Colorado 2WD V8-5.3L (2009)
2. Install the master cylinder (1) and O-ring seal (2) to the power vacuum brake booster.
Ensure the O-ring seal is properly positioned in the groove in the master cylinder body.
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
3. Install the master cylinder nuts (1) and tighten to 30 Nm (22 lb ft).
