C 1500 Yukon 2WD V8-5.3L VIN Z Flex Fuel (2003)
Tighten the nuts to 50 Nm (39 ft. lbs.).
7. Install the exhaust muffler nuts.
Tighten the nuts to 40 Nm (30 ft. lbs.).
8. Connect the oxygen sensor electrical connectors (1, 2).
9. Connect the CPA retainers.
10. Clip the oxygen sensors electrical connectors to the following:
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Hose clip
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Transmission crossmember
11. Connect the oxygen sensor electrical connectors.
12. Connect the CPA retainers.
13. Install the clip around the engine harness and the oxygen sensor pigtail.