Chevrolet Trailblazer Questions

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Check engine light on and theres oil in the #4 spark plug. Also runs like it isnt getting gas it cuts out till you get it going down the road. Not to mention sometime it wont automatic shift to next gear i have to let off the gas for it to finally shift.this vehicle needs help. We have gave it an plugs and wires.coil pack. Fresh oil changes. New brakes. Full freon. I just need this car fixed .any ideas??
What seems to make the problem better or worse? Gets warm seems like
How long have you had this problem? Since ive owned it. Got it from a buy here pay here
For the last three weeks, it takes my 2004 Chevy Trailblazer a few seconds of holding the ignition to start. I replaced the battery and no change.
How long have you had this problem? three weeks
The abs light along with a wrench symbol is periodically on my instrument panel . Does this mean that it needs maintenance or is it simply a reminder to get it checked??
I hear it unlock but will not onen handle lifts up but doed not open.
How long have you had this problem? just happened
All heater controls don't work the cruze control the speedometer don't work and most of the gauges don't work only one that works is the tack an oil gauge
Relays and fuses
Ran out of gas out two gallons and it will not start do I need too put more gallons in order for it too crank
Switch on dash in blower speeds 4&5 do not blow
Transmission fluid is a little low. One time I could not even back up got out let it set for a few went back out backed up fine
Noise goes up and down all the time
When driving the rear wheels lockup. A loud popping noise is heard. Rear wheels are then not spinning but being dragged. The problem occurred twice in 2016. The vehicle is parked not in use.
air conditioning will go from cold to hot when speed reaches 50 and when you slow back down it starts blowing cool again
was told that i had to buy the whole compressor. is this true, why cant i just replace the clutch and pulley?
Mph then it just revs up and barely goes I have already changed transmission fluid, all shifting solenoids, and the pressure switch manifold on's pulling up 4 codes that are C0455, C0244, U1064, U1026...any help would be greatly appreciate it.
I cannot find where the seat back opens to where I could change the seat belt so I'm not sure if I can change the belt or if I have to change the whole seat back.
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