The a/c compressor cycles on and off repeatedly even when the a/c switch is turned off, (and not in defrost mode ) , the only way I can get it to stop cycling is to turn the blower fan switch to the off position...
I had the same problem on my 95. Do you hear it clicking on then off all the time. Well thats what I had. I unpluged the plug at the top of the compressor for about 6 months, got sick of hearing it. I had my system recharged and the problem stoped. I no thats not alot of help, but thats what happend to me. Good luck
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Make sure you are even getting power through your a.c. switch on the console. That sends power to the main relay and through the high pressure and Low pressure switch in series and then to your compressor clutch. Trace power through all of these and you will know which component is faulty.
It would be nice if you were to mention WHICH ENGINE your Silverado is equipped with...Knowing WHICH Silverado MODEL you have would also be nice...1500, 2500, 2500HD, 3500. etc.
If it is a gas engine, all you should have to do is to cycle the ignition key ON for about 5 seconds, then turn the ignition switch OFF and wait about 30 seconds, then repeat this about 3 times. This will allow the fuel pump prime to get the air out of the fuel lines. It should start after this is done.
If your truck is equipped with a diesel engine, the process is much different, let me know if this is the case, and I will post the fuel filter replacement instructions for the diesel.
It sounds like the computer is compensating the idle when the a/c compressor cycles on. The compressor cycles on and off when the a/c is on, which is normal. When the compressor kicks on, it puts an additional load on the engine, which in turn lowers the idle, especially at idle sitting at, say, a red light. Having the brakes on also adds another load to the engine as it uses a lot of engine vacuum to keep the brakes applied. When the engine surges, like your describing, that is the trucks computer sensing the additional load put on the engine, and is adjusting the idle higher to compensate for it. Theres really not a lot you can do about it, unless maybe switch off the a/c at red lights. I should add that if it's a severe "lunge" or surge, enough that your fighting to keep the truck from moving, I would check for maybe a vacuum leak, or even possibly take the truck to a dealer and have it checked over. Hope this helps.
if its a new body style (with the round front - i am assuming because it has a 5.3) then it takes 2.0lbs (.91kg). Make sure you check your fan clutch to see if it spins freely or has some drag to it. the fan clutches usually fail causing the compressors to come apart, the failed ones spin freely.
This only happens if the key is in the on/run position, right? It might be related to the climate control. If you move the vent selection from cold to hot does it stop. Don't turn or more everything at once. It will mess up finding the source of the problem.
There isn't a torque spec since those bearing are pre-loaded. You place the unit on a good known vic and get a breaker bar and you might even have to put an extention on that and you begin to tighten unitil you fell the bearing start to load...a little extra short turn wouldn't hurt at that point.