2001 Chevrolet Suburban 1500 Questions

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I originally had trouble shifting into park but now I've realized the shifter physically goes into park and the vehicle won't move as if it's in park but my dash is showing I'm in reverse. I know I should be able to start it in neutral but I can't even do that. I'm deperate for help my job depends on this truck running.
I have a 2001 suburban my battery light is on lost my wipers ac 4x4 odomiter fuel gauge thermastat
Also washed tank and wiped clean
Now it won't idle on its own .what next?
I fixed a problem and my check engine light went off. I drove my truck for approximately 30 miles and it cleared all errors from the ECM. I took it to a star station for smog and everything passed except my cat conv B1 failed due to it being the wrong part for my engine family. I drove it home and parked it. I then made an appointment with the smog referee.

11 days later I started it right up and drove it to get checked out by the referee and they authorized the cat conv B1 due to it being a valid part at time it was replaced. This part was rescinded after the replacement thus why it failed but the referee authorized it for use. yet.................

my suburban failed due to the OB computer system has not completed the emission's self checks.
Result: OBD II not ready

How can this be possible?
OBD II passed the first smog on November 9, 2017 and then failed on November 20, 2017.

What seems to make the problem better or worse? I'm hoping new bushings will fix it
How long have you had this problem? A year
2001 chevy suburban LS: turn signal indicator "clicking" won't stop even when signals not in use. Thanks
What seems to make the problem better or worse? None
How long have you had this problem? 2 years
Was working turn it off to go to the store when i came back and started the car it was not working.
the radiator been replaced and the water pump but dont have a heater coil in it
There has been almost a looping..not like a cylinder issue.
I changed the oil screen thought might be clogged but stiil nothing. What else would it be?
Recently replaced motor with a new crate engine. During the removal of old motor I arked a hot wire somewhere(my dumb luck I forgot to unhook the battery first). Installed new motor, replaced basically every sensor including the ecm & had it flashed to correct mileage. Please help I'm at a loss I don't know what else to do.
Vehicle has 100-100k miles
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