Chevrolet Silverado / GMC Sierra. Service manual — part 178

15. Install the NEW spacer rings (513), flat washers, into the fuel meter body.

16. Install the NEW fuel seals (512), yellow O-rings, into the fuel meter body.

17. Install the NEW fuel seal retainers (511) into the fuel meter body.

18. Install the fuel pipe plug (750), if required.

19. Install the fuel pipe (749) into the fuel meter body.

20. Install the fuel pipe retainer bracket (753) onto the fuel pipe.

21. Install the fuel pipe retainer bracket nuts (510).

22. If reusing the fastener, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or

equivalent, to the threads of the fuel pipe bolt.

23. Install the fuel service port cap (751) and schrader valve (752), if required.

24. Install the fuel pipe bolt (509).

Tighten:

1. Tighten the fuel pipe bracket nuts to 3 N.m (27 lb in).

2. Tighten the fuel pipe bolt to 6 N.m (53 lb in).

IMPORTANT: Make sure to properly align the fuel line retainer flanges (1)

to face downward towards the fuel meter body, and that
flanges rest on the shoulders of the fuel plug and the fuel
line. Failure to do so may cause the fuel plug and the fuel
line to come out of the fuel meter body, resulting in fuel
spillage.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 593: MAP Sensor
Courtesy of GENERAL MOTORS CORP.

25. Install a NEW manifold absolute pressure (MAP) sensor seal onto the MAP sensor.

26. Apply a small amount, approximately 1 drop, of clean engine oil to the MAP sensor seal.

27. Install the MAP sensor into the upper intake manifold.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 594: View Of Studs And Ignition Coil
Courtesy of GENERAL MOTORS CORP.

28. Install the ignition coil and studs.

Tighten: Tighten the ignition coil studs to 12 N.m (106 lb in).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 595: ECT Sensor & Plug
Courtesy of GENERAL MOTORS CORP.

29. If reusing the engine coolant temperature (ECT) sensor plug (1) or the ECT sensor (2), if

equipped, apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the
threads of the ECT sensor plug (1) or the ECT sensor (2).

30. Install the ECT sensor or plug, if equipped, into the front of the lower intake manifold.

Tighten: Tighten the ECT sensor or plug to 20 N.m (15 lb ft).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado