Hi,
There is no way to bypass the starter. It is needed to turn the engine for it to start. If it is smoking, I wouldn't keep trying.
When you can replace it, here is a link that shows in general how one is replaced:
https://www.2carpros.com/articles/how-to-replace-a-starter-motor
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Here are the directions specific to your vehicle:
2006 Buick Truck Rendezvous FWD V6-3.5L VIN L
Removal and Replacement
Vehicle Starting and Charging Starting System Starter Motor Service and Repair Removal and Replacement
REMOVAL AND REPLACEMENT
STARTER MOTOR REPLACEMENT
REMOVAL PROCEDURE
pic 1
1. Disconnect the negative battery cable.
2. Raise and support the vehicle. Refer to Vehicle Lifting.
3. Remove the front transaxle closeout cover bolt.
4. Remove the front transaxle closeout cover.
pic 2
5. Remove the starter solenoid "BAT" terminal nut (5).
6. Remove the positive battery cable terminal (4) from the starter solenoid.
7. Remove the starter solenoid "S" terminal nut (3).
8. Remove the engine harness terminal (2) from the starter solenoid.
pic 3
9. Remove the starter bolts.
10. Remove the starter.
INSTALLATION PROCEDURE
NOTE: Before installing the starter motor to the engine, tighten the nut next to the cap on the solenoid BAT terminal. If this terminal is not tight in the solenoid cap, the cap may be damaged during installation of electrical connections and cause the starter motor to fail later.
pic 4
1. Position the starter to the engine block.
2. Install the starter bolts.
Tighten the bolts to 40 N.m (30 lb ft).
NOTE: Refer to Fastener Notice.
pic 5
3. Install the engine harness terminal (2) to the starter solenoid.
4. Install the starter solenoid "S" terminal nut (3).
Tighten the nut to 3 N.m (27 lb in).
5. Install the positive battery cable terminal (4) to the starter solenoid.
6. Install the starter solenoid "BAT" terminal nut (5).
Tighten the nut to 13 N.m (115 lb in).
pic 6
7. Install the front transaxle closeout cover.
8. Install the front transaxle closeout cover bolt.
Tighten the bolt to 10 N.m (89 lb in).
9. Lower the vehicle.
10. Connect the negative battery cable.
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I wish I had an easier answer for you, but the starter is needed to start the engine. It can't be bypassed.
Let me know if this helps or if you have other questions.
Take care and God Bless.
Joe
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Tuesday, February 2nd, 2021 AT 4:39 PM