Test Description Cadillac Escalade GMT800

The number(s) below refer to the step(s) in the diagnostic table.

Scheme 78

1. 2. This inspection is to verify that the drive belt(s) is correctly installed on all of the accessory drive pulleys. Wear on the drive belt(s) may be caused by mis-positioning the drive belt(s) by one or more grooves on a pulley(s).
2. 3. The installation of a drive belt(s) that is too wide or too narrow will cause wear on the drive belt(s). The drive belt(s) ribs should match all of the grooves on the pulleys.
3. 4. This inspection is to verify that the drive belt(s) is not contacting any part of the engine or body while the engine is operating. There should be sufficient clearance when the accessory drive components load varies. The drive belt(s) should not come in contact with an engine or a body component when snapping the throttle.

Scheme 79

Note. Allowing the drive belt tensioner to snap into the free position may result in damage to the tensioner.

Important: When the engine is operating the drive belt tensioner arm will move. Do not replace the drive belt tensioner because of movement in the drive belt tensioner arm.

1. Remove the drive belt. Refer to «DRIVE BELT REPLACEMENT - ACCESSORY»(ref-180687-S16348846492005072800000) or «DRIVE BELT REPLACEMENT - AIR CONDITIONING»(ref-180687-S04744969302005072800000) .
2. Move the drive belt tensioner through its full travel. The movement should feel smooth. There should be no binding. The tensioner should return freely.
3. If any binding is observed, replace the drive belt tensioner. Refer to «DRIVE BELT TENSIONER REPLACEMENT - ACCESSORY»(ref-180687-S30455948342005072800000) or «DRIVE BELT TENSIONER REPLACEMENT - AIR CONDITIONING»(ref-180687-S07168112962005072800000) .
4. Install the drive belt. Refer to of «DRIVE BELT REPLACEMENT - ACCESSORY»(ref-180687-S16348846492005072800000) or «DRIVE BELT REPLACEMENT - AIR CONDITIONING»(ref-180687-S04744969302005072800000) .

Scheme 80

Scheme 81

1. Loosen the air cleaner outlet duct clamps at the following locations: The throttle body The mass airflow/intake air temperature (MAF/IAT) sensor
2. Disconnect the radiator inlet hose clip from the outlet duct.
3. Remove the air cleaner outlet duct.
4. Install a breaker bar with hex-head socket to the drive belt tensioner bolt.
5. Rotate the drive belt tensioner clockwise in order to relieve tension on the belt (1).
6. Remove the belt (1) from the pulleys and the drive belt tensioner.
7. Slowly release the tension on the drive belt tensioner.
8. Remove the breaker bar and socket and from the drive belt tensioner bolt.
9. Clean and inspect the belt surfaces of all the pulleys.

Scheme 82

Scheme 83

Scheme 84

1. Route the drive belt (1) around all the pulleys except the idler pulley.
2. Install the breaker bar with hex-head socket to the belt tensioner bolt.
3. Rotate the belt tensioner clockwise in order to relieve the tension on the tensioner.
4. Install the drive belt (1) under the idler pulley.
5. Slowly release the tension on the belt tensioner.
6. Remove the breaker bar and socket from the belt tensioner bolt.
7. Inspect the drive belt (1) for proper installation and alignment.
8. Align the arrow (2) at the throttle body end of the duct with the throttle body attaching stud (1).
9. Install the air cleaner outlet duct.
10. Connect the radiator inlet hose clip to the outlet duct. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
11. Tighten the air cleaner outlet duct clamp screws at the following locations: The throttle body The MAF/IAT sensor Tighten Tighten the screws to 7 N.m (62 lb in).

Scheme 85

Scheme 86

1. Remove the accessory drive belt. Refer to «DRIVE BELT REPLACEMENT - ACCESSORY»(ref-180687-S16348846492005072800000) .
2. Raise and suitably support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-180627-S40085739202005072800000) in General Information.
3. Remove the engine shield bolts.
4. Remove the engine shield.
5. Install a ratchet into the air conditioning (A/C) belt tensioner adapter opening.
6. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt.
7. Remove the A/C belt from the pulleys.
8. Slowly release the tension on the A/C belt tensioner.
9. Remove the ratchet from the A/C belt tensioner.
10. Clean and inspect the belt surfaces of all the pulleys.

Scheme 87

Scheme 88

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 shield. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
10. Install the engine shield bolts. Tighten Tighten the bolts to 20 N.m (15 lb ft).
11. Lower the vehicle.
12. Install the accessory drive belt. Refer to «DRIVE BELT REPLACEMENT - ACCESSORY»(ref-180687-S16348846492005072800000) .

Scheme 89

1. Loosen the drive belt idler pulley bolt.
2. Remove the accessory drive belt. Refer to «DRIVE BELT REPLACEMENT - ACCESSORY»(ref-180687-S16348846492005072800000) .
3. Remove the drive belt idler pulley and bolt.

Scheme 90

1. Install the drive belt idler pulley and bolt to the generator bracket. Snug the bolt finger tight.
2. Install the drive belt. Refer to «DRIVE BELT REPLACEMENT - ACCESSORY»(ref-180687-S16348846492005072800000) . NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
3. Tighten the drive belt idler pulley bolt. Tighten Tighten the bolt to 50 N.m (37 lb ft).

Scheme 91

1. Remove the accessory drive belt. Refer to «DRIVE BELT REPLACEMENT - ACCESSORY»(ref-180687-S16348846492005072800000) .
2. Remove the drive belt tensioner bolts.
3. Remove the drive belt tensioner.

Scheme 92

1. Install the drive belt tensioner.
2. Install the drive belt tensioner bolts. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
3. Tighten the drive belt tensioner bolts. Tighten Tighten the bolts to 50 N.m (37 lb ft).
4. Install the accessory drive belt. Refer to «DRIVE BELT REPLACEMENT - ACCESSORY»(ref-180687-S16348846492005072800000) .

Scheme 93

1. Remove the air conditioning (A/C) drive belt. Refer to «DRIVE BELT REPLACEMENT - AIR CONDITIONING»(ref-180687-S04744969302005072800000) .
2. Remove the A/C belt tensioner bolts.
3. Remove the A/C belt tensioner.

Scheme 94

1. Install the A/C belt tensioner. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
2. Install the A/C belt tensioner bolts. Tighten Tighten the bolts to 50 N.m (37 lb ft)
3. Install the A/C drive belt. Refer to «DRIVE BELT REPLACEMENT - AIR CONDITIONING»(ref-180687-S04744969302005072800000) .