Is Your GM Truck or SUV Acting Up?
If your 1998-1999 Suburban, Tahoe, Yukon, or another GM vehicle from that era is suddenly stalling, refusing to start, or shifting erratically, the problem might not be a bad sensor or a failing transmission. After 20+ years on the road, the original Powertrain Control Module (PCM) is often the root cause of these frustrating and hard-to-diagnose issues. You need a reliable solution that gets you back on the road without the hassle and expense of a dealership visit.
The Direct Solution for Common PCM Failures
This is a thoroughly tested, used OEM Powertrain Control Module (PCM), part number 9355699. We take the guesswork out of the repair. Before this module ships, we will flash it with the latest official GM software updates, precisely programmed to your vehicle’s unique Vehicle Identification Number (VIN). This ensures it works seamlessly with your specific engine, transmission, and options, restoring factory performance and communication.
Real-World Diagnosis: A Technician’s Experience
“A customer’s ’99 Tahoe came in last week with these exact symptoms: it would crank but not start, and when it did run, the transmission would slam into gear. The owner had already replaced the fuel pump and crank sensor. My scan tool couldn’t communicate with the ECM. After confirming the module had good power and ground at the connector, we knew the internal processor had failed. Swapping in a VIN-programmed PCM like this one had it running perfectly in under 15 minutes. It’s a common failure I’ve seen hundreds of times on these GMT400 platform vehicles.”
Is a Failing PCM Causing Your Headaches?
A faulty computer can mimic many other problems. Here are the classic signs that your module is the culprit:
- โ Check Engine Light is on with communication error codes (U-codes).
- โ Vehicle cranks but refuses to start.
- โ Harsh, erratic, or delayed automatic transmission shifting.
- โ Poor fuel economy and engine performance, including stalling.
- โ No communication with your OBD-II scan tool.
- โ Apparent failure of multiple unrelated sensors at the same time.
Plug-and-Play Installation: No Dealer Visit Required
Installing your replacement 1998-1999 Suburban PCM is a straightforward job you can do in your own driveway. Since we program it to your VIN, no additional security relearn procedures are typically required for these models.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most trucks and SUVs like the Suburban, it’s in the engine compartment on the driver’s side, near the firewall or fender. On vans like the Express/Savana, it may be in the rear of the engine compartment.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. Inspect the pins for any corrosion or damage and clean them with electrical contact cleaner if necessary.
- Remove the Old Module: Unbolt the original PCM from its mounting bracket.
- Install the New Module: Bolt the replacement module 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. Your vehicle is now ready to start.
Guaranteed Fitment and Compatibility
This module, identified by service number 9355699, is a direct replacement for a wide range of GM vehicles. To ensure a perfect match, please verify that your original module has one of the following part numbers printed on its label:
Compatible Part Numbers: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, 9366810
This part fits dozens of models including the Chevrolet/GMC C/K 1500/2500/3500 Pickups, Suburban, Tahoe, Yukon, Express/Savana Vans, Cadillac Escalade, S10/Sonoma, Blazer/Jimmy, and more. Please use the fitment chart and verify your part number to confirm compatibility.
IMPORTANT: After purchasing, you must provide us with your 17-digit VIN to allow us to program the module for you.