP 99-00 (4.3L V6)
ASTRO/SAFARI VAN 99-01 (4.3L)
BLAZER/JIMMY S-Series 98-00 (w/ build date opt ZN4 for 98)
S10/SONOMA PICKUP 98-00 (4.3L, w/ build date opt ZN4 for 98)
BRAVADA 98-00 (w/ build date opt ZN4 for 98)
ENVOY 98-00 (w/ build date opt ZN4 for 98)
ISUZU HOMBRE 98-00 (4.3L, w/ build date opt ZN4 for 98)
SUBURBAN 1500/2500 99 (gasoline)
TAHOE/YUKON 99-00 (Classic/Denali style)
ESCALADE 99-00
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before we ship the part. Just provide your VIN at checkout, and the module will arrive ready to install with the latest GM software for your vehicle.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your specific vehicle. We use it to access the exact factory software, security information, and operational parameters for your truck or van, ensuring a perfect match.
Is this a simple plug-and-play installation?
Yes, for over 95% of vehicles, it is. Once programmed to your VIN, you simply swap the modules. In rare instances, a simple ‘security relearn’ procedure is needed, which does not require any special tools.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine and transmission functions. If your shifting issues are caused by faulty electronic commands from a failing computer, this new 1999-2002 Savana 2500 PCM will resolve them.
What if I have the part number 16263494?
This module is a fully compatible replacement for part number 16263494 and several others listed in the description. As long as your vehicle is on the fitment list, this part will work correctly.