Is Your GM Truck or Van Plagued by Mysterious Electrical Gremlins?
If your 1998-1999 GMC Savana 3500, or a similar GM vehicle, is suffering from a no-start condition, erratic transmission shifting, a persistent check engine light with communication codes (like U-codes), or stalling for no reason, the Powertrain Control Module (PCM) is a very likely culprit. As the brain of your vehicle’s engine and transmission, when it fails, it can cause a cascade of frustrating and hard-to-diagnose problems. This isn’t just an inconvenience; for a work van like the Savana, it’s downtime that costs you money.
This is a reliable, tested, and used OEM Powertrain Control Module that has been expertly programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest available software updates from General Motors, ensuring optimal performance and compatibility. This is a direct, plug-and-play solution designed to get you back on the road quickly and affordably, without a mandatory trip to the dealership for expensive programming.
From the Shop Floor: A Real-World Diagnosis
“Just last month, a ’99 Chevy Express 3500 work van was towed to my bay. The owner said it died at a stoplight and wouldn’t restart. The fuel pump wasn’t priming, and my professional scan tool couldn’t communicate with the engine controller. After confirming the PCM had proper power and ground at the connectorsโa critical first stepโit was clear the module itself had failed internally. We installed one of these VIN-programmed units, and the van fired right up. The customer saved hundreds on dealer diagnostics and programming, and his van was back in service the next day.”
Key Symptoms of a Failing 1998-1999 Savana 3500 PCM:
- โ No-start or intermittent starting issues.
- โ The engine cranks but will not fire up.
- โ Harsh, erratic, or delayed transmission shifts.
- โ Check Engine Light is on with multiple, unrelated trouble codes.
- โ Loss of communication with the scan tool.
- โ Drastically reduced fuel economy.
- โ Apparent failure of multiple sensors at once.
Simple, Hassle-Free Installation Process
Replacing your PCM is a straightforward job you can do with basic hand tools. No complex wiring or dealer-specific equipment is needed.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most Savana/Express vans, it’s in the engine compartment on the driver’s side, near the fender or firewall.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. Inspect the pins for any corrosion or damage before proceeding.
- Remove Old Module: Unbolt the old PCM from its mounting bracket.
- Install New Module: Bolt the new, pre-programmed PCM into place and securely reconnect the wiring harnesses.
- Reconnect Battery: Re-attach the negative battery terminal. Your vehicle is now ready to start.
Guaranteed Compatibility and VIN Programming
This module is a direct replacement for several part numbers. To ensure a perfect match, please verify that your original module has service ID number 09355699 printed on the label. This unit is compatible with the following part numbers:
Compatible Part Numbers: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, 9366810
IMPORTANT: After your purchase, you must provide us with your 17-digit VIN. Our technicians will use this to load the correct GM-certified software for your vehicle’s exact configuration, ensuring it works seamlessly right out of the box.