File In Section: 01 - HVAC
Bulletin No.: 01-01-39-002B
Date: December, 2001
This bulletin is being revised to add additional procedure information. Please discard Corporate Bulletin Number 01-01-39-002A (Section 01 - HVAC).
Some customers may comment on excessive noise from the engine compartment with the A/C on. Some customers also may comment that the A/C system is inoperative.
Under certain driving conditions, the A/C compressor may be starved of oil.
Front/Rear (Dual Circuit) A/C Systems
Flushing Configuration - Forward Flush Forward
Flushing (the same flow as normal system operation) is recommended for contaminated refrigerant or PAG oil.
Flushing Configuration - Reverse Flush
Reverse flushing (the opposite flow of normal operation) is recommended for desiccant bag failure. Always replace the accumulator after the reverse flushing procedure is complete.
Parts are currently available from GMSPO.
For vehicles repaired under warranty, use the table as shown.