I started off with a search but most were for GMT800s.
Just yesterday my 2009 Silverado 5.3 started throwing P0300 codes. The only real change that's happened recently is it's gotten quite hot out compared to when I got it over the spring. It's always had a bit of a stumble at idle, but nothing serious.
I noticed today going up a steep incline under load on the highway, the MIL was flashing.
Seems like there's a lot of potential answers for this code as well:
Bad spark plugs
Bad ignition coils
Fuel delivery problems
Crank Variation Relearn.
I was wondering if there's a better way to narrow this down without simply throwing parts at it or bringing it to the shop.
Any help would be appreciated.
2001 Chevy Silverado
Over the months I've noticed the AC getting warmer and warmer. Now it is barely colder than outside (which is about 100f).
Compressor cycles on/off; about 3 seconds on and 7 seconds off.
I have attached a recharge can to the low side plug. The gauge reads~100 PSI (truck is at ambient temp which is ~65f).
I have parts in the mail to convert my R12 manifold gauge to R134a connectors. I have no high side PSI value at this time.
With recharge can connected to low side valve and with the truck running with max ac (again ambient temp at 65f):
When the compressor engages, the low side gauge goes from 100 PSI to 5 PSI in a matter of 3 to 4 seconds. The compressor disengages.
At this time, the low side PSI slowly raises back up to 100 PSI which restarts the compressor shortly after and the cycle goes on...
Any takers on helping me or giving me possible causes (and what to do about them)?
I have a nagging suspicion that someone slapped a recharge can on it and overfilled it. This vehicle is driven by 5 different people; no one fessed up so far... Have to wait for parts to test high side PSI. But I'm also worried that the low side pressure dropped so fast; I feel this is not normal?
Thanks for the help!
A few days ago I turned the key to start my 2014 Silverado LTZ 4x4(51,000 miles), when it hit the accessory position my AC delco battery EXPLODED under my hood (spewing acid all over, the whole 9 yards). No, I don't have anything extra hooked to my battery at all. Anyway, this blew one of the main fuses coming directly off the battery in which I had to replace that entire fuse board. Bought a new battery, start the truck, radio screen not on. Found that little yellow blown fuse on the passenger side, fixed that. Now, for the life of me, I can not find the source of my last problem which is my A/C blower motor will not come on at all.All the lights come on the a/c controller by the radio. I figured it would be another fuse but the ones I checked were ok(maybe I'm missing one?). I stabbed a test light in the red wire going to the blower motor and its getting power. It would be hard for me to believe that the blower motor went bad since it was otherwise working fine before this battery failure. What am I missing? Thank you in advance.
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