• 2003 Silverado Sierra 1500 HD 6.0L ECM ECU Engine Control Unit Module Computer
  • 2003 Silverado Sierra 1500 HD 6.0L ECM ECU Engine Control Unit Module Computer - image 2
  • 2003 Silverado Sierra 1500 HD 6.0L ECM ECU Engine Control Unit Module Computer - image 3
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2003 Silverado Sierra 1500 HD 6.0L ECM ECU Engine Control Unit Module Computer

2003 Silverado Sierra 1500 HD 6.0L ECM ECU Engine Control Unit Module Computer

Part number: 1111 58-C-05

$99.99 USD
$99.99 USD
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2003 Silverado Sierra 1500 HD 6.0L ECM ECU Engine Control Unit Module Computer. Electrical parts carry power and signals around the car.

Specifications

  • Part type: Electrical part
  • Engine: 6.0L
  • Model years: 2003

Fitment

Compatible with: 2003

What it does

Replacing a switch, relay or harness is usually a plug-in job once you find the fault. Electrical faults often show up as warning lights, rough running or no-start problems, and the right replacement part clears the cause rather than the symptom.

Installation & tips

  • Disconnect the battery before electrical work and check grounds first.
  • Fuses and relays: Cheap to keep spares.
  • Disconnect the battery before you unplug or splice any wiring, and test everything works before you refit trim panels.

FAQ

Which engine is it for?
It is listed for the 6.0L engine. Check the engine code on your vehicle if it was offered with more than one engine.

Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.

What should I check before ordering?
Compare the part number, specifications and fitment on this page with your vehicle and with the part you are replacing.

Before you order

  • Measure the part you are replacing and compare it with the specifications above.
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Electrical part: what to know

Many electrical faults are a bad connection rather than a failed part, so check grounds and connectors first.

Fitment notes

  • Engine: match the engine size and code to your vehicle; the same model often came with several engines.
  • Specs, lead time and warranty come from the manufacturer and supplier and can change. The details above this guide are the latest we have.

Not sure it fits? Send us your year, make, model, engine and trim and we'll check before you order.

Ask about fitment

What else to plan for

More for your car: Batteries & electrical

Questions about electrical part

Will this fit my car?
Check the title and details above for the vehicles and part number it is listed for. If you are not sure, contact us with your year, make, model, engine and trim and we will confirm fitment before you order.
How do I find an electrical fault?
Start with fuses, grounds and connectors, then test with a multimeter.
Where do specs and warranty details come from?
From the manufacturer. Each brand sets its own specs, lead times and warranty terms, and they can change. The product details above are the latest we have.

Questions & answers

No questions yet about this part. Ask about fitment, what's in the box or installation and we'll answer here.

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