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.
2007 Chevrolet Colorado 2WD L4-2.9LFACTORY OEM SERVICE PROCEDURE
Engine Control Module
Powertrain Control Module Connector End Views
Powertrain Control Module (PCM) C1
Powertrain Control Module (PCM) C1 (Pin 1 To 19):
Powertrain Control Module (PCM) C1 (Pin 20 To 56):
Powertrain Control Module (PCM) C2
Powertrain Control Module (PCM) C2 (Pin 1 To 16):
Powertrain Control Module (PCM) C2 (Pin 17 To 73):
Powertrain Control Module (PCM) C3
Powertrain Control Module (PCM) C3 (Pin 1 To 21):
Powertrain Control Module (PCM) C3 (Pin 22 To 56):
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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