V 3500 P/U 4WD V8-350 5.7L (1989)
![background image](/gmc/v_3500_p/u_4wd/v8-350_5.7l/Page-1686002.png)
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The valve cavity to remove any dust or dirt before installing a new seal.
Install or Connect
1. Seal (57) to the compressor
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Dip the seal (57) in 525 viscosity refrigerant oil.
2. Valve (56) to the compressor
Tighten
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Valve (56) to 19 N.m (14 ft. lbs.).