gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Expansion Valve > < Expansion Block/Orifice Tube|Service and Repair
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1. Use the J 26549-E in order to install the expansion (orifice) tube.

IMPORTANT:  Install the shorter screen end of the expansion (orifice) tube into the evaporator first.

2. Install the new O-ring seal.
3. Install the evaporator tube to the evaporator.

NOTE:  Refer to Fastener Notice in Service Precautions.

Tighten
Tighten the evaporator tube nut to 28 N.m (20 lb ft).

4. Evacuate and recharge the system.
5. Leak test the fittings of the component using the J 39400-A.
6. Install the air cleaner. 

Expansion Valve > < Expansion Block/Orifice Tube|Service and Repair