Chevrolet Trailblazer Questions

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would like to know what these codes mean
The alarm system keeps going off lights flashing alarms etc,,, Ive tried everything locking and unlocking with the key, disconnecting battery etc...
i think that this is danger for all suvs orcars that this happens to.
have to be cut out of mine it just got tighter when tried to pullon it to take over head
A video or step by step with pics would be extremely helpful. Keep failing emissions.
4.2 I6 code P1345 and cruise control does not work... I have replaced cam pos sensor, crank pos sensor and cam pos actuator, still have code P1345. I hooked a volt meter to cam pos actuator, got12+ volt immediately at start up. Drove it 30 miles city and highway, the voltage never changed, never dropped or toggled off. Any thoughts?
I had a mechanic put a used AC compressor in my 2004 Chevy Trailblazer. He put in 4 12 oz. cans of Freon but was later told it was to much and could in fact "blow the unit" How much is the correct amount that should be put in?
What could be causing this/how can I fix it
all the time.
want to clean the mass air flow sensor where is it located
sometimes steers fine sometimes wanders suspect steering rack leaking interanally
I already purchased the solenoid.
I had to pull the fuse out to get the blower motor off. it happens everytime I drive. I have to put the fuse back in to use the air.
I used the air one time and now there is a rattle, what could it be, fan clutch was replaced, new belts, dont know about this
There is nothing in third gear when shifted manually. Also the speedometer is not working. The shop thinks it is an electrical issue. I need some help, I have to have this vehicle for our business!!
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