Chevrolet Silverado / GMC Sierra. Service manual — part 173

Fig. 576: View Of Throttle Body & Gasket
Courtesy of GENERAL MOTORS CORP.

3. Remove the throttle body.

4. Remove the throttle body to upper intake manifold gasket.

5. Discard the throttle body to upper intake manifold gasket.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 577: Engine Coolant Thermostat
Courtesy of GENERAL MOTORS CORP.

6. Remove the water outlet studs.

7. Remove the water outlet (309).

8. Remove the engine coolant thermostat.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 578: ECT Sensor & Plug
Courtesy of GENERAL MOTORS CORP.

9. Remove the engine coolant temperature (ECT) sensor plug (1) or the ECT sensor (2) from

the front of the lower intake manifold, if equipped.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 579: View Of Studs And Ignition Coil
Courtesy of GENERAL MOTORS CORP.

10. Remove the studs and the ignition coil.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado