Transmission module location - 2000 Chevrolet Silverado 1500

NO PROBLEM TOLD , NOT ONE TINY CLUE JUST A HUNT
MOST TCM ARE INSIDE THE CONFINES OF THE PCM.
ECM BECAME PCM , THE P MEANS TRANNY TCM ADDED THERE
,BUT WITH SOME EXCEPTIONS ON ENGINE OR DIESEL OR OTHER REASONS. ONLY YOUR DEALER KNOWS WHAT IS THERE
FOR A TRANSMISSION OR LEARN TO READ YOUR VIN TO RPO
;LIST AND LEARN IT.
2004 IS NOT 2014 or 2023 it is a 2004 only question.
Suburban 1500 or 2500 not TOLD.
toss coin 1500
toss coin 4L60 transmission or 4L80
answer is PCM., located 16 control pins tranny to PCM , fact.
now where is the PCm/
we that is easy to
all in the service manual

ID#1

The vacuum modulator on a 1994 Suzuki Vitara is located on the transmission. It is typically mounted on the side of the transmission case or on a bracket near the transmission. The vacuum modulator is connected to the transmission by a vacuum hose, and it helps to control the shift points of the transmission based on engine load and acceleration. To locate the vacuum modulator on your Suzuki Vitara, you may need to follow the vacuum hose that runs from the engine to the transmission. You can also refer to your vehicle's service manual for more detailed information.

The Transmission Control Module is located inside the transmission at the rear of the case underneath the end cover. The Transmission Control Module is located in an E-Box in the plenum chamber on the driver-s side below the Engine Control Module (ECM).
https://www.autozone.com/repairguides/Audi-Cars-1999-05/Component-Locations/Transmission-Control-Module/_/P-0900c152801c0e73

The Transmission Control Module is located inside the transmission at the rear of the case underneath the end cover. The Transmission Control Module is located in an E-Box in the plenum chamber on the driver-s side below the Engine Control Module (ECM).

The Transmission Control Module is located inside the transmission at the rear of the case underneath the end cover. Or the Transmission Control Module is located in an E-Box in the plenum chamber on the driver-s side below the Engine Control Module (ECM).

Transmission control module is part of the PCM - powertrain control module . Engine an transmission module all in one . It's in the engine compartment .
Powertrain Control Module (PCM) 4.8L,5.3L,6.0L
Near the left front inside the engine compartment

images for transmission vacuum

Vacuum Modulator Service.wmv - YouTube

? 6:00
www.youtube.com/watch?v=u7S9mDqWguY
Dec 19, 2011 - Uploaded by GrumpysTravells How to remove and clean the vacuum modulator air filter. ...Transmission modulator replacement (early GM 4T60-E models) -

What large square fuse ? The 4X4 switch get's it's B+ voltage from the four - wheel drive control module . computer controlled ! Has two relay's - transfercase hi to low & low to high ,located in the Auxiliary relay box #3 . location left side of radiator core support . Your best bet ,take it to a qualified repair shop that has a diagnostic tool that can communicate with the 4X4 control module . Read code's ! Probably has a code like one of these
P1812 Transmission 4-Wheel Drive Mode Select Circuit Failure 4WD control module Go To Pinpoint Test D . P1815 Transmission 4-Wheel Drive Mode Select Short Circuit to Ground 4WD control module Go To Pinpoint Test A .
But code have a few others as well .
B2105 Throttle Position Input Out of Range Low 4WD control module Go To Pinpoint Test B . B2106 Throttle Position Input Out of Range High 4WD control module Go To Pinpoint Test B . C1728 Transfer Case Unable to Transition Between 2H and 4H. 4WD control module Go To Pinpoint Test C . C1729 Transfer Case Unable to Transition Between 4WD HIGH and 4WD LOW 4WD control module Go To Pinpoint Test D . C1979 IWE Solenoid Circuit Failure 4WD control module Go To Pinpoint Test F . C1980 IWE Solenoid Short to Battery 4WD control module Go To Pinpoint Test F . P1812 Transmission 4-Wheel Drive Mode Select Circuit Failure 4WD control module Go To Pinpoint Test D . P1815 Transmission 4-Wheel Drive Mode Select Short Circuit to Ground 4WD control module Go To Pinpoint Test A . P1824 Transmission 4-Wheel Drive Clutch Relay Circuit Failure 4WD control module Go To Pinpoint Test A . P1826 Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Battery 4WD control module Go To Pinpoint Test A . P1827 Transmission 4-Wheel Drive Low Clutch Relay Short Circuit to Ground 4WD control module Go To Pinpoint Test A . P1849 Transmission Transfer Case Contact Plate A Short Circuit to Ground 4WD control module Go To Pinpoint Test D . P1853 Transmission Transfer Case Contact Plate B Short Circuit to Ground 4WD control module Go To Pinpoint Test D . P1857 Transmission Transfer Case Contact Plate C Short Circuit to Ground 4WD control module Go To Pinpoint Test D . P1861 Transmission Transfer Case Contact Plate D Short Circuit to Ground 4WD control module Go To Pinpoint Test D . P1867 Transmission Transfer Case Contact Plate General Circuit Failure 4WD control module Go To Pinpoint Test D . P1891 Transmission Transfer Case Contact Plate Ground Return Open Circuit 4WD control module Go To Pinpoint Test D .

it is located on the side of the transmission case, it has a vacuum hose going to it, make sure that hose is good and has vacuum from the engine going to the modulator, here is a picture of the modulator so u can ID it.

It is located on the transmission with a vaccume line going to it. There is a clamp with a bolt that holds it to the transmission. It is an easy fix.