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 MANUALSCHEVROLET2012COLORADO 4WD L5-3.7LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINFLEX PLATESERVICE AND REPAIR
2012 Chevrolet Colorado 4WD L5-3.7L
Flex Plate: Service and Repair
2012 Chevrolet Colorado 4WD L5-3.7LSECTION Service and Repair
Engine Flywheel Replacement (with Automatic Transmission)
Special Tools
J 45059 Angle Meter
Removal Procedure
1. Remove the transmission. Refer to Transmission Replacement (2WD 2.9L and 3.7L) Transmission ReplacementTransmission Replacement (4WD 2.9L and 3.7L) Transmission ReplacementTransmission Replacement (4WD 5.3L) Transmission Replacement.
2. Remove and discard the flywheel bolts.
3. Remove the flywheel.
4. Clean and inspect the flywheel. Refer to Engine Flywheel Cleaning and Inspection (Automatic Transmission) 44. Engine Flywheel Cleaning and Inspection (Automatic Transmission)Engine Flywheel Cleaning and Inspection (Manual Transmission) 45. Engine Flywheel Cleaning and Inspection (Manual Transmission).
Installation Procedure
1. Position the flywheel to the crankshaft.
Caution: Refer to Fastener Caution Fastener Caution.
2. Install the NEW flywheel bolts.
Tighten the bolts a first pass to 40 Nm (30 lb ft). Using the J 45059 rotate the bolts a final pass an additional 45 degrees.
3. Install the transmission. Refer to Transmission Replacement (2WD 2.9L and 3.7L) Transmission ReplacementTransmission Replacement (4WD 2.9L and 3.7L) Transmission ReplacementTransmission Replacement (4WD 5.3L) Transmission Replacement.
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.