Problem with my 2004 Chevy Silverado
5.3 V8
GM Computer codes = tool wont read
New tires no engine work
Repairs this problem = tried disconnecting battery.
GM tech = jk
question = 2004 chevy Silverado 5.3 v8 starts and immediately stalls. When given gas doesn't even
turn over. Radio wont work but all dash lights work. Diagnostic tool wont read anything. But truck reads
unknown driver. Tried disconnecting battery did nothing. Please help. I
wish I could donate but i just
spent my last 11 dollars on gas so i could get friend with broken truck to work.
This info is detailed
enough because its all the info he gave me. But if you need more just ask and ill ask him.


JK:
All these things may be related, or not. Be sure to check that the battery cable are tight.
For the scan tool not powering up, check the cigar lighter fuse. Is either in the underhood fuse block,
or the drivers side dash fuse block. This fuse powers the diagnostic connector under the dash.
In fact, be sure to
check all fuses.
Starting then stalling could be a security system problem. The security / theft light would come on the
dash after trying to start then stall.
Fuel pressure is another thing to check.
As you can see, requires some diagnostics of these different systems to see if all related or  not.
2007 Silverado.
Question = I have a knocking sound that repeats about 2 times every minute when the defroster is on and the fan is
running but no other time.
Answer: That is the sound of the A/C compressor kicking on and
off. The compressor runs when you have the defroster going, as
well as when the air is on. This is a normal condition and nothing
to worry about. If the noise seems odd, or unusually loud, you
could have a compressor that is going bad or about to lock up.
Check the belt too, on your vehicle there is a separate drive belt
that turns the compressor. Probably normal, but get it checked
out if it seems like something is wrong.