A/C - Does Not Cool or Coolant Leak at Vehicle Rear

File In Section: 1 - HVAC

Bulletin No.: 66-12-07

Date: October, 1996

Subject:
Air Conditioning Does Not Cool/Dex-Cool Leak at Rear of Van/Engine Overheat (Repair Rear HVAC System Liquid Lines)

Models:
1996 Chevrolet and GMC G Van Models (Plant VIN Code 1)
with Rear Heater and Rear Air Conditioning (RPOs C36 & C69)

Condition

An owner may report that the air conditioning does not deliver cold air and/or engine Dex-Cool to the rear heater is observed leaking on the ground behind the left rear tire or the engine overheats.

Cause





The rear HVAC liquid lines may be leaking. The leak is due to improper line orientation (twisted or one on top of the other) in the area shown in Figure 1, causing the lines to chafe against one another or against the left rear spring shackle bolt.

Correction

Repair the HVAC Liquid Lines using Kent-Moore Repair Kit J 41425 following the service procedures described in Sections 1A and 1B of the Service Manual. When reinstalling the lines, they should be oriented so that they do not make contact with one another and there is adequate clearance to the spring shackle bolt.

Warranty information

For vehicles repaired under warranty, use:

Labor Operation Description Labor Time

D2737 Pipe(s), Heater - Replace Use Published Labor
D3093 Lines, Refrigerant - Replace Operation Time
Front to Rear Unit

Important:
Labor operation is coded to base vehicle coverage in the warranty system.