Silhouette V6-3.4L VIN E (1996)
Refrigerant: Customer Interest
A/C - Insufficient Performance Using Front System Only
File In Section: 1 - HVAC
Bulletin No.: 63-12-07
Date: May, 1996
Subject:
Insufficient A/C Performance (with C34 - Rear A/C) When Using Front System Only (Add 1/4 lb R134a to System)
Models:
1996 Chevrolet Lumina APV
1996 Oldsmobile Silhouette
1996 Pontiac Trans Sport
with Rear A/C (RPO C34)
Built Prior to the following VIN Breakpoints:
Model
VIN Breakpoint
Lumina APV
117248
Silhouette
306374
Trans Sport
212925
Condition
Some owners of the above listed vehicles with the rear A/C option, RPO C34, may comment on insufficient air conditioning performance when using the
front system only.
Cause
This condition may be caused by refrigerant bleeding through the rear TXV and being captured in the rear evaporator and suction line. When this
happens, the front system is starved of refrigerant and results in poor air conditioning performance from the front system.
Correction
This condition may be corrected by adding an additional 1/4 lb (0.25 lb) R134a to the system for vehicles built prior to the above identified VIN
breakpoints. Vehicles built after these breakpoints will include the additional 1/4 lb (0.25 lb) charge.
Important:
Future service to the A/C system on any 1996 U Van should include the additional 1/4 lb (0.25 lb) charge.
Procedure
Recover the existing R134a, then evacuate and re-charge the system to include the additional 1/4 lb (0.25 lb).
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Labor Time
T2042
0.7 hr