PCM module, ECM module 1996 Chevy Suburban K model

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

TRUCK MEANS C1500 PICKUP?
NO SURE THE PROBLEM? IS THERE ONE?
THE MAF WIRE TO THE PCM SO IT CAN COMPUTER FLOWS AND MATCH INJECTION RATES TO IT.
MY GUESS IS YOU HAVE NO SERVICE MANUAL
NOR KNOW HOW TO TEST ANY MAF.
DID THE SCAN TOOL SHOW MAF DTC ERRORS?
MOST MAF AR3 3 PINS, GROUND , SIGNAL ,DC POWER.
MANUAL IS HERE
https://eautorepair.net/Marketing/Default.asp

I WILL PRESENT THE MAF PIN OUT.

12VDC POWER IS ING1 FUSE. BOX UNDERHOOD
B PIN IS GROUND
IT IS THAT SIMPLE.

The 1987 Chevy S10 2.5L typically only has one Engine Control Module (ECM), also known as the Powertrain Control Module (PCM). However, it is possible that some variations or modifications of the vehicle may have additional control modules for specific functions, such as the transmission control module (TCM), body control module (BCM), or anti-lock brake system module (ABS), but these are not considered part of the engine control system.

Question edited for clarity, full year make model, spelling 'Suburban' from Surburban.
Question moved to sub category.

No there isn't one. Cruise control is a joint effort from BCM and ECM. Check the Body Control Module fuses.

Fuse Box Diagram Chevrolet Suburban / Tahoe (2015-2020)

https://fuse-box.info > chevrolet > chevrolet-suburban-...
Here you will find fuse box diagrams of Chevrolet Suburban / Tahoe 2015, 2016, 2017, 2018, 2019, and 2020, get information about the location of the fuse ...

Chevrolet Suburban (2015 - 2016) - fuse box diagram

https://www.autogenius.info > chevrolet-suburban-2015...
Dec 31, 2017 - The underhood fuse block is located in the engine compartment, on the driver's side of the vehicle. Chevrolet Suburban - fuse box - engine ...

Do you know if it is ECM/PCM or BCM controlled ?
Circuit Description (ECM/PCM Controlled)
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.

Free wiring diagrams here
http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on engine ,then under subsystem click on starting . Click the search button ,then click the blue link .
If you look at the diagram you will see the ignition switch ,when in start it sends B+ voltage to the ECM/PCM or depending on which system or engine to the BCM . When it see's this input it will energize the starter relay located in the under hood fuse box. This happens if the control module in charge see's another input from the PNP- park neutral position sensor and if no anti-theft system problems .
Good luck !

This is a computer controlled system (BCM) supply's power to switch .Voltage is supplied to the cruise control switch via the steering wheel control switch reference voltage circuit supplied by the BCM.
The following are the main components of the Cruise Control System:
• The accelerator pedal
• The stop lamp switch
• The body control module (BCM)
• The cruise control switches
• The engine control module (ECM)
• The throttle actuator control (TAC) motor
• The vehicle speed sensor (VSS)

Taking your vehicle to a quailfied repair shop would be your best option . Using a factory scan tool to view input data from switches and sensors is the only way to diagnose the cruise control on your vehicle . Just replacing parts does not cut it .

The body control module (BCM) monitors the signal circuit of the cruise control switches. The BCM relays the cruise control switch status to the engine control module (ECM) via the GMLAN serial data circuit. The ECM uses the status of the cruise control switch to determine when to capture and maintain the vehicle speed. The ECM monitors the vehicle speed signal circuit in order to determine the desired vehicle speed. The ECM uses the throttle actuator control (TAC) motor in order to maintain the vehicle speed. For further information on the TAC System, refer to Throttle Actuator Control (TAC) System Description .

This is not a fuse problem !!!!!!!!!

You probably don't know what GMLAN serial data is ,do you ? It's GM 's version of C.A.N. How to Diagnose Controller Area Network CAN

REMOVAL & INSTALLATION

Print

OPERATION

When the term Electronic Control Module (ECM) is used in this guide it will refer to the engine control computer regardless that it may be a Vehicle Control Module (VCM), Powertrain Control Module (PCM) or Engine Control Module (ECM).
The Electronic Control Module (ECM) is required to maintain the exhaust emissions at acceptable levels. The module is a small, solid state computer which receives signals from many sources and sensors; it uses these data to make judgments about operating conditions and then control output signals to the fuel and emission systems to match the current requirements.
Engines coupled to electronically controlled transmissions employ a Powertrain Control Module (PCM) or Vehicle Control Module (VCM) to oversee both engine and transmission operation. The integrated functions of engine and transmission control allow accurate gear selection and improved fuel economy.
In the event of an ECM failure, the system will default to a pre-programmed set of values. These are compromise values which allow the engine to operate, although at a reduced efficiency. This is variously known as the default, limp-in or back-up mode. Driveability is almost always affected when the ECM enters this mode.

REMOVAL & INSTALLATION

See Figures 1 and 2

Fig. Fig. 1: ECM mounting scheme-except 1996 models

Fig. Fig. 2: ECM mounting scheme-1996 models
The ECM is located in the passenger side footwell in the kick panel up to 1996. In 1996, the ECM is located in the engine compartment next to the battery.

1. Disconnect the negative battery cable.
2. Disengage the connectors from the ECM.
3. Remove the spring retainer off and over the rail of the ECM on vehicles except 1996.
4. Slide the ECM out of the bracket at an angle.
5. Remove the ECM.

To install:

1. Install the ECM into the bracket.
2. Install the spring retainer (except 1996) and plug in the electrical connectors.
3. Connect the negative battery cable.

'Sensor 2' means the sensor is downstream from the exhaust manifold instead of on the exhaust manifold.

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HO 2S
The heated oxygen sensor is used by the powertrain control module to measure the amount of oxygen in the exhaust. The PCM uses this data to control the air fuel mixture in the engine. The PCM sends a bias voltage of approximately 450 mV to the oxygen sensor. At operating temperature the oxygen sensor signal varies between 0 and 1,000 mV. When the mixture is rich the oxygen content is low and the voltage signal will remain on the high side of the 450 mV mid-range. When the mixture is lean the oxygen content is high and the voltage signal will remain on the low side below the 450 mV mid-range.
Typical oxygen sensor

The oxygen sensors on later model vehicles are equipped with a heater circuit. The heater circuit in the oxygen sensor shortens the time required for the sensor to reach operating temperature and provides a more accurate signal.
IAC Valve

PCM is the Powertrain Control Module. its located behind the glove box in the dash.

The PCMor powertrain control module is only on 1996 and newer cars.Earlier models have a ECM or electronic control module/pcm.You want to change the ECM if its a 1992.Its located under the right hand side of the instrument panel.The ecm has a prom( programmable read only memory)in it.You will need to remove this from the old ecm and install in the new ecm.The ECM/PCM can be used in many different GM vehicles but the prom is very specific and must be used only in the vehicle it was designed.The prom will not come with the new ecm and must be carefully removed and installed on the new ecm.There also is a CALPAK in the ECM ( A devise for fuel delivery) This may come with the new ECM But make sure all parts are the same.You should get a vehicle repair manual to do this job correctly,and make sure you do not damage your PROM.Your PROM is very IMPORTANT!