Replace your failed engine computer with an OEM 2003 Chevrolet Silverado 1500 4.8L PCM (also called an ECM or ECU), programmed to your vehicle before it ships.

This module is a direct replacement for units carrying service number 12589463, generic number 12589162. Every unit is refurbished, bench-tested against OEM specification, and flashed with the latest manufacturer software updates.

What you receive

• Programmed to your VIN before dispatch, so it installs plug and play
• Bench-tested by our technicians before it leaves us
• Lifetime warranty for as long as you own the vehicle
• Free US shipping, typically delivered in 2-4 business days
• No core charge – keep your old unit

Common symptoms of a failed Chevrolet Silverado 1500 PCM

• Engine cranks but will not start
• Intermittent stalling, hard starting or rough idle
• Transmission shifting erratically or stuck in limp mode
• No communication with a scan tool
• Multiple unrelated trouble codes appearing at once

Installation note for GM vehicles

These trucks use a factory anti-theft system. After fitting the module a security relearn may be required before the engine will start. We include the procedure with your order, and it needs no special tools.

Before you order

Enter your 17-character VIN at checkout so we can match the module to your exact truck. If you are unsure which part you need, call 516-494-7838 and a technician will confirm fitment with you.