C 1500 Yukon 2WD V8-5.3L VIN Z Flex Fuel (2003)
See: Engine, Cooling and Exhaust/Service Precautions/Vehicle Damage Warnings/Fastener Notice
11. Tighten the air cleaner outlet duct clamp screws at the following locations:
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The throttle body
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The MAF/IAT sensor
Tighten the screws to 7 Nm (62 inch lbs.).