Hey i just bought a 97 yukon SLE

here about a month ago... now i have a few questions,

Is it true that all SLE's and SLT's came with remote locks? and if so can i just get a remote and just program it to work?
Next question

it's, my freaken gas tank.. if is not filled right up to the top the gauge is always flickering back and forth.. went to the GM dealer and told me to put in these 2 GM cleaning chemicals in the tank and 8 outta 10 times it will fix the problem does anyone else have this problem
next question

Is my trip odometer likes to get stuck on 9's, mainly 9.9 KM but ive had it go up to 299.9 and thats the highest its gotten
and my last question

.. my radio lights dont work but the clock and radio station digits show, and my heater lights dont work either... what could this possibly be and would the 2 problems have somthing in comon?
Thanks alot, hopfuly someone can help me out here... i luv my truck and these are the only thinks that are drawbacks...
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Jordan Swift...
99 Chevy Tahoe LT; 18's, magnaflow,k&n,hypertech,big boom..Street queen
84 Chevy K20; 10" Lift, 40's, 350/sm465/205, 410's more to come