GM 22759527
A/C Tube, Front

The first step to replace the air conditioning evaporator front tube requires recovering refrigerant from the a/c system and battery removal. First remove the a/c tube connector which is at the evaporator rear line assembly then unplug the refrigerant pressure sensor electrical connector and front evaporator inlet line from its body retaining clip. Support the vehicle before removing the front evaporator inlet line to A/C Condenser lower bolt while using immediate caps or tapes on the open a/c components to avoid contamination. The front evaporator line inlet connecting to the A/C Condenser requires separation followed by sealing washer dismissal and A/C Condenser sealing with caps or tape. Lower the vehicle while disconnecting the front evaporator inlet line from the evaporator rear line assembly for removal of o-rings then capping or taping the evaporator rear line assembly. The front evaporator inlet line must be removed from the vehicle only after unplugging the surge tank outlet hose and inlet heater hose from their mounting points located on the underhood junction box retainer clip. You must first attach the front evaporator inlet line to the vehicle before you join the surge tank outlet hose and inlet heater hose with the underhood junction box retainer clip. Disassemble the tape or cap from the evaporator rear line assembly then implement fresh o-rings before linking the front evaporator inlet line to the rear evaporator line assembly. After elevating the vehicle again, users should remove the cover from the A/C Condenser before inserting a new sealing washer to the front evaporator inlet line and attaching this line to the A/C Condenser. Tighten the front evaporator inlet line to A/C Condenser lower bolt until it reaches 16 n.m (12 lb ft). Lower the vehicle and join the front evaporator inletellowing by the clip. Add the refrigerant pressure sensor electricity wire and the a/c tube wiring at the evaporator rear line assembly. The service procedure ends by installing the battery followed by evacuating and recharging the a/c system while using the halogen leak detector (J 39400-A) to inspect the component fittings.

The first step to install a new air conditioning evaporator front tube is to extract refrigerant from the a/c system. Discharge the battery power after detaching the a/c tube connector at the evaporator rear line assembly. The distributer of the front evaporator inlet line needs disconnection from the body retaining clip as well as from the refrigerant pressure sensor electrical connector . Raise and support the vehicle before removing the front evaporator inlet line to A/C Condenser lower bolt but ensure to cap or tape open a/c components to avoid contamination. Use hacksaw pliers to disconnect front evaporator line inlet from A/C Condenser then remove washing seal then tape up or apply a cap on the open A/C Condenser. Lower the vehicle while you disconnect the front evaporator inlet line from the evaporator rear line assembly and discard the o-rings by capping or taping the evaporator rear line assembly. The front evaporator inlet line removal requires you to disconnect surge tank outlet hose and inlet heater hose from the underhood junction box retainer clip. To set up the front evaporator inlet line users must first attach it to the vehicle then connect surge tank outlet hose and inlet heater hose at the underhood junction box retainer clip. Apply new o-rings on the rear evaporator line assembly and then remove the front evaporator rear-line assembly cap or tape. Raise the vehicle after joining the evaporator rear line assembly to the front evaporator inlet line and then remove the cap or tape from the A/C Condenser. The front evaporator inlet line requires a new sealing washer before connection to the A/C Condenser which must be tightened to 16 nm (12 lb ft). Lower the vehicle position and connect the front evaporator inlet line to the body retaining clip and at the same time install the refrigerant pressure sensor electrical connector . Before rehanging the battery the a/c tube connector installation will take place at the evaporator rear line assembly followed by an evacuation-charging process and leak test of component fittings using j 39400-a.

Remove the A/C compressor hose assembly bolt from the A/C condenser fitting and disconnect the hose assembly from the fitting, discarding the sealing washer.

Remove the battery and then the intake manifold.

Install new seal washers to the evaporator rear line assembly.

Remove the front evaporator inlet line to A/C condenser lower bolt and cap or tape the open A/C components to prevent contamination.

Connect the hose assembly to the A/C compressor and secure it with the retaining bolt, tightening it to 20 N.m (15 lb ft).

Remove the battery and intake manifold.

First, recover the refrigerant from the A/C system.

Connect it to the retainer bracket stud and the TXV, install the TXV block fitting nut and tighten it to 20 N.m (15 lb ft), then install the heater pipe bracket retaining nut and tighten it to 10 N.m (7 lb ft).