Chevrolet Silverado / GMC Sierra. Service manual — part 242

Fig. 24: A/C Belt Tensioner
Courtesy of GENERAL MOTORS CORP.

4. Install a ratchet into the air conditioning (A/C) belt tensioner adapter opening.

5. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt.

6. Remove the A/C belt from the pulleys.

7. Slowly release the tension on the A/C belt tensioner.

8. Remove the ratchet from the A/C belt tensioner.

9. Clean and inspect the belt surfaces of all the pulleys.

Installation Procedure

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 25: A/C Belt Tensioner
Courtesy of GENERAL MOTORS CORP.

1. Install the A/C belt around the crankshaft balancer.

2. Install a ratchet into the A/C drive belt tensioner adapter opening.

3. Rotate the A/C belt tensioner clockwise in order to relieve tension on the tensioner.

4. Install the A/C belt over the idler pulley.

5. Install the A/C belt around the A/C compressor pulley.

6. Slowly release the tension on the A/C belt tensioner.

7. Remove the ratchet from the A/C belt tensioner.

8. Inspect the A/C belt for proper installation and alignment.

9. Install the engine protection shield. Refer to Engine Protection Shield Replacement .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 26: Drive Belt Routing
Courtesy of GENERAL MOTORS CORP.

10. Install the engine shield bolts.

Tighten: Tighten the engine shield bolts to 20 N.m (15 lb ft).

11. Lower the vehicle.

NOTE:

Refer to Fastener Notice .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

12. Install the accessory drive belt. Refer to Drive Belt Replacement - Accessory.

DRIVE BELT IDLER PULLEY REPLACEMENT

Removal Procedure

Fig. 27: View Of Drive Belt Idler Pulley
Courtesy of GENERAL MOTORS CORP.

1. Loosen the drive belt idler pulley bolt.

2. Remove the accessory drive belt. Refer to Drive Belt Replacement - Accessory.

3. Remove the drive belt idler pulley and bolt.

Installation Procedure

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2