I've gained access to the althernator and removed the left-side bolt [looking at it from the front] and the right-side bolt [but can't pull it all the way out], but the alternator still won't budge... is there another bolt somewhere?

(391) Automatic Transmission Fluid Temperature (TFT) Sensor
Inside the transmission behind side cover
Removal Procedure
Remove the case side cover. Refer to Control Valve Body Cover Replacement .

Important: Lock steering wheel in centered position with wheels straight ahead.
Remove the engine dress cover.
Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.1L or Air Cleaner Inlet Duct Replacement in Engine Controls - 3.8L.
Remove the engine mount struts. Refer to Engine Mount Strut Replacement in Engine Mechanical - 3.1L or Engine Mount Strut Replacement - Right Side and Engine Mount Strut Replacement - Left Side in Engine Mechanical - 3.8L.
Important: For supercharged engines, remove the throttle cable bracket.
Disconnect the shift cable bracket.
Remove the transaxle top side cover bolt.
Install the engine support fixture. Refer to Engine Support Fixture in Engine Mechanical - 3.1L or Engine Support Fixture in Engine Mechanical - 3.8L.
Disconnect the transmission wiring harness connector.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Remove the left front tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
Remove the left inner splash shield 3 push pins.
Loosen the wheel speed sensor harness from the 5 retainers at the cradle.
Remove the transmission support to cradle nuts only. Refer to Transmission Mount Replacement .
Raise the vehicle.
Remove the front splash shield 5 bolts.
Loosen the engine mount lower nuts. Refer to Engine Mount Bracket Replacement in Engine Mechanical - 3.1L or Engine Mount and Bracket Replacement in Engine Mechanical - 3.8L.
Remove the stabilizer bolts and reposition the stabilizer.
Remove the steering gear cradle bolts, then support gear before lowering cradle.
Support the left side of the frame with a jackstand.
Remove the left side frame bolts. DO NOT loosen the right front or the right rear frame bolts. Refer to Frame Replacement in Frame and Underbody.
Remove the left ball joint from the steering knuckle.
Position the drain pan under the transaxle.
Remove the left drive axle from the transaxle. Refer to Wheel Drive Shaft Replacement in Drive Axle.
Secure the drive axle to the steering knuckle/strut.
Adjust the jackstand to lower the left side of the frame until it hangs free. Remove jack stand.
Lower vehicle to access engine support fixture.
Lower the engine/transmission assembly with the engine support fixture to gain access to remaining side cover bolts.
If replacing the side cover, remove 4 engine mount bracket bolts.
Remove the harness retainer.
Raise vehicle to access side cover bolts.
Remove the case side cover bolts (56-58).
Remove the case side cover pan (53).
Remove the case side cover gasket (54).
Clean the case.
Clean the side cover gasket mating surfaces.

Disconnect the wiring harness assembly from the fluid temperature sensor (391).
Remove the fluid temperature sensor (391).
Installation Procedure
Install the fluid temperature sensor (391).
Connect the wiring harness assembly to the with fluid temperature sensor (391).
Install the case side cover. Refer to Control Valve Body Cover Replacement .
Important: It is recommended that transmission adaptive pressure (TAP) information be reset. Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, The ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.
Reset the TAP values. Refer to Transmission Adaptive Functions .

Horn Replacement - Left Side

Removal Procedure

1. Remove the headlamp assembly.
2. In order to gain access to the horn assembly, pull the headlamp assembly to one side.
3. Remove the bolt (3) to the horn bracket through the headlamp cavity.
4. Disconnect the electrical connector.
5. Horn Replacement - Right Side

   Removal Procedure

   
   
   
   1. Remove the splash shield from under the fender.
   2. Remove the bolt (3) to horn bracket from under the facia.
   3. Disconnect the electrical connector.

