you dont nid to change it is the same a/c is controled by the front control turn front on and turn rear on
The AC recharge port on a 2004 GMC envoy is on the low pressure connection. It is the larger of two hoses near the firewall.
take it to a dealer.
Where id the AC expancion valve located in a 202 gmc yukon with rear air
According to the 07 Refrigerant Oil Specifications an 99 GMC Yukon uses either 36 or 64 oz of refrigerant depending if the vehicle has rear ac. You can find more helpfull information about your vehicle ac system at www.idqusa.com.
If 1993 suburban rear ac not cold how can check the expansion valve?
If it is a factory ac the front and rear use the same ports. It just takes more freon for one with dual units
The low side service port to recharge the AC on a 1997 Olds Cutlass Supreme is at the rear of the engine. It is close to the firewall.
It is located on the accumulator/dryer. It should have a black cap on it, and if you buy a recharge kit, the hose will only fit on this connection (it won't fit on the high pressure connector, which is next to the evaporator). This is the only connector used to fill the AC system, even if you have a conversion van with rear ac.
either located on the firewall or one of the ac hoses
You will need to replace the rear expansion block valve and the recharge the system with freon and oil..............
Using the proper type of freon and a gauge, connect to the low side ac port. With the engine running and the ac on high, add freon till the gauge shows full.