Where can I find the tcm p0700 and also the 1-2 shift solenoid a p0752 says its stuck on. Are these internal or can I getto them without dropping the tranny? It's a 2007 gmc acadia

There could be a number of possible reasons why your G30 Chevy van is not shifting out of 1st gear. Some potential causes could include:

1. Faulty shift solenoids: The shift solenoids are responsible for controlling the flow of transmission fluid through the valve body, which in turn affects the shifting of gears. If the solenoids are not functioning properly, it can cause the transmission to get stuck in 1st gear.
2. Low transmission fluid pressure: If the fluid pressure in the transmission is too low, it can prevent the gears from shifting properly.
3. Faulty transmission control module: The transmission control module (TCM) is responsible for controlling the shifting of gears in an automatic transmission. If the TCM is faulty or has malfunctioned, it can cause the transmission to get stuck in 1st gear.
4. Internal transmission issues: There could be internal issues within the transmission itself that are preventing it from shifting out of 1st gear. This could include worn gears or clutches, or other mechanical issues.

It is recommended to take your van to a qualified mechanic or transmission specialist to diagnose the issue and perform any necessary repairs.

P0752 OBD II Trouble Code Shift Solenoid Stuck On YourMechanic Advice

Have you check fluid level ? Is your check engine light on ? You have a bad shift solenoid inside the transmission ,more then likely . Have codes checked ,you mite have P0700 + code

P0750 - Shift Solenoid A

P0751 - Shift Solenoid A Performance or Stuck Off

P0752 - Shift Solenoid A Stuck On

P0753 - Shift Solenoid A Electrical

P0754 - 1-2 Shift Solenoid Intermittent

P0755 - Shift Solenoid B

P0756 - Shift Solenoid B Performance or Stuck Off

P0757 - Shift Solenoid B Stuck On

P0758 - Shift Solenoid B Electrical

P0761 - Shift Solenoid C Performance or Stuck Off

Year make and model would be helpful. Could be the solenoid, or the internal harness. Could be the valve body also. Some cars you can pull the pan and access it, some have to have the solenoid package replaced, some you have to pull the transmission and tear it down to fix.

755 (why drop the prefix?????) makes his 10x harder.

the FSM covers this , buy one or look online at alldata.com

P0755

the P0 COUNTS ! p means power-train, the 0 means federal std. code.



lets to TCM 101:

the TCM shifts this tranny,.

the TCM sends 12vdc to the solenoid to do SHIFTS.

the TCM checks the voltage at time of this command.

the voltage reads wrong, the TCM is not HAL2000, its just brick stupid

it only knows the test it did fail, and NEVER why

enter the technician and his FSM book and the steps to find it





the TCM can see solenoid faults 2 ways (at least)

voltage read back at the solenoid (the fsm is clear on this ,read it)



or RPM drop fail. VSS fails to drop or rise pre shift command.

each time the TCM shifts this tranny it looks at the TAIL RPM

and if wrong sets codes.

the FSM actual explains this. best.



now see actual FSM

Actual gear ratio and the Required gear ratio did not match during the CCM Rationality test.

see , unlike my first link (bad net bs)

the TCM does RATIONALITY tests.

that means it shifts and then looks at tail shaft RPM (VSS)

and sees rpm wrong. (tables of valid rpm in TCM)

at an up shift the RPM drop is checked. carefully. by the TCM.



and possible list. quite different.

• * A/T component problems (i.e., in clutch, brake or gears)



• * SSB is damaged, stuck "open" or stuck "closed"



• * Transmission valve body is clogged, dirty or stuck

in barstool lingo.

tranny slips in any gear. related to B solenoid.

by valve body, that includes the actual valve B sticking or dirty or clogged.



make sure the transmission ground strap is no missing or bad.

this IS MY FIRST CHECK on all A/T cars...

the transmission must be 100% perfectly grounded at all times.

or it WILL fail. (TCM fails()

A shift solenoid is just that an electric solenoids that opens and closes hydraulic fluid passages that shift the transmission, If you have never had the fluid and filter replaced in the truck do so, dirt may be the cause here and often a fluid change and driving it awhile fixes the problem,

No reverse is a dead giveaway of a failed transmission. You must remove it and replace it or rebuild it. P0752 code will not cause the loss of reverse gear.

i have hard time shifting from 1st gear to 2nd gear please help me

What was the codes exactly that Auto Zone gave you.??? it might just be a simple wire harness that may have gone loose since you did some work on the speed sensor.
Here are the trouble codes for your car.  Good Luck and get the car scanned again for a more define information.

P0751 Shift Solenoid A Performance or Stuck Off

P0752 Shift Solenoid A Stuck On

P0753 Shift Solenoid A Electrical

P0754 Shift Solenoid A Intermittent

P0755 Shift Solenoid B Malfunction

P0756 Shift Solenoid B Performance or Stuck Off

P0757 Shift Solenoid B Stuck On

P0758 Shift Solenoid B Electrical

P0759 Shift Solenoid B Intermittent

P0760 Shift Solenoid C Malfunction

P0761 Shift Solenoid C Performance or Stuck Off

P0762 Shift Solenoid C Stuck On

P0763 Shift Solenoid C Electrical

P0764 Shift Solenoid C Intermittent

P0765 Shift Solenoid D Malfunction

P0766 Shift Solenoid D Performance or Stuck Off

P0767 Shift Solenoid D Stuck On

P0768 Shift Solenoid D Electrical

P0769 Shift Solenoid D Intermittent

P0770 Shift Solenoid E Malfunction

P0771 Shift Solenoid E Performance or Stuck Off

P0772 Shift Solenoid E Stuck On

P0773 Shift Solenoid E Electrical

P0774 Shift Solenoid E Intermittent

P0780 Shift Malfunction