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 Express 1500 RWD V6-4.3LFACTORY OEM SERVICE PROCEDURE
Engine Control Module: Locations
Engine Controls Component Views
LR of the Engine Compartment
1 - S101
2 - C109
3 - Powertrain Control Module (PCM) C1, C2
4 - Fuse Block Underhood - C6
5 - Fuse Block Underhood - C1
6 - Horn Assembly Connector
7 - C100
8 - C101
9 - A/C Compressor Clutch Connector (C60)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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