Restore Peak Performance and Reliability to Your GM Truck
Is your trusty Suburban, Tahoe, or Sierra plagued by a persistent check engine light, erratic shifting, or frustrating no-start conditions? These classic trucks are built to last, but the Powertrain Control Module (PCM) — the electronic brain of your engine and transmission — can be a common point of failure over time. Don’t let confusing electrical gremlins keep you off the road. This direct-fit PCM, part number 09366810, is the definitive solution to bring back the smooth, predictable performance you depend on.
We take the guesswork and hassle out of the repair. Unlike a generic module from a parts store, this unit arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This ensures seamless communication with all your vehicle’s systems, just like the original, and eliminates the need for an expensive trip to the dealership for programming. Regain that worry-free drive and the confidence that your truck will start and run right, every single time.
Warning Signs Your PCM Needs Attention
- ✔ Persistent Check Engine Light with codes like P0601, P0602, P0605 (Internal Control Module Memory Error).
- ✔ Harsh or unpredictable automatic transmission shifting.
- ✔ Unexplained engine stalling or stumbling, especially when warm.
- ✔ Intermittent no-start or hard-starting conditions.
- ✔ A noticeable drop in fuel economy.
- ✔ Communication errors with diagnostic scan tools.
From the Shop Floor: The Case of the Confusing Tahoe
A customer brought in his ’99 Tahoe, a family heirloom, with a list of bizarre symptoms. The transmission would shift hard one day and be fine the next. It would occasionally refuse to start, only to fire right up an hour later. He’d already replaced the battery and alternator. We hooked up the scanner and found a P0601 code stored. Instead of chasing phantom sensor issues, we went straight for the source. After installing a VIN-programmed PCM like this one, every single issue vanished. The customer was thrilled—it felt like he got his old truck back, reliable and ready for another 100,000 miles. It’s a powerful reminder of how critical this single component is.
Guided Installation for a Confident Fix
Replacing your 1998-1999 Suburban PCM is a straightforward job you can tackle with basic hand tools. With the programming already handled by us, you’re halfway there!
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On most of these trucks and vans, you’ll find the PCM in the engine bay, typically on the driver’s side fender well or near the battery.
- Disconnect the Harnesses: Carefully unplug the electrical connectors from the old module. There are usually retaining clips or levers; be gentle to avoid damaging them.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you’ll need it for the new one.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely tighten the bolts.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle’s anti-theft system may need to be synchronized with the new PCM. This typically involves a simple procedure of turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. Consult your owner’s manual for the exact procedure for your model.
Tailored Fit for Your GM Vehicle
This module is a direct replacement for part numbers 09366810, 16250279, and 09355699. It is confirmed to fit the following makes and models:
- Cadillac Escalade: 1999
- Chevrolet/GMC Pickups (1500, 2500, 3500): 1998-1999 (Gasoline engines)
- Chevrolet/GMC Vans (Express, Savana 1500, 2500, 3500): 1998 (Gasoline engines)
- Chevrolet Astro / GMC Safari: 1998-1999
- Chevrolet S10 / GMC Sonoma: 1998
- Chevrolet Blazer / GMC Jimmy / Oldsmobile Bravada: 1998
- GMC Envoy: 1998
- Isuzu Hombre: 1998 (4.3L)
- Chevrolet/GMC Suburban (1500, 2500): 1998-1999 (Gasoline engines)
- Chevrolet Tahoe / GMC Yukon: 1998-1999 (Gasoline engines)
This is the definitive solution for your 1998-1999 Suburban PCM and a wide range of other GM vehicles. By providing your VIN at checkout, you guarantee a component that is perfectly matched to your vehicle’s factory specifications, loaded with the latest GM software updates for optimal performance and longevity. Get back on the road with the peace of mind that comes from a quality, correctly programmed part.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential because it allows us to load the exact, correct software for your truck’s specific engine, transmission, and emissions equipment. This ensures perfect compatibility and function, eliminating the need for a trip to the dealer for expensive programming.
Is this a simple plug-and-play installation?
Almost! The module is programmed to your VIN, so the complex part is done. However, after installation, you will likely need to perform a simple security relearn procedure (often called a Passlock relearn) so the vehicle’s anti-theft system recognizes the new PCM. This procedure can be done at home with just the ignition key and takes about 30 minutes.
Will I need to do a CASE or Crankshaft Variation Relearn?
In some cases, a Crankshaft Variation Relearn (also known as CASE relearn) may be necessary to prevent a P1336 trouble code. While not always required immediately, it is recommended for optimal engine performance. This procedure typically requires a bi-directional scan tool, and many local repair shops can perform it for a minimal charge.
What if my original part number is slightly different?
This module is a direct replacement for part numbers 16250279, 09366810, and 09355699. If your part number is one of these, this module is the correct fit, regardless of which vehicle it came from originally. The key is the VIN-specific programming we provide.
What is your warranty policy on this module?
We stand behind our products. This Powertrain Control Module comes with a comprehensive warranty that covers any defects in materials or workmanship. Please see our warranty page for full details and feel confident in your purchase.