WOW, sorry it has taken so long for someone to see and respond to your question. You've probably figured it out on your own by now, but if not, here is your answer. The heater core in your Caprice is located behind the glove box. To gain access, you have to remove the lower right dash insulator panel (below the glove box) and than the glove box. Remove any vaccuum lines ( mark their locations.) Then remove the lower instrument panel brace and then the heater core cover. Remove the heater core clamp bolt and clamp. Disconnect the heater hoses from the heater core on the left hand side of the engine compartment( looking at the engine from the front of the car.) Then remove the heater core.

If it is the heater fan motor, I believe on that you have to actually remove the dash to gain access. Remove the speaker grill on top and there are a few torx screws under that. Remove the side access panels, when you open the car doors you will a panel on each side, they are just held in there by pressure and small nubs on the panels, you will find more torx screws. In the glove box on the top towards the front you will find a few more torx screws, also in that area there are two 10 mm bolts that are somewhat hidden but accessible. After all the bolts and screws are removed you can pull the dash cover off, becareful because on the passenger side, the airbag has a paper type cover on it, you don't want to damage that. From there you should be able to gain access to the heater blower on the passenger side of the vehicle. Good luck.

Front bumper requires removal to gain acsess to the lower 10mm bolts. Bumper comes off by removing the 2 10mm bolts on the top of the bumper then unscrew the 2 T30 screws in the front wheel arch liner (bumper side) and then you will be able to see a 10mm bolt reversed into a bracket at the top of the bumper from a inside veiw, remove and repeat for the other side. Then its 3 10mm bolts that secure the front under tray (if yours has one). Then there will be another 10mm bolt to the wing side of the headlamp from a above veiw. Bumper should then just pull off and watch for the connector for the fog lamp harness.

Just the 2 lower headlamp bolts andit should pull from its housing

you have to remove the belt . you can use a long3\8 ratchet to pull up or push down on the tensioner pulley. then just remove the bolt that holds the tensioner to the side of the motor.replace it with a new one and reinstall the belt

The horn is generally located underneath the most front lower vehicle undercarriage either on the right or left side towards the wheel well splash guard area, bolted to the forward engine frame chassis. This is not seen from under the hood look usually. You must lay down on your back with a flashlight and look up. Should you find it, examine it to see if it is rusty. If so, replace it. If not, pull each connector out to examine for corroided connectors. If that is present, you should push and pull the connector on and off several times and then put some di-electric grease in the plug and plug them in. Tom H.

2 choises remove motor mounts to lower front of motor to remove from top or lower trans from mount to remove from bottom

Depending on the year you have to remove the grille to gain access to the mounting bolts under the grille, as well as the lower air vents in the lower valence to gain access to those mounting bolts. Remove the screws from the fender well liner to the bumper and pull the front bumper off to gain access to the lower mounting bolts for the headlight assembly.

Hiya... here's the details of fender removal/installation:
the left-side (same for right-side) fender has 6 bolts attached to the "sidebody" frame.
The bolt location:
3 are on the top fender-easy to find when hood is open,
1 is hidden at the rear of top inner fender-just open the left-front door wide to find it (early equinoxes had foam-like noise absorber material in it, just remove it from underneath fender after the wheelwell liner is removed),
1 bolt is hidden at bottom of front fender area at headlight/bumper area-you need to remove plastic wheelwell liner to gain access,
1 bolt is hidden at bottom of rear fender area where the black plastic rocker panel meets below the fender...
THIS area is probably the most difficult task to do since it requires you to remove a small bolt found on the front of rocker panel behind the front-left wheel then use a flat screwdriver or clip removal tool to pry open the black plastic **clip's 'dime-sized' head prior to pull out the clip's body (it has 8 clips underneath the chassis) then use your hands to grasp the rocker panel underneath, pull it down-toward you...this should do it....USE CARE during rocker panel and clip removal/installation so you don't break the clips!
It also has yellow plastic clips inside the rocker panel (used as a guide during installation into rocker sill holes-use caution not to break it)
**note: early equinoxes had rocker panel clips that you can actually pull it out from the hole, while later equinoxes has 'built-in' clips inside rocker panels that you don't see the clip heads below it due to engineering part design change**
Be sure to exercise care when handing this task!