Why does my GMC air conditioner not work?
Why does my GMC air conditioner not work?
GM air conditioning problems are caused by condensers and discharge lines, at least according to a proposed class-action lawsuit that includes the following long list of Cadillac, Chevy and GMC trucks and SUVs. This problem has popped up in the following GMC generations. Most years within a generation share the same parts and manufacturing process.
Where is the clutch cycling switch on an AC AC?
The clutch cycling switch measures A/C pressure near the evaporator outlet, and is often mounted on the accumulator. If the incorrect pressure is sensed, the switch will open the A/C compressor clutch circuit to prevent operation.
Why does my GMC Sierra have a leak?
Just a thought…. 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak…… They use the same part on many cars. From Chevy’s to VW’s. Chick, i have a 1997 GMC Sierra K1500 with a 5.7L that has the same problem.
How to replace the condenser on a GM Truck?
Perhaps it would help to speak directly with sales at Rockauto. Have your Vin # ready and they can determine the parts you need. measured the orifice tube and ordered a new one. Also new drier and o ring set. Thx for the information. Could someone confirm that you don’t have to remove the radiator to renew the condenser?
How to repair GMC CK Series truck HVAC unit?
Use paper clips or wires to jumper across the switch connectors on the wire harness. Key on engine off, compressor clutch should “click”. If no click, check the wiring harness for open wires, functioning high pressure switch, and correct voltages. TESTING LOW PRESSURE SWITCH. With the truck running, A/C turned on.
Where is the AC relay located on a GMC CK?
The AC Relay is located external to the controller. The coil of the AC relay is powered from the ECU, located on the left side of the engine bay. The High Pressure, Cycling, and Lo pressure refrigerant switches also go to the ECU. When all conditions are met, the ECU provides power to the AC relay coil, and the AC compressor clutch is energized.
What does switched + 12v do on a GMC CK?
The purpose of Switched +12V is to prevent the AC compressor from running when the blower is not running. Without the blower the evaporator and AC lines could ice up. It is a mystery why GM / AC Delco decided to disable all other functions such as Mode and Recirculation doors when the blower is not running.
How can I tell if my camshaft sensor is failing?
If your vehicle idles roughly, stalls frequently, has a drop in engine power, stumbles frequently, has reduced gas mileage, or accelerates slowly, these are all signs your camshaft position sensor could be failing.
