Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2002SILVERADO 1500 HD, RWDREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSION DIAGNOSIS - 4L80-EREMOVAL & INSTALLATIONPOWERTRAIN CONTROL MODULEINSTALLATION
2002 Chevrolet Silverado 1500 HD, RWD
Powertrain Control Module: Installation
2002 Chevrolet Silverado 1500 HD, RWDSECTION Installation
- Install the PCM (4) to the PCM mounting bracket (7), ensuring that the mounting tabs (3) are engaged. See Fig 1.
- Secure the spring latch (2) to the PCM.
- Connect the PCM connectors (6) to the PCM (4). Tighten the PCM connector end bolts to specification. See TORQUE SPECIFICATIONS .
- Install the PCM cover (8) to the PCM mounting bracket (7), ensuring the mounting tabs on the PCM mounting bracket are engaged into the mounting holes in the PCM cover.
- If a new PCM is being installed, program the EEPROM. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.