Where is the computer on a 1997 Saturn SL1? - 1997 Saturn SL

4 LT

1997 SATURN SL1 REPAIR MANUAL easy way is download the repair manual of your car

check the numbers on both of them first

it is not really hard but make sure the ignition switch and security system will still work if you relplace it, if it has a security light in the dash when you open the door, it is harder, if it doesn't then you can do it...
remove all bottom plastic panels, all wiring connections, disconnect the yoke on the engine side of the compartment on the bottom, there are two or 4 big screws holding the column up, loosen them from the bottom, and follow steps, make sure battery is disconnected and air bag fuse is removed...this is just a general instruction.

Iam not sure if your looking for a compressor or a-c hose assembly.
These are the only parts that will fit on your SL1 -1997.

1997 SL1
Hose assembly
Suction hose assembly - Napa part # 282864
Discharge hose assembly - Napa part # 282866

1997 SL1
A/C Compressor - Napa part # 254550

It sounds to me like the ignition switch is going bad. Don't know how hard it is to replace one But if you go here you can look at one
http://www2.partstrain.com/store/details/Saturn/SL1/AC_Delco/Ignition_Switch/1997/Base/4_Cyl_1-dot-9L/ACD1435D.html?vdesc=true
Hope this helps
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Use your spare key or remote key FOB to unlock the doors.

sounds like your alternator is not charging.I would have that checked first.Also check battery terminal bolts/ cables

if there is no heat coming from the vents i would bleed the coolant system for air, usually trapped air in the system will cause this lack of heat.

CHECK THE COILS, WE HAD THE SAME PROBLEM SPENT MONEY ON NEW STARTER, BATT, ETC. .....GOOD LUCK