How to replace BCM on 2001 grand am 4 door 4 cyl?

Check the wires that run through the door pillar they do break in time as door opened repeatedly .

have to reflash bcm

1. All you need to do is remove radiator cap.
2. Run car until hot and you see antifreeze circulating
3. and more antifreeze until full

That's all that's to it.

its your van and you can do what you like with it,go for it.adrian,,,,,,,,

https://s1.postimg.org/y2530m1an/door_locks.jpg

Click on the link. I tried to get everything on one page, which makes it harder to read. It's been my experience that posting multiple images, only the first image posts, not the others. I didn't see a relay in diagram.
The bcm controls door locks with input from the door lock/unlock switch, I doubt I can trouble shoot that from here. You could check for bcm trouble codes, see if anything comes up? Some of the national brand auto stores will check po codes for free, I don't know about bcm codes?
Could be other issues.

Interior Lights Circuit Description
By using a feature called inadvertent power control, the body control module (BCM) supplies power to all of the following components:
• The courtesy lamps
• The dome lamps
• The rear view mirror reading lamps
• The instrument panel compartment lamp
• The rear compartment lamp
The left front door ajar switch turns the interior lamps on through the BCM by grounding CKT 394. When the left front door is open, the switch is closed. This condition provides a ground and a door open input to the BCM. The BCM then grounds the following lamps through CKT 156 in order to turn the lamps on:
• The courtesy lamps
• The dome lamp
• The rearview mirror lamps
The right front door ajar switch and the rear door ajar switches turn the interior lamps on by grounding CKT 395 from the BCM.
When the ignition key is removed from the lock cylinder, the interior lamps remain on for approximately 40 seconds.
The BCM provides an interior lamps-on delay after a door is opened. The lamps remain on for approximately 40 seconds or until the ignition switch is turned to the ON position. The 40 second lamps-on delay reduces to 4 seconds if a door is opened within 2 minutes of the ignition switch being moved from the ON position. The interior lamps immediately turn off when the vehicle begins to move.
The dome lamp OFF-DOOR-ON switch controls the dome lamp. When the switch is in the OFF position, the dome lamp remains off. When the switch is in the DOOR position, the dome lamp lights when a door is opened by the BCM grounding CKT 156. When the switch is in the ON position, ground is supplied through CKT 750. The rear view mirror reading lamps are controlled by the rear view mirror reading lamps switch or through CKT 156 from the BCM.
Voltage is supplied at all times to the BCM through the INT LPS fuse. The BCM supplies voltage to the interior lamps through CKT 1732.

Battery Run Down Protection
When the ignition switch is in the OFF position, the BCM turns off the power to all of the interior lamps after 18-22 minutes.
The BCM will reset the inadvertent power control relay output when one of the following actions is performed:
• Open or close a door.
• Turn the ignition switch to the ON position.
• Turn off any interior lamps that may be on.
• Press the power door lock switch/keyfob button.
• Press the decklid release keyfob button.

Courtesy or Dome Lamps Always On
Step
Action
Yes
No
1
Did you perform the Lighting Systems Diagnostic System Check?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Lighting Systems
2
Use the Scan Tool in order to command the courtesy lamps OFF.
Do the courtesy lamps turn OFF?
YES - Go to Step 4
NO - Go to Step 3
3
Test for a short to ground in the courtesy lamps control circuit (156). Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - System OK
NO - Go to Step 7
4
Test for a short to ground in each door jamb switch circuit:
• Circuit 394-Driver door
• Circuit 395-Passenger door(s).
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - System OK
NO - Go to Step 5
5
Test each door jamb switch for proper operation. Refer to the following:
• Open switch with the door closed
• Closed switch with the door open
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find a malfunctioning door jamb switch?
YES - Go to Step 6
NO - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
6
Replace the malfunctioning door jamb switch. Refer to Door Jamb Switch Replacement in Doors.
YES - Is the repair complete?
NO - System OK
--
7
Important: Perform the set up procedure for the body control module.
Refer to Body Control Module (BCM) Programming/RPO Configuration .
Replace the body control module. Refer to Body Control Module Replacement in Body Control System.
Did you complete the replacement?
System OK
Instal the door jamb switch wire harness.
Install the door jamb switch (2).

You didn't state what size engine you have.
The 2.2 engine----- 6.9 qts.
The 2.3 engine-----7.4 qts.
The 2.4 is 7.4 qts.
The 3.1 is 7.4 qts.
The 3.4 is 6.9 qts.
These are the capacities for refilling after being drained.

Check for a 40 amp blown fuse for the BCM this controls those 2 unit. If this checks ok disconnect the BCM module and plug back in this will reset it the BCM is located under the Drivers side kick panel against the firewall. If it work after the BCM reset replace the BCM it will work only temporaraly.

sounds like the downshift cable is out of adjustment, or stretched out. the downshift cable goes to the transmission. CARL,