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.
Fuel Pressure Control Module: Service and Repair
2012 Chevrolet Express 2500 V8-4.8LSECTION Service and Repair
Compressed Natural Gas Control Module Replacement
Removal Procedure
Warning:
Refer to Battery Disconnect Warning Service Precautions.
1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.
3. Remove the mid ship tank cover. Refer to Compressed Natural Gas Tank Cover Replacement - Midship Tank Compressed Natural Gas Tank Cover Replacement - Midship Tank
4. Remove the 3 electrical connectors from the FCM.
5. Remove the 2 FGCM mounting bracket bolts and 2 nuts.
6. Pull the FGCM out from behind the bracket while pulling the connectors through the bracket.
Installation Procedure
Caution:
Refer to Fastener Caution Fastener Caution.
1. Install FGCM onto bracket while pulling connectors through bracket opening one by one.
2. Install the 2 FGCM mounting bracket bolts and tighten to 1.5 Nm (13 lb in).
3. Connect the 3 electrical connectors to the FGCM.
4. Install the mid ship tank cover. Refer to Compressed Natural Gas Tank Cover Replacement - Midship Tank Compressed Natural Gas Tank Cover Replacement - Midship Tank
Warning:
Refer to Battery Disconnect Warning Service Precautions.
5. Install the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.
RENDER: 1.0x
NO RELATED
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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.