Restore Peak Performance to Your GM Van or Truck
If you’re dealing with frustrating engine problems like stalling, a persistent check engine light, or erratic performance in your work van or truck, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer, it controls everything from fuel mixture and spark timing to transmission shifts. This isn’t just an inconvenience; it can affect your fuel economy, reliability, and even your ability to pass an emissions test. This replacement PCM is a reliable and cost-effective solution to get your vehicle running right again.
Case Study: A Tricky Diagnosis
I remember a 1999 Express van that came into my shop with a complaint of intermittent stalling at stoplights. The owner, a local plumber, was losing jobs because of it. There were no consistent trouble codes, just a history of random communication errors. After checking all the usual suspects—fuel pressure, ignition components, wiring—we focused on the PCM. We swapped in a tested, correctly programmed module like this one, and the problem vanished instantly. The van wasn’t just fixed; its throttle response was crisper, and the owner reported better mileage. It’s a perfect example of how the right computer, correctly programmed, is the foundation of a reliable vehicle.
The Critical Importance of VIN Programming
Why is providing your VIN so important? A generic PCM from a salvage yard won’t work correctly. Your vehicle has a unique combination of options, security systems (like GM’s Passlock/VATS), and emissions equipment. We flash this PCM with the latest GM-authorized software specific to your VIN. This ensures that the engine computer communicates flawlessly with the rest of your vehicle, just like the original did. This service saves you a costly trip to the dealership and eliminates the guesswork, making for a smooth installation process.
Is Your Van Exhibiting These Classic PCM Failure Signs?
- ✔ Unexplained Check Engine Light illumination
- ✔ Engine stalling or shutting off while driving
- ✔ No-start or hard-starting conditions
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failed emissions test
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0605, or various U-codes indicating module communication failure
A Straightforward Guide to Your PCM Swap
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the PCM: On most of these vans and trucks, the PCM is located in the engine compartment, typically on the driver’s side fender or near the battery.
- ✔ Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. Be gentle, as the plastic clips can become brittle over time.
- ✔ Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- ✔ Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely reconnect the wiring harnesses. Ensure they click into place.
- ✔ Reconnect Battery: Reattach the negative battery terminal.
- ✔ Perform Security Relearn: You will likely need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. We include instructions for this easy process.
Verified Vehicle Compatibility
This module is a direct replacement for service number 09366810 and interchanges with part numbers 09355699, 16266645, 16250279, and 16258815. It is guaranteed to fit the following vehicles with matching part ID 9355699:
CHEVROLET 2500 PICKUP 98-99 (Gasoline)
CHEVROLET 3500 PICKUP 98-99 (Gasoline)
GMC 1500 PICKUP 98-99 (Gasoline)
GMC 2500 PICKUP 98-99 (Gasoline)
GMC 3500 PICKUP 98-99 (Gasoline)
EXPRESS 1500 VAN 98-99
EXPRESS 2500 VAN 98-99 (Gasoline)
EXPRESS 3500 VAN 98-99 (Gasoline)
SAVANA 1500 VAN 98-99
SAVANA 2500 VAN 98-99 (Gasoline)
SAVANA 3500 VAN 98-99 (Gasoline)
TAHOE 98-99 (Gasoline)
YUKON 98-99
SUBURBAN 1500 98-99 (Gasoline)
SUBURBAN 2500 98-99 (Gasoline)
ESCALADE 99
ASTRO 98
SAFARI (GMC) 98
BLAZER S10/JIMMY S15 98 (4.3L)
S10/S15/SONOMA 98 (4.3L)
BRAVADA 98 (4.3L)
ENVOY 98 (4.3L)
ISUZU HOMBRE 98 (4.3L)
Frequently Asked Questions
Do I need to do any programming myself?
Do I need to do any programming myself?
No. We handle all the programming before we ship the part. Just provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software for your specific vehicle. It arrives ready for installation.
Is this a new part?
Do I need to do any programming myself?
No. We handle all the programming before we ship the part. Just provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software for your specific vehicle. It arrives ready for installation.
What is the security relearn procedure?
Do I need to do any programming myself?
No. We handle all the programming before we ship the part. Just provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software for your specific vehicle. It arrives ready for installation.
How do I find my part number to ensure this is a match?
Do I need to do any programming myself?
No. We handle all the programming before we ship the part. Just provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software for your specific vehicle. It arrives ready for installation.
What information do you need from me?
Do I need to do any programming myself?
No. We handle all the programming before we ship the part. Just provide your vehicle’s VIN during or after checkout, and we will flash the module with the latest GM software for your specific vehicle. It arrives ready for installation.