4812852 Discharge Hose

The 2014-2016 Chevrolet Silverado, 2015-2016 Chevrolet Suburban, Chevrolet Tahoe, 2015-2016 Cadillac Escalade, 2014-2016 GMC Sierra & Sierra Denali , 2015 & 2016 GMC Yukon & Yukon Denali are fitted with a new style 7SAS17C control valve compressor. These are different from the 10S20F style we have been used too on earlier 2000-2014 GM trucks.
 
While there is a totally different procedure with diagnosing control valve compressors (refer to gpd tech tip #9), these specific vehicles have an issue with the OE discharge line.

Currently, the OE discharge line is experiencing difficulties and is cracking due to vibration at the bend of the hose. The OE repair is to replace the discharge line with Delco #15-34651, which has been modified, and to add a clamp between the new discharge line and the suction line (GM #23264893)

gpd has redesigned the discharge hose (gpd #4812852) to make it more durable and will not interfere with other components of the system.  Instead of aluminum, gpd uses steel. The hose is a direct replacement that will not require any brackets or modifications to the original design.
 

​Ensure the system is clean and free of  debris. Ensure that the new sealing washers are used on the suction line before fitting the discharge line with new sealing washes on top. These can be found in the rapid seal kit #1321337.

​Place gpd discharge hose #4812852 on top of the suction hose. As these are held down with only one bolt, ensure they interlink correctly and tighten bolt using manufacturer’s specifications.

gpd has retained the muffler to keep the system quiet. Use either the old transducer from the old discharge line or if damaged, use gpd transducer #1711513 on the new discharge line.

Remove the cap on the port located on the muffler. Screw on the transducer and connect the electrical plug.

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