1999-2002 Savana 1500 PCM Powertrain Control Module 16265035 Programmed

Is Your GM Truck or Van Acting Up? The PCM Might Be the Culprit.

If you’re behind the wheel of a late 90s or early 2000s GM vehicle like a Savana, Express, Silverado, or S10, you know they’re built to be workhorses. But when the central computer—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 or van can quickly become unreliable, leaving you stranded or dealing with unpredictable performance.

The PCM is the brain of your vehicle’s engine and transmission. It constantly analyzes data from dozens of sensors to manage everything from fuel injection and ignition timing to transmission shift points. After two decades of heat cycles, vibration, and millions of calculations, the delicate internal circuits can degrade, leading to a host of issues.

Common Symptoms of a Failing GM PCM

A bad PCM doesn’t always fail completely. Often, it starts with intermittent problems that seem to have no rhyme or reason. Based on the hundreds of these GM vehicles I’ve diagnosed, here are the most common signs that your PCM is on its way out:

• ✔ No-start condition where the engine cranks but won’t fire up.
• ✔ Intermittent stalling, especially after the engine has warmed up.
• ✔ Harsh, erratic, or delayed transmission shifting.
• ✔ A Check Engine Light with communication error codes (like U-codes) or a cluster of seemingly unrelated sensor codes.
• ✔ Drastically reduced fuel economy.
• ✔ The anti-theft or security light stays on, preventing the engine from starting.

The Direct Solution: A VIN-Programmed PCM

Replacing the PCM used to mean a trip to the dealership for expensive programming. We’ve eliminated that step. This Powertrain Control Module is the definitive solution to get your vehicle running correctly again. When you order from us, we take care of the critical programming process before we ship the part to you.

Here’s how it works:

• ✔ You provide us with your vehicle’s 17-digit VIN during checkout.
• ✔ Our technicians use your VIN to access the latest, most stable software updates directly from GM.
• ✔ We flash the module with your vehicle’s specific calibration, ensuring it’s a perfect match for your engine, transmission, and options.
• ✔ The module arrives at your door ready for installation. In most cases, this eliminates the need for any additional on-vehicle programming, saving you time and money.

This isn’t just a replacement part; it’s a fully prepared component designed to restore the performance and reliability you depend on. This unit is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787.

Confirmed Vehicle Fitment

Please verify your vehicle is on this list. Matching the part number (often 16263494) on your original module is the best way to ensure compatibility.

• ✔ Cadillac Escalade: 1999-2000
• ✔ Chevrolet Astro Van: 1999-2001
• ✔ Chevrolet Blazer S10: 1998-2000
• ✔ Chevrolet Express 1500/2500/3500 Van: 1999-2002
• ✔ Chevrolet C/K & Silverado 1500/2500/3500 Pickup: 1999-2000
• ✔ Chevrolet S10 Pickup: 1998-2000
• ✔ Chevrolet Suburban: 1999
• ✔ Chevrolet Tahoe: 1999-2000 (Classic Style)
• ✔ GMC Envoy: 1998-2000
• ✔ GMC Jimmy S15: 1998-2000
• ✔ GMC C/K & Sierra 1500/2500/3500 Pickup: 1999-2000
• ✔ GMC Safari Van: 1999-2001
• ✔ GMC Savana 1500/2500/3500 Van: 1999-2002
• ✔ GMC Sonoma: 1998-2000
• ✔ GMC Yukon & Yukon Denali: 1999-2000
• ✔ Isuzu Hombre: 1998-2000
• ✔ Oldsmobile Bravada: 1998-2000

Note: For some vehicles, a simple security relearn procedure may be required after installation. This can typically be done without special tools and instructions are widely available.