Restore Peak Performance to Your GM Truck or Van
As a technician with over two decades of experience under the hood, I’ve seen firsthand the frustration a failing Powertrain Control Module (PCM) can cause. Your 1999-2002 Savana 2500 Van isn’t just a vehicle; it’s a workhorse. When it’s down, you’re losing time and money. A faulty PCM, the electronic brain of your engine and transmission, can lead to a cascade of baffling issues, from poor fuel economy and erratic shifting to a complete no-start condition. This isn’t just an inconvenience—it’s a critical failure that needs a reliable solution.
This Powertrain Control Module is the definitive fix for those problems. We take the guesswork and dealer hassle out of the equation. Before this module ever ships, our team of specialists will flash it with the very latest GM-approved software updates, programmed specifically to your vehicle’s unique Vehicle Identification Number (VIN). This ensures seamless communication between all your vehicle’s systems and restores the precise performance and efficiency your GM was built for. This is the same level of service you’d get at a dealership, but without the high cost and scheduling delays.
A Technician’s Notebook
I remember a 2001 Express 2500 work van that came into the shop with a ghost of a problem. The owner, a plumber, said it would randomly refuse to start, but only after it had been running for a while on hot days. No check engine light, no consistent codes. After checking fuel pressure and spark, which were fine during testing, I suspected the PCM was failing under heat. I let the van idle in the bay for an hour, and sure enough, it stalled and wouldn’t restart. A quick check showed the 5-volt reference signal from the PCM was gone. After it cooled down, it started right up. We replaced the PCM with a VIN-programmed unit like this one, and that van was back on the job reliably the next day. These intermittent, heat-related failures are a classic sign of internal PCM breakdown.
Is Your GM Truck or Van Showing These Signs?
A failing PCM can manifest in many ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer is the culprit:
- ✔ Check Engine Light is on with communication-related or internal processor codes (e.g., P0601, P0605, P0606).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ The transmission shifts harshly, erratically, or at the wrong times.
- ✔ Stalling for no apparent reason, either at idle or while driving.
- ✔ Noticeable loss of power and poor acceleration.
- ✔ Other modules on the vehicle (like the ABS or BCM) cannot communicate with the PCM.
A Straightforward Guide to PCM Installation
This module is designed for a direct-fit replacement. With our pre-programming service, you can get your vehicle running in under an hour. For your 1999-2002 Savana 2500 Van, the PCM is typically located in the left-hand rear of the engine compartment.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electronic work.
- Locate the Module: Find the existing PCM in the engine bay. It’s a metal box with several large multi-pin electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once unplugged, unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Mount the new, pre-programmed module onto the bracket. Firmly reconnect the wiring harnesses, ensuring each plug is fully seated and the locking tabs click into place.
- Reconnect Power: Re-attach the negative battery terminal and tighten it securely.
- Perform Security Relearn: Turn the key to the ‘ON’ position (without starting the engine) for 10-15 minutes. This allows the vehicle’s security system to recognize the new PCM. Turn the key off, then start the engine. Your vehicle is ready to go!
Verified Vehicle Compatibility
This Programmed GM PCM 16263494 is a direct replacement for a wide range of popular GM trucks and vans from the late 1990s and early 2000s. While this listing is for the 1999-2002 Savana 2500 Van, it also fits many Silverado, Sierra, Tahoe, Yukon, Express, Astro, and S-10 models. Please confirm your vehicle is on the list below and that your original part number matches one of these: 16263494, 16265035, 8162634940, or 218-11787.
