Chevrolet Silverado / GMC Sierra. Service manual — part 149

Fig. 499: View Of Adapter & Swivel Base
Courtesy of GENERAL MOTORS CORP.

15. Select the adapter (2), as required, and install to the swivel base (1). Tighten until snug.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 500: View Of Swivel Base & Dial Indicator
Courtesy of GENERAL MOTORS CORP.

16. Install the indicator (2) to the swivel base (1). Tighten the clamp of the base until snug.

IMPORTANT: The clamp of the swivel base and the shaft of the indicator

should be free of oil or other debris. A loose or improperly
clamped indicator may indicate incorrect readings.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 501: View Of Swivel Base & Oil Pan Rail
Courtesy of GENERAL MOTORS CORP.

17. Install the swivel base (1) to the oil pan rail of the engine block. Tighten until snug.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 502: Swivel Base Locking Lever
Courtesy of GENERAL MOTORS CORP.

18. Adjust the swivel base as required and position the indicator tip slightly above the

connecting rod cap. Lock the swivel base in position by rotating the locking lever (1). Do
not allow the tip of the indicator to contact the connecting rod at this time.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado