A/C - Stops Blowing Cold Air/Cycles ON and OFF

File In Section: 01 - HVAC

Bulletin No.: 02-01-39-006A

Date: May, 2003

INFORMATION

Subject:
Diagnosing Poor A/C Performance - A/C Stops Blowing Cold, A/C Cycles On and Off

Models:
2002-2003 Chevrolet TrailBlazer EXT
2002-2003 GMC Envoy XL
with Automatic or Manual HVAC Auxiliary Temperature Control (RPOs CJ2 or CJ3)

This bulletin is being revised to include the underhood label part number. Please discard Corporate Bulletin Number 02-01-39-006 (Section 01 - HVAC).

Some of the above listed vehicles may exhibit poor A/C performance due to an overcharged system. If the A/C system is overcharged, it may cause the A/C to stop blowing cold after extended idle or while driving in slow traffic at high ambient temperatures.

It has been found that the underhood label containing the A/C charge specification is incorrect. The correct specification should read System Charge with Front and Rear -1.20 kg (2.65 lbs) Use this new charge specification whenever the A/C system is serviced. Install new label, P/N 15103173.





Parts Information

Parts are currently available from GMSPO.





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