CHEVROLET 2500 PICKUP 00 Electronic Control Module; gasoline (LH front engine compartment)
EXPRESS 1500 VAN 00 Electronic Control Module; (LH rear engine compartment)
EXPRESS 2500 VAN 00 Electronic Control Module; (LH rear engine compartment), gasoline
EXPRESS 3500 VAN 00 Electronic Control Module; (LH rear engine compartment), gasoline
SAVANA 1500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), ID 16263494
ASTRO 00-01 Electronic Control Module; (LH front by battery), ID 16263494
GMC 3500 PICKUP 00 Electronic Control Module; gasoline (LH front engine compartment)
EXPRESS 2500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
S10/S15/SONOMA 99-00 Electronic Control Module; (RH front engine compartment), 4.3L
SAVANA 1500 VAN 00 Electronic Control Module; (LH rear engine compartment)
ASTRO 99 Electronic Control Module; (LH front by battery), (4.3L), ID 16263494
ISUZU HOMBRE 99-00 Electronic Control Module; (RH front engine compartment), 4.3L (6 cylinder)
SAFARI (GMC) 99-01 Electronic Control Module; (LH front by battery), ID 16263494
SAVANA 3500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
EXPRESS 1500 VAN 99 Electronic Control Module; (LH rear engine compartment), ID 16263494
GMC 1500 PICKUP 99 Electronic Control Module; 5.0L, (LH engine compartment), ID 16263494
BLAZER S10/JIMMY S15 98 Electronic Control Module; (RH front engine compartment), w/build date opt ZN4
GMC 1500 PICKUP 99 Electronic Control Module; 5.7L, (LH engine compartment), ID 16263494
SAVANA 3500 VAN 99 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
SAVANA 3500 VAN 00 Electronic Control Module; (LH rear engine compartment), gasoline
TAHOE 00 Electronic Control Module; Classic style (LH front engine compartment)
YUKON 99 Electronic Control Module; (LH engine compartment), ID 16263494
ESCALADE 99 Electronic Control Module; (LH front engine compartment), ID 16263494
ESCALADE 00 Electronic Control Module; (LH front under battery)
EXPRESS 2500 VAN 99 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
S10/S15/SONOMA 98 Electronic Control Module; 6-262 (4.3L), w/build date opt ZN4
YUKON 00 Electronic Control Module; (LH front under battery), Denali
BRAVADA 98 Electronic Control Module; (6-262, 4.3L), w/build date opt ZN4
CHEVROLET 3500 PICKUP 00 Electronic Control Module; gasoline (LH front engine compartment)
ENVOY 99-00 Electronic Control Module; (RH front engine compartment)
EXPRESS 1500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), ID 16263494
EXPRESS 3500 VAN 99 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
GMC 3500 PICKUP 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
ISUZU HOMBRE 98 Electronic Control Module; 4.3L (6 cylinder), w/extended build date opt ZN4
SIERRA 1500 PICKUP 99-00 Electronic Control Module; (LH front under battery), 6 cylinder
SAVANA 2500 VAN 00 Electronic Control Module; (LH rear engine compartment), gasoline
SUBURBAN 1500 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
CHEVROLET 1500 PICKUP 99 Electronic Control Module; 5.7L, (LH engine compartment), ID 16263494
EXPRESS 3500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
GMC 2500 PICKUP 00 Electronic Control Module; gasoline (LH front engine compartment)
SILVERADO 1500 PICKUP 99-00 Electronic Control Module; (LH front under battery), 6 cylinder
SUBURBAN 2500 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
BLAZER S10/JIMMY S15 99-00 Electronic Control Module; (RH front engine compartment)
CHEVROLET 3500 PICKUP 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
SAVANA 1500 VAN 99 Electronic Control Module; (LH rear engine compartment), ID 16263494
TAHOE 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
BRAVADA 99-00 Electronic Control Module; (RH front engine compartment)
CHEVROLET 1500 PICKUP 99 Electronic Control Module; 5.0L, (LH engine compartment), ID 16263494
SAVANA 2500 VAN 99 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
SAVANA 2500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
ENVOY 98 Electronic Control Module; (RH front engine compartment), w/build date opt ZN4
GMC 2500 PICKUP 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the module until we receive this information, as the programming is essential for it to function in your vehicle.
Is any additional programming needed after installation?
No. This module arrives ready to install. The only step required is a simple security relearn procedure, which involves turning the key to the ‘ON’ position for 10-15 minutes before starting the engine. No special tools or dealer visits are necessary.
Will this fix my specific check engine light code?
This PCM is a direct solution for internal module failure codes like P0601, P0605, and other communication errors. If your codes point to a specific sensor, that sensor should be tested and replaced first. A faulty PCM can sometimes cause misleading sensor codes, but it’s always best to diagnose thoroughly.
What if my original part number is not on the list?
It is critical to match your original part number to one of the compatible numbers (16263494, 16265035, 8162634940, 218-11787) to ensure correct functionality. If your number is different, please contact us with your VIN and original part number before ordering.
Is this a new or a used part?
This is a high-quality, inspected, and tested component that has been verified to meet or exceed original equipment specifications. It is then loaded with the latest vehicle-specific software from GM.