Hello Rande Cox & welcome to fixya,
Always start by removing the GROUND at the
BATTERY first (& put it back LAST )...!!.
GM starters can be a nightmare...
Pay careful attention to the EXISTING SHIMS...
TECHNICALLY... a "BENDIX" is thrust by the
spin of the STARTER motor... Whereas a
"PRE-ENGAGED" starter gear is pushed
into the starter RING gear by the SOLENOID.
See the picture below for REFERENCE purposes:
https://www.rockauto.com/en/moreinfo.php?pk=4394562&cc=1357152&jsn=449
I would VIGOROUSLY encourage you to
remove the STARTER/SOLENOID as a
single unit...
(( now is the time to inspect the RING gear
( have an assistant rotate the engine ))).
Notwithstanding a broken starter RING gear
your MOST LIKELY cause of your failure
will be the starter DRIVE GEAR solenoid...
The biggest challenge will be to properly
reinstall shim at the starter to the engine
( EXACTLY as they WERE ).
Shimming of a GM NEW STARTER to your vehicle
can be quite a challenge... Research well BEFORE
attempting.
Good luck.
https://www.howacarworks.com/ignition-system/checking-and-replacing-the-starter-motor
SOURCE: My 1999 pontiac montana rear sliding power door will not work
I went to bulldogsecurity.com and looked up the wiring diagram for this vehcle. However, prior to checking this part, I would check to see if you have a blown fuse. It doesn't hurt and only takes a few minutes. There should be a fuse for that either somewhere on the side of the dash or near the brake pedal area. If not it may be under the hood, but it should be inside the vehicle. You may have multiple fuse boxes. If it has (2) sliding doors it will have a wire for the auto doors in each kick panel (under the plastic trim/molding) when you open the door and look down you will see all of the trim/molding it should snap out or may be held in place with a screw or (2). Once you remove that you should see the wires. It says for the left side it is either light blue or black and the right side is definitely light blue. Trace this wire until you find out where it ends (the motor or switch to control the auto doors) Then test the switch/motor to see if it is bad.
SOURCE: need to replace starter
should be 2 bolts 15mm and then 2 nuts on the starter 13mm and 8mm. this is a very easy starter to do. make sure you remover ground battery cable before doing this starter.
good luck,
michael
SOURCE: Changing the starter solenoid on a 2000 Pontiac Montana
On your van the solenoid is attached to the starter. If you can get a solenoid separate (i don't know if you can) then you will need to take the starter off and remove the solenoid (2 screws holding it on) and the wires (on red and one black i believe) pay attention to which wire goes where because you don't want to reverse it on the new solenoid.
SOURCE: Where is the starter on the 2000 montana
Fowwow the large red wire from the battery and it will lead you to it. It will be on the lower part of the engine near the flywheel.
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I thought so just making sure before I go buy one they're a little expensive. Thank you so much
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