Is Your GM Van or Truck Suddenly Unreliable?
If you’re dealing with a frustrating no-start, erratic idling, stalling, or a persistent check engine light in your 1998-1999 GM vehicle, the Powertrain Control Module (PCM) is often the culprit. After 20+ years on the road, the original electronics can fail from heat cycles and vibration. I’ve seen it hundreds of times in my shop. You need a solution that’s reliable, affordable, and gets you back to work without the hassle and expense of a dealership visit. This genuine, used OEM PCM is your answer.
The Smart, Simple Solution: VIN-Programmed & Ready to Install
Forget about towing your vehicle to a dealer and paying for expensive diagnostics and programming fees. We take all the guesswork out of the repair. Simply provide us with your vehicle’s VIN (Vehicle Identification Number) during checkout, and our technicians will program this PCM with the latest official GM software updates specific to your exact vehicle. It arrives at your doorstep ready for a true plug-and-play installation.
Real-World Shop Experience
“A customer’s 1999 Savana 2500 came in last week with these exact symptoms: it would crank but not start, and when it did run, it shifted hard between first and second gear. He’d already replaced the fuel filter and was about to spend a fortune on a transmission diagnosis. A quick scan showed a ‘PCM Processor Fault’ code. We installed one of these VIN-programmed units, and the van fired right up and shifted perfectly. The original computer’s internal voltage regulator had failed—a common issue on these workhorse vans.”
Why a Pre-Programmed OEM PCM is the Best Choice
- ✔ Fix Common Issues: Solves problems like harsh shifting, poor fuel economy, engine stalling, no-start conditions, and false sensor codes.
- ✔ Save Time and Money: This unit is programmed before shipping, eliminating the need for expensive dealer-only tools or programming services.
- ✔ OEM Reliability: Sourced from a salvaged vehicle, this is a genuine GM part, not a low-quality aftermarket knock-off. It’s built to the original factory specifications for a perfect fit and function.
- ✔ Updated Software: We flash it with the newest GM calibrations, which can resolve factory bugs and improve engine and transmission performance.
Guaranteed Fitment for Part Number 9355699
This module is a direct replacement for service number 9355699 and is also compatible with the following part numbers: 09355699, 16266645, 16250279, 16258815, and 09366810. Please verify your original module has one of these numbers to ensure compatibility. This unit fits a wide range of GM trucks and vans from 1998-1999, including the Chevrolet Express, GMC Safari, Cadillac Escalade, Chevy/GMC Pickups, and many more. Please check the detailed fitment list to confirm it matches your specific vehicle.
Plug-and-Play Installation: No Dealer Visit Required
Installing your replacement 1998-1999 Savana 1500 PCM is a straightforward process you can do in your own driveway. Follow these steps for a successful installation:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- 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 inner fender.
- Disconnect Connectors: Carefully unlatch and remove the electrical wiring harnesses from the old PCM. Inspect the connector pins for any signs of corrosion or damage. Clean them with an electronics-safe contact cleaner if necessary.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: 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. The vehicle is now ready to start. No further programming is required.