Restore Peak Performance to Your GM Truck or Van
Is your truck or van suffering from frustrating issues like a persistent Check Engine Light, rough idling, stalling, or failing emissions tests? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Ignoring them can lead to poor fuel economy, unpredictable performance, and even a no-start condition that leaves you stranded. This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s reliability. This tested, used PCM, part number 9355699, is the dependable and affordable solution to get your vehicle running right again.
Case Study: A Tricky Diagnosis
I remember a 1999 Chevy Suburban that came into my shop with a maddeningly intermittent no-start problem. The owner had already replaced the battery, alternator, and starter. It would crank but not fire, then an hour later, start perfectly. There were no consistent trouble codes, just a generic communication error that would pop up occasionally. After checking fuel pressure and spark, which were fine when it decided to run, I focused on the PCM. On these older GM trucks, heat soak and vibrations can cause microscopic cracks in the PCM’s circuit board. We swapped in a pre-programmed PCM like this one, and the problem vanished instantly. The owner was thrilled to have his reliable family hauler back without paying the exorbitant dealership price for a new module and programming.
Is Your Truck or Van Showing These Signs?
- ✔ Persistent and illuminated Check Engine Light (CEL).
- ✔ Engine stalling, stumbling, or hesitating unexpectedly.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start or intermittent starting problems.
- ✔ Failure to communicate with a diagnostic scan tool.
- ✔ Stored diagnostic trouble codes (DTCs) such as P0601, P0605, or P0606 pointing to internal module failure.
The Smart, Simple Solution: A Plug-and-Play PCM
The biggest hurdle in replacing a PCM has always been the expensive programming required at a dealership. We eliminate that step entirely. When you purchase this module, you simply provide us with your vehicle’s 17-digit VIN. Our technicians will then flash the unit with the latest, most stable GM factory software specific to your exact vehicle configuration. This ensures that your engine, transmission, and all related systems communicate flawlessly from the moment you install it. You receive a part that is truly plug-and-play, saving you time, money, and a trip to the dealer. This is the ideal solution for both seasoned professional mechanics and first-time DIYers looking for a reliable fix for their 1998 Isuzu Hombre PCM or other compatible GM vehicle.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes to allow capacitors to discharge.
- ✔ Locate the PCM: On most of these GM trucks and vans, the PCM is located in the engine compartment, often on the driver’s side inner fender or near the battery.
- ✔ Disconnect the Connectors: Carefully unlatch and remove the wiring harness connectors from the old PCM. Inspect the pins for any corrosion or damage.
- ✔ Remove the Old Module: Unbolt the old PCM from its mounting bracket. It’s typically held in by a few small bolts.
- ✔ Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely fasten the bolts.
- ✔ Reconnect Everything: Firmly plug the wiring harness connectors into the new module until they click into place. Reconnect your negative battery terminal.
- ✔ Perform Security Relearn (If Needed): In many cases, the vehicle will start and run perfectly. Some models may require a simple security relearn procedure, which typically involves cycling the key and can be done without special tools. Your vehicle’s service manual will have the specific steps.
Verified Vehicle Compatibility
This module is a direct replacement for service number 9355699 and is interchangeable with part numbers 16266645, 16250279, 16258815, 09366810, and 9366810. It is confirmed to fit a wide range of popular GM models, including but not limited to:
- ✔ 1998-1999 Chevrolet & GMC C/K 1500, 2500, 3500 Pickups (Gasoline)
- ✔ 1998-1999 Chevrolet Tahoe & GMC Yukon (Gasoline)
- ✔ 1998-1999 Chevrolet & GMC Suburban (Gasoline)
- ✔ 1998-1999 Chevrolet Express & GMC Savana 1500, 2500, 3500 Vans (Gasoline)
- ✔ 1999 Cadillac Escalade
- ✔ 1998 Chevrolet Astro & GMC Safari
- ✔ 1998 Chevrolet S10, GMC Sonoma, Chevrolet Blazer, GMC Jimmy (4.3L V6)
- ✔ 1998 Oldsmobile Bravada & GMC Envoy (4.3L V6)
- ✔ 1998 Isuzu Hombre (4.3L V6)
Always match your original part number or use the fitment list to confirm compatibility. If you’re unsure, just send us a message with your VIN, and we’ll verify it for you.
Frequently Asked Questions
Do I need to do anything after I buy it?
Yes. After your purchase, please send us an email with your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as we need it to program the module specifically for your vehicle.
Is this a new part?
No, this is a high-quality, tested used part sourced from a salvaged vehicle. Each unit is inspected and verified to be fully functional before being programmed and shipped. This provides a reliable, cost-effective alternative to a new dealer part.
Will I need to have this programmed by a dealer?
Absolutely not! The purchase price includes programming the module to your vehicle’s VIN with the latest GM software updates. It will arrive ready to install, saving you hundreds of dollars in dealership fees.
What if my part number is slightly different?
This module replaces several part numbers, including 16266645, 16250279, and others listed above. As long as your original part number is on our cross-reference list, this module will work for you.
Is any other work required after installation?
On some GM vehicles, a simple security relearn procedure may be necessary after installation. This procedure does not require any special tools and instructions can typically be found online or in your owner’s manual. It often involves turning the key to the ‘On’ position for 10-15 minutes.