Is your GM truck or van running rough, stalling, or showing a persistent Check Engine Light? A failing Powertrain Control Module (PCM) is often the culprit behind these frustrating and hard-to-diagnose issues. This genuine used GM PCM, part number 09355699, is the reliable and cost-effective solution to restore your vehicle’s performance and dependability. We take the guesswork out of the repair by pre-programming the module to your specific Vehicle Identification Number (VIN) with the latest factory software updates from GM. This ensures a seamless installation process, getting you back on the road without a costly trip to the dealership.
From the Diagnostic Bay
A customer brought in a ’99 Suburban with an intermittent no-start and random stalling. They had already replaced the fuel pump, ignition coil, and crank sensor based on advice from forums, spending hundreds of dollars with no success. After hooking up our scanner, we noticed erratic data from the PCM. Instead of throwing more parts at it, we swapped in a known-good, programmed module. The truck fired right up and ran perfectly. This is a classic case where the central computer was the root cause, not the components it controls. A faulty PCM can send you on a wild goose chase, which is why starting with a reliable, correctly programmed module is key.
Common Symptoms of a Failing GM PCM
- ✔ Check Engine Light is on with various trouble codes
- ✔ Engine stalling or shutting off while driving
- ✔ Intermittent no-start or hard starting conditions
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or erratic engine idle
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Failure to pass an emissions test
- ✔ Communication errors with diagnostic scan tools
Your Direct-Fit 1998-1999 Savana 1500 PCM Solution
This module is the brain of your vehicle, controlling everything from fuel mixture and ignition timing to transmission shift points. When it fails, the entire system suffers. Our service eliminates the biggest hurdle in replacing this part: programming. By flashing the unit to your VIN before shipping, we ensure it communicates perfectly with your vehicle’s other modules right out of the box. While this is a plug-and-play installation, some vehicles may require a simple security relearn or Crankshaft Variation (CASE) relearn procedure, which can often be performed without special tools. This tested, used component provides original equipment functionality at a fraction of the cost of a new unit.
This computer is a direct replacement for a wide range of GM trucks and vans from the 1998-1999 model years. Please verify that your original module’s part number is 09355699 or one of the compatible numbers listed: 16266645, 9355699, 16250279, 16258815, 09366810, 9366810. Matching the part number is the most crucial step to guarantee compatibility for your Chevrolet, GMC, Cadillac, or Isuzu vehicle.
Frequently Asked Questions
Do I need to get this PCM programmed?
No. We handle the programming for you before we ship the part. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the latest GM software for your specific vehicle.
What is a CASE relearn and will I need to do one?
A CASE (Crankshaft Position System Variation) relearn procedure synchronizes the new PCM with your engine’s crankshaft position sensor. Many vehicles will not require this, but if you have a check engine light after installation with a code like P1336, a CASE relearn is necessary. This procedure typically requires a bi-directional scan tool.
Is this a new part?
No, this is a high-quality, tested, and fully functional used part sourced from a salvaged vehicle. Each unit is inspected to ensure it is ready for programming and installation, offering a reliable and economical alternative to a new module.
How do I find my original part number?
Your PCM’s part number is printed on a sticker on the case of the module itself. In most 1998-1999 GM trucks and vans, it is located in the engine compartment, often on the driver’s side fender or near the battery. You must match this number to ensure compatibility.
What happens if I don’t provide my VIN?
We cannot ship your order without your VIN. The programming is essential for the module to function in your vehicle. We will hold your order and contact you to get the necessary information before processing the shipment.