Is Your GM Truck or Van Running Rough? Get the Brains of the Operation.
If your 1998-1999 GMC Savana 1500, Chevy Express, or other compatible GM vehicle is experiencing frustrating issues like a persistent Check Engine Light, erratic shifting, stalling, or a complete no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer, the PCM manages everything from fuel delivery and spark timing to transmission shift points. When it fails, the vehicle’s performance and reliability suffer dramatically.
From the Shop Floor: A customer’s ’99 Chevy Express 2500 (which uses this exact PCM) came in on a tow truck last week. It would crank all day but wouldn’t fire up. We quickly verified it had fuel pressure and spark, but the injector pulse was non-existent. A quick scan showed no communication with the PCM. After confirming the module had proper power and ground at the connector, we knew the internal circuits had failed. Swapping in a correctly programmed PCM like this one had the van running smoothly in under 20 minutes. It’s a common failure I’ve diagnosed hundreds of times on these GMT400 and GMT600 platform vehicles.
The Direct Solution: A VIN-Programmed 1998-1999 Savana 1500 PCM
Don’t waste time and money chasing symptoms. This is a dependable, tested, used OEM Powertrain Control Module that provides a direct-fit solution. We take the guesswork out of the repair by pre-programming the unit to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures all factory settings and the latest GM software updates are loaded, making the installation process straightforward.
- โ VIN-Programmed for You: We flash the module with your vehicle’s VIN, ensuring it communicates perfectly with your engine, transmission, and security system.
- โ Solves Common Issues: A direct fix for no-start conditions, poor fuel economy, harsh shifting, and various diagnostic trouble codes (DTCs).
- โ Cost-Effective Repair: Get a reliable OEM part without the high cost of a new module from the dealership.
- โ Broad Compatibility: Replaces a wide range of part numbers, including 09355699, 16266645, 16250279, and more.
Plug-and-Play Installation: No Dealer Visit Required
Installing your programmed PCM is a job most DIYers can handle with basic tools. Follow these simple steps to get your vehicle back in top shape:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most Savana/Express vans, it’s in the engine compartment on the driver’s side. On pickups and SUVs, it’s typically on the driver’s side inner fender.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old PCM. Inspect them for any green or white corrosion.
- Remove Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install New Module: Bolt your new, pre-programmed PCM into place and securely reconnect the wiring harnesses. You should hear a ‘click’ as they lock in.
- Reconnect Battery: Re-attach the negative battery terminal. The vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes.
Expert Pro Tip: Clean Your Connectors!
Before plugging in your new PCM, take a moment to spray the vehicle’s harness connectors with a quality electronics cleaner. Use a small, soft brush (like a toothbrush) to gently scrub away any dirt or corrosion from the pins. This simple step prevents poor connections, which are a common cause of intermittent issues that can mimic PCM failure.
Guaranteed to Fit Your GM Truck, Van, or SUV
This module is a direct replacement for units with service ID number 9355699 and part numbers 09366810, 16266645, 16250279, 16258815. It fits a massive range of 1998-1999 GM vehicles. Please verify your vehicle is on the list below to ensure compatibility.
Compatible Vehicles:
- Astro / Safari (1998)
- Blazer S10 / Jimmy S15 (1998)
- Bravada (1998)
- Cadillac Escalade (1999)
- Chevrolet / GMC 1500, 2500, 3500 Pickups (1998-1999)
- Envoy (1998)
- Express / Savana 1500, 2500, 3500 Vans (1998-1999)
- Isuzu Hombre (1998)
- S10 / S15 / Sonoma Pickups (1998)
- Suburban 1500 / 2500 (1998-1999)
- Tahoe / Yukon (1998-1999)
IMPORTANT: After purchase, please send us your 17-digit VIN. We cannot ship your order until we have this information to program the module correctly.