OEM 2009 Chevrolet Trailblazer A/C Hose

2009 Chevrolet Trailblazer Parts Questions & Experts Answers

• Q: How to replace the A/C Hose for the Air Conditioning Compressor (LL8) (4.2L) on 2009 Chevrolet Trailblazer?

  A: The first step to replace the air conditioning compressor hose (LL8) (4.2L) should be a refrigerant recovery procedure. Start by detaching the compressor hose assembly from the compressor through the removal of its assembly nut followed by the uninstalling of the sealing washers. The first step requires removal of the compressor suction hose nut from the accumulator and its suction hose and the o-ring seal. To install the compressor discharge hose to the condenser follow these steps: first remove the bolt from the lift bracket along with the nut from the engine stud and next take off the compressor discharge hose from the condenser and the nut from the compressor hose connection in the driver wheel opening while removing o-ring seals and capping or plugging all open connections. New o-ring seals need installation before securing the compressor discharge hose onto the condenser through a 28 nm (21 lb ft) hose nut. Fasten the compressor hose connection through the driver wheel opening by tightening its nut to 48 nm (35 lb ft). The suction hose of the compressor should connect to the engine stud followed by nut tightening until it reaches 48 nm (35 lb ft) while attaching the suction hose to the engine lift bracket and tightening the bolt to 48 nm (35 lb ft). Install the compressor suction hose to the accumulator while torquing the nut to a 48 nm (35 lb ft) value followed by washer installation. Screw the compressor hose assembly to the compressor while using washers followed by installation of the retaining nut which should be tightened to 33 nm (24 lb ft). The last step includes evacuating and recharging the a/c system followed by a leak test of the fittings through use of the j 39400-a halogen leak detector.