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Dave Nova
Dave Nova, Cadillac Technician
Category: Cadillac
Satisfied Customers: 1522
Experience:  ASE Master Certification. GM World Class Certification
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2011 cadillac srx, water got into trunk area, hydraulic pump

Customer Question

2011 cadillac srx, water got into trunk area, hydraulic pump for liftgate replaced, liftgate control module replaced, still cant get communication with LGM , checked power, grounds and low speed communication line up to DLC all ok. I need a GM tech that has ran into this issue before because is a very common issue on those cadillacs.
Submitted: 6 months ago.
Category: Cadillac
Expert:  Ryan Schott replied 6 months ago.

replace the pins on the power and ground circuits and the low speed at the liftgate module, do not probe them after replacement.

low speed X1 pin7

Terminated Lead: 13575550

Terminal/Tray: 15445905/23

pins 3 and 6 on x2 a power and ground

Terminated Lead: 13575756

Terminal/Tray: 15304713/19

pin 4 on x2 power

Terminated Lead: 13575753

Terminal/Tray: 15304711/8

Customer: replied 6 months ago.
any chance you can provide with the part # ***** the pins needed. i cleaned up those really good and this would be the first time replacing a pin connector on this type of car . also i dont mean to be rude but im just gonna get charged ones im satisfied with the answer/fixed my issue right?
Customer: replied 6 months ago.
btw pins for power are 3 an 4 on x2 and ground on same connector pin 6 correct?
Expert:  Ryan Schott replied 6 months ago.

correct. the pin numbers are listed above, as well as the numbers for leads with pins on them if you prefer to have wires on your pins already. let me know if you need any diagrams. If you want to shoot me your e-mail i can send you a PDF on replacing terminals, its 15 mb so i cant upload it here.

Customer: replied 6 months ago.
I thought so, I'll report back once I finish, thank you!
Expert:  Ryan Schott replied 6 months ago.

No problem let me know how it goes.

Customer: replied 6 months ago.
hello Ryan , I did replaced ther powers, ground and low speed wires and still no communication with LGM.
what could be next
Expert:  Ryan Schott replied 6 months ago.

can you communicate with everything else on the class 2 data line?

Expert:  Ryan Schott replied 6 months ago.

and with the vehicle running how many volts do you see on it at the DLC?

Customer: replied 6 months ago.
I get communication with all the modules except the LGM and when i do a complete scan there are 3 module that not communicate with LGM , the BCM and two others that i cant remember right now
i did not check how many volts at DLC, i can double check but im sure is above 12V
Expert:  Ryan Schott replied 6 months ago.

no how many volts are on the class 2 data line at the dlc.

Customer: replied 6 months ago.
can you tell me which pin is class 2 at DLC please.
Expert:  Ryan Schott replied 6 months ago.

1

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