Question about 2007 Chevrolet Impala LS Sedan New Cars
Tramssion will not shift out of park unless i hit manual release button
Switch at brake pedal is most likely toast or out of adjustment, preety easy to change adjust
Posted on Jan 04, 2015
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Posted on Jan 02, 2017
You need to replace your BTSI (brake transaxle shift interlock) solenoid. I have replaced MANY and it is the problem 99% of the time. The only other thing it could be is your BTSI fuse so check it first. All you have to do is remove the shifter assembly and install a new BTSI solenoid (couple of screws and two connector terminals) and you will be driving in no time. Hope this helps!!
Posted on Jun 23, 2009
Transmission does not shift automatically, only manually. Swap
in a known-good PCM, check wiring, check other sensors such as VSS and
3rd gear starts, can manually shift through all gears. When car has been turned off for a bit, then back on it will run normally.: VSS drop off w/ Hi-stall converter. The rpms are too high, but VSS is showing no movement. Happens after a tire burning take-off. Doesn't store a code, will not throw a CEL (I've heard that it will store a code if it happens 3 or more times). Cure: Reprogram PCM for VSS drop off -- PCMforLess knows about it.
Note that many problems that show up as transmission issues are actually PCM or electrical, and may be external to the transmission. Try a different PCM, and check for chafing where the cables come out of the PCM or the transmission on the passenger side.
Good luck and thank you for using Fixya.
Posted on Mar 13, 2010
The speed sensor is in the tailhousing of the transfer case. Do you have a check engine light on?
Posted on Apr 21, 2010
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Jun 29, 2017 | Cars & Trucks
Jun 19, 2016 | 2010 Mercury Grand Marquis
The ignition switch is turned to the RUN or the START position.
When the ignition switch is in the RUN or the START position, the current flows from the B/U Lamp fuse located in the underhood bussed electrical center (UBEC) through CKT 839 (PNK) to the park/neutral position switch. The park/neutral position switch also feeds the backup lamps portion of the switch. With the transmission in the PARK position, the current flows to the BTSI fuse located in the underhood bussed electrical center (UBEC) through CKT 275 (LT GRN). The current then flows to the TCC/stoplamp switch through CKT 584 (LT GRN/BLK). The current continues to the BTSI solenoid through CKT 1135 (DK GRN/WHT). The ground path is provided through CKT 1850 (BLK) to G207. When the brake pedal is depressed, the normally closed contacts in the TCC/stoplamp switch open and the current flow is interrupted. When the current flow is interrupted, the BTSI solenoid de-energizes. The transmission may then shift to another gear. When the transmission shifts to another gear (except PARK), the contacts in the park/neutral position switch open. This condition stops the current flow to energize the solenoid when the brake pedal releases.
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