Why did you change the coils ??????? Do you know how to test electrical circuits with a DVOM - digital volt ohm meter ? Check for B+ voltage at the ignition module ,connector 2 pin C this is a pink wire . Check for a good ground at connector 2 pin A ,black with white stripe . Plus watch as many videos from this guy as you can on GM igntion systems .Your vehicle has two crankshaft position sensors . GM Bypass Ignition System Operation part 1
check the battery...maybe the amp hours is not
sufficient...not original recommended battery....inconsistency in starting...the solenoid is a switch...which may need cleaning....the starter motor may be full of carbon dust....causes a short to earth and pulls battery power on startup....a big neglected area in car maintenance...
Blower motor control module probably , but without testing that's just a guess . Do you know how to do automotive electrical testing ? Testing B+ to the module ? Do you know where the module is ? You can find a wiring diagram here , http://www.bbbind.com/free_tsb.html There is a fuse for the blower motor in the I/P fuse box , HVAC blower 10amp ,
have you replaced the wiring to the starter motor, both the main power lead from the battery and the ground (earth) lead from the battery. Being that the vehicle is over 15 years old, excessive internal resistance could be the cause of your problem, this also presnts itself as clicking from the starter motor because it is transferring less current...i would seriously look at this direction, if you dont know about auto-electrical testing, i suggest you take it to a shop to have it looked at it
Please make sure to use , transmission oil cooler hose, And you don't need transmission out to change the hose you can even cut the line weres is leaking and splice it up, but if the hose you used blows up and hits the exhaust, it's probable it catch on fire, tyranny fluid is flammable at 300°f ,hose clams cut into the hose and fails ,you want to use a union..see pics