Is Your GM Truck or Van Experiencing Mysterious Issues?
If you’re dealing with a no-start condition, erratic shifting, a persistent Check Engine Light, or other baffling electrical problems on your late-90s GM vehicle, the Powertrain Control Module (PCM) is often the culprit. Over my 20+ years turning wrenches, I’ve seen hundreds of these ‘black box’ PCMs fail, causing headaches for owners. Symptoms can range from subtle performance loss to the vehicle being completely immobilized.
- ✔ Check Engine Light with no-communication codes (U-codes)
- ✔ Harsh or delayed automatic transmission shifts
- ✔ Engine cranks but won’t start
- ✔ Poor fuel economy and rough idling
- ✔ False sensor codes that return after clearing
The Direct-Fit, Plug-and-Play Solution
Forget expensive dealership visits and the hassle of finding a local shop willing to program a replacement module. This is a quality, tested used PCM that comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest GM software updates, ensuring your engine and transmission operate with the most current logic for optimal performance and efficiency. This is not just a part; it’s a complete, ready-to-install solution.
Expert Pro Tip: Before You Replace Your PCM…
In my shop, I’ve seen countless PCMs replaced unnecessarily. Before you swap the module, take 10 minutes to disconnect the main electrical connectors on your old PCM and inspect the pins and sockets on both the module and the harness side. Look for any signs of green or white corrosion, or bent pins. Sometimes, simply cleaning these contacts with a dedicated electronics cleaner and a small brush can solve communication errors that mimic a bad PCM. It’s a simple check that could save you time and money.
Easy Installation for Your 1998-1999 Savana 1500 PCM
You don’t need to be a master mechanic to install this part. Because we handle all the programming beforehand, the process is straightforward. No special tools or dealer software required.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most Savana/Express vans, it’s in the LH rear of the engine compartment. On trucks and SUVs, it’s typically on the LH side of the engine bay.
- Disconnect the Connectors: Carefully unlatch and remove the electrical harness connectors from the old module.
- Swap the Modules: Unbolt the old PCM from its bracket and secure the new one in its place.
- Reconnect Everything: Firmly plug the harness connectors into your new PCM until they click into place. Reconnect the negative battery terminal.
- Start the Engine: Your vehicle will now start and run with the new, correctly programmed module. In some cases, a Crankshaft Variation Relearn (CASE Relearn) may be needed to clear a P1336 code, which can be done with many professional-grade scan tools.
Guaranteed Compatibility and VIN Programming
This module is the correct fit for a wide range of GM vehicles. Simply provide your 17-digit VIN during checkout, and we’ll ensure it’s a perfect match. This unit directly replaces the following part numbers:
Service ID: 09355699
Interchangeable Part Numbers: 16266645, 9355699, 16250279, 16258815, 09366810
This ECM is a confirmed fit for the following vehicles with Service ID 09355699:
- Chevrolet/GMC Vans (1998-1999): Express 1500/2500/3500, Savana 1500/2500/3500, Astro, Safari
- Chevrolet/GMC/Cadillac SUVs (1998-1999): Suburban 1500/2500, Tahoe, Yukon, Escalade, S10 Blazer, S15 Jimmy, Bravada, Envoy
- Chevrolet/GMC/Isuzu Pickups (1998-1999): C/K 1500/2500/3500, Sierra 1500/2500/3500, S10, Sonoma, Isuzu Hombre
Please note: This is a tested, used component sourced from a salvaged vehicle. It is a reliable and cost-effective alternative to a new part.