Is Your 1997 GM Truck or Van Giving You Headaches?
If you’re behind the wheel of a classic 1997 GM workhorse like an Express Van, a Suburban, or a C/K Pickup, you know they’re built to last. But when the brain of the operation—the Powertrain Control Module (PCM)—starts to fail, it can cause some of the most frustrating and difficult-to-diagnose problems I see in my shop. Your dependable truck might suddenly refuse to start, run rough, shift erratically, or throw a check engine light that sends you on a wild goose chase replacing perfectly good sensors.
These symptoms often point directly to a failing PCM. After more than two decades of heat cycles, vibration, and exposure to the elements in that left-front engine compartment, the internal electronic components simply wear out. It’s a common failure point I’ve diagnosed hundreds of times on this specific platform.
The Real Solution: A Pre-Programmed, Direct-Fit PCM
This isn’t just a replacement part; it’s a complete solution. This is a replacement PCM, compatible with part number 16229684, that arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This is the single most critical step for a successful repair.
Why is VIN programming so important? Your 1997 GM vehicle has a unique combination of engine, transmission, emissions equipment, and other options. The PCM’s software must match these specifications exactly for everything to work correctly. Without this programming, the vehicle may not start, the transmission won’t shift properly, and you’ll be facing a costly trip to a dealership for programming. We handle all of that for you. We load the latest GM-certified software onto the module before it ships, making the installation process as straightforward as possible.
Expert Pro Tip: Don’t Get Fooled by Sensor Codes
A common scenario I see with failing 1997-era GM PCMs is a flood of seemingly unrelated sensor codes—like a TPS code, a MAP sensor code, and an O2 sensor code all at once. A less experienced tech might start replacing sensors, costing you time and money. The real culprit is often the PCM’s internal 5-volt reference circuit or the specific driver for those sensors failing. When you see multiple, simultaneous sensor circuit faults, it’s a strong indicator that the central computer itself is the problem, not the individual components.
Common Symptoms of a Failing 16229684 PCM:
If you’re experiencing any of the following, a faulty PCM is a very likely cause:
- ✔ Engine cranks but will not start
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Poor or erratic engine performance and hesitation
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Communication errors with diagnostic scan tools
- ✔ Reduced fuel economy
- ✔ Stalling for no apparent reason
Simple Ordering and Installation Process
Getting your truck back to factory-spec operation is easy. After you purchase the module, simply provide us with your 17-digit VIN. Our technicians will then program the PCM with the correct software for your exact vehicle. Installation is a direct swap, typically located in the engine bay on the driver’s side. While this is a direct replacement, please be aware that some vehicles may require a security relearn or Crankshaft Variation (CASE) relearn procedure after installation, which can often be performed without special tools.
Direct Replacement for Part Numbers:
- ✔ 16229684
- ✔ 8162296840
Guaranteed Vehicle Compatibility
This module is the correct fit for the following 1997 gasoline-engine models. Please confirm your vehicle is on this list:
- ✔ Astro Van: (LH front by battery)
- ✔ Blazer S10/Jimmy S15: (4.3L, 6-262)
- ✔ Bravada: (4.3L, 6-262)
- ✔ Chevrolet 1500/2500/3500 Pickup: (gasoline, LH front engine compartment)
- ✔ Express 1500/2500/3500 Van: (gasoline)
- ✔ GMC 1500/2500/3500 Pickup: (gasoline, LH front engine compartment)
- ✔ Isuzu Hombre: (4.3L, 6 cylinder)
- ✔ S10/S15/Sonoma Pickup: (4.3L, 6-262)
- ✔ Safari (GMC): (LH front by battery)
- ✔ Savana 1500/2500/3500 Van: (gasoline)
- ✔ Suburban 1500/2500: (gasoline, LH front engine compartment)
- ✔ Tahoe/Yukon: (gasoline, LH front engine compartment)