Compressor Replacement

Important

^ Compressor related noise is generally A/C system related and not always the compressor itself. Prior to replacing compressor, refer to "Air Conditioning System Noise Diagnosis."

Remove or Disconnect

1. Recover refrigerant. Refer to "Refrigerant Recovery and Recycling, Adding Oil, Evacuating and Recharging Procedures."
2. Raise and suitably support vehicle.
3. Serpentine drive belt and tensioner.
4. Bolt/screw (30).
5. Bolt/screw (28).
6. Hose (7) from compressor (2).
^ Discard seals (18).
7. Transmission oil cooler pipes at engine, if necessary.
8. Bolt/screw (41).
9. Bolts/screws (38).
10. Electrical connector and compressor (2).
11. Bolt/screw (39) and bracket (40), if necessary.

Install or Connect

1. Polyalkaline glycol (PAG) refrigerant oil.
^ If compressor (2) is being replaced, drain refrigerant oil from both defective compressor and new replacement compressor. Measure amount removed from defective compressor. If measured amount is less than 30 ml (1 fluid ounce), add 60 ml (2 fluid ounces) to new replacement compressor. If more that 30 ml (1 fluid ounce) is drained from defective compressor add same amount to new compressor. Use PAG refrigerant oil GM P/N 12345923 or equivalent.
2. Bracket (40) and bolt/screw (39), if removed.

Tighten

^ Bolt/screw (39) to 25 N.m (18 lb. ft.).

3. Compressor (2).
4. Bolts/screws (38).

Tighten

^ Bolts/screws (38) to 50 N.m (37 lb. ft.).

5. Bolt/screw (41).

Tighten

^ Bolt/screw (41) to 33 N.m (24 lb. ft.).

6. Electrical connector at compressor (2).
7. Transmission oil cooler pipes at engine, if necessary.
8. Seals (18) to hose (7).
^ Lightly coat seals with mineral base 525 viscosity refrigerant oil.
9. Hose (7) to compressor (2).
10. Bolt/screw (28).

Tighten

^ Bolt/screw (28) to 33 N.m (24 lb. ft.).

11. Bolt/screw (30).

Tighten

^ Bolt/screw (30) to 10 N.m (89 lb. in.).

12. Serpentine drive belt and tensioner.
13. Lower vehicle.
14. Charge A/C system. Refer to "Refrigerant Recovery and Recycling, Adding Oil, Evacuating and Recharging Procedures."
15. Leak-test A/C system. Refer to "Leak-Testing the Refrigeration System."

Image Legend

1 MODULE, HEATER AND AIR CONDITIONING EVAPORATOR

2 COMPRESSOR, AIR CONDITIONING

3 CONDENSER, AIR CONDITIONING

4 RECEIVER AND DEHYDRATOR, AIR CONDITIONING

5 EVAPORATOR, AIR CONDITIONING

6 VALVE, AIR CONDITIONING THERMOSTATIC EXPANSION

7 HOSE, AIR CONDITIONING COMPRESSOR AND CONDENSER

8 TUBE, AIR CONDITIONING RECEIVED DEHYDRATOR

9 TUBE, AIR CONDITIONING RECEIVER DEHYDRATOR

10 BRACKET, AIR CONDITIONING RECEIVER DEHYDRATOR

11 BOLT/SCREW, AIR CONDITIONING RECEIVER DEHYDRATOR CLAMP

12 BOLT/SCREW, AIR CONDITIONING RECEIVER DEHYDRATOR BRACKET

13 O-RING, AIR CONDITIONING RECEIVER DEHYDRATOR TUBE

14 O-RING, AIR CONDITIONING EVAPORATOR TUBE

15 SEAL, AIR CONDITIONING EVAPORATOR TUBE

16 SEAL, AIR CONDITIONING COMPRESSOR AND CONDENSER HOSE

17 O-RING, AIR CONDITIONING CONDENSER FITTING

18 SEAL, AIR CONDITIONING COMPRESSOR HOSE

20 O-RING, AIR CONDITIONING REFRIGERANT PRESSURE SENSOR

21 VALVE, AIR CONDITIONING REFRIGERANT PRESSURE SENSOR

22 SENSOR, AIR CONDITIONING REFRIGERANT PRESSURE

23 CORE, AIR CONDITIONING REFRIGERANT SERVICE VALVE

26 GAP, AIR CONDITIONING REFRIGERANT CHARGE VALVE

27 BOLT/SCREW, AIR CONDITIONING RECEIVER DEHYDRATOR TUBE

28 BOLT/SCREW, AIR CONDITIONING COMPRESSOR AND CONDENSER HOSE

29 BOLT/SCREW, AIR CONDITIONING THERMOSTATIC EXPANSION VALVE

30 BOLT/SCREW, AIR CONDITIONING COMPRESSOR AND CONDENSER HOSE CLIP BRACKET

32 BRACKET, AIR CONDITIONING COMPRESSOR HOSE CLIP

33 RETAINER, RADIATOR AIR UPPER BAFFLE

34 STRAP, AIR CONDITIONING COMPRESSOR AND CONDENSER HOSE

38 BOLT/SCREW, AIR CONDITIONING COMPRESSOR

42 GASKET, EVAPORATOR BLOCK