Question about Chevrolet Silverado 1500

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1999 Silverado 2WD,V6,4.3 automatic transmission code say shift solenoid P0753 possible cause shift solenoid circuit Problem is only second and third gears are working no matter if I shift it,park,reverse and neutral still good -Replace all shift solenoids -Install a new speed sensor -transmission pump is good -transmission fluid good -not towing at all -162,250 miles -all connections are good Running outta money need the truck so I can go work,again HELP!!! please (919)455-1681 at any time,getting desperate

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  • luis_cj98 Sep 24, 2009

    It was more complicated than what I expect but I definitely think that something from this info must be the reason of my problem,thanks a lot

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Hi,

I am sorry to hear regarding your problem. I know it's frustrating. There is already a Technical Bulletin issued in this regard :-

Subject: MIL On, Transmission Stuck in Second or Third Gear, IPC Inoperative, DTCs P0740,P0753,P0758,P0785,P0787,P0973,P0976,P1860,P2761,P2764 and/or P2769 Set (Verify and Repair Source of Voltage Loss #01-07-30-002E - (09/23/2005)
Models: 2006 and Prior GM Passenger Cars and Light Duty Trucks 2005-2006 HUMMER H2 2006 HUMMER H3 2005-2006 Saab 9-7X with 4L60-E, 4L65-E, 4L80-E or 4L85-E Automatic Transmission (RPOs M30, M32, M33, MT1, MN8)

This bulletin is being revised to update model years, add additional models and add additional diagnostic information. Please discard Corporate Bulletin Number 01-07-30-002D (Section 07 -- Transmission/Transaxle).
ConditionSome customers may comment on one or more of the following conditions:
• The Malfunction Indicator Lamp (MIL) is ON. • The transmission is defaulted to second gear (4L80/85-E). • The transmission is defaulted to third gear (4L60/65-E). • The instrument cluster is inoperative.Upon investigation, one or all of the diagnostic trouble codes (DTCs) P0740, P0753, P0758, P0785, P0787, P0973, P0976, P1860, P2761, P2764 and P2769 may be set depending on the vehicle.
CauseThe most likely cause of this condition may be a loss of voltage to the transmission solenoid power supply circuit.
This condition may also be the result of an incorrect installation of an aftermarket electronic device such as a remote starter or alarm system.
CorrectionImportant: If the vehicle is equipped with an aftermarket electronic device and the DTCs are being set when the device is being used, verify that the appropriate fuse is being supplied battery voltage during operation. If voltage is not present at this fuse, these DTCs will be set due to lack of voltage at the solenoids. This condition is most likely to occur with an incorrectly installed remote starting system. If this is the case, refer the customer to the installer of the system for corrections. ANY REPAIRS DUE TO AFTERMARKET INSTALLATION OF ACCESSORIES IS A NON-WARRANTABLE ITEM.

  1. With the ignition switch in the RUN position, test for battery voltage at the circuit fuse in the transmission solenoid power supply circuit. Refer to the appropriate SI Document for the transmission solenoid power supply circuit information.
  2. If battery voltage is present at the fuse, inspect the ignition voltage circuit between the fuse and the transmission for possible opens.
  3. If battery voltage is not present at the fuse, test for continuity between the fuse and the ignition switch. If NO continuity is between the fuse and the ignition switch, repair the open in that circuit.
  4. If you have continuity between the fuse and the ignition switch, the most likely cause is the ignition switch. Replace the ignition switch using the appropriate Ignition Switch Replacement procedure in SI. Refer to group number 2.188 of the parts catalog for part description and usage of the ignition switch.
It very well may be the IPC faulty but I just wanted you to be aware that the ignition switch can give you the same symptoms and then some. They are prone to fail on these trucks and when they do the PRNDL may be inop, cluster goes dead, transmission stuck in 2nd or 3rd gear, key won't turn from on, shifter stuck in park, etc. If you feel confident they diagnosed it needing a cluster then have the cluster replaced and retest. I have seen clusters go bad and cause the same symptoms you have.

The General solution of P 0753 is :-

1999 Silverado 2WD,V6,4.3 automatic transmission
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CIRCUIT DESCRIPTION
The 1-2 Shift Solenoid (SS) valve controls the fluid flow acting on the 1-2 and 3-4 shift valves. The solenoid is a normally-open exhaust valve. With the 2-3 SS valve, the 1-2 SS valve allows four different shifting combinations. The solenoid attaches to the control valve body within the transmission. The 1-2 SS valve receives ignition voltage through circuit 1020. The Powertrain Control Module (PCM) controls the solenoid by providing the ground path on circuit 1222.

When the PCM detects a continuous open, short to ground or short to power in the 1-2 SS valve circuit, then DTC P0753 sets. DTC P0753 is a type B DTC.

CONDITIONS FOR RUNNING THE DTC
  • The system voltage is 8-18 volts .
  • The engine speed is greater than 450 RPM for 5 seconds .
  • The engine is not in fuel cutoff.
CONDITIONS FOR SETTING THE DTC
DTC P0753 sets if one of the following conditions occurs for 5 seconds :

Condition 1
The PCM commands the solenoid ON and the voltage feedback remains high (B+).

Condition 2
The PCM commands the solenoid OFF and the voltage feedback remains low (0 volts ).

ACTION TAKEN WHEN THE DTC SETS
  • The PCM illuminates the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
  • The PCM commands D2 line pressure.
  • The PCM inhibits 3-2 downshifts if the vehicle speed is greater than 48 km/h (30 mph) .
  • The PCM freezes shift adapts from being updated.
  • The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
  • The PCM stores DTC P0753 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.
CONDITIONS FOR CLEARING THE MIL/DTC
  • The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.
  • A scan tool can clear the MIL/DTC.
  • The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.
  • The PCM cancels the DTC default actions when the fault no longer exists and/or the ignition switch is OFF long enough in order to power down the PCM.
DIAGNOSTIC AIDS
  • Inspect the connectors at the PCM, the 1-2 SS valve and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent and Poor Connections in Diagrams.
  • Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Diagrams.
  • Refer to the Shift Solenoid Valve State and Gear Ratio table.
TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
  1. This step tests the function of the 1-2 SS valve and the Automatic Transmission (AT) wiring harness assembly.
  2. This step tests for power to the 1-2 SS valve from the ignition through the fuse.
  3. This step tests the ability of the PCM and of the wiring to control the ground circuit.
  1. This step measures the resistance of the AT wiring harness assembly and of the 1-2 SS valve
Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!


Posted on Sep 24, 2009

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Sometimes with code readers they get confused an just throw any old codes . Have it checked by someone with GM Tech 2 scan tool .

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What does code po753?


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Oct 03, 2014 | 1996 Honda Accord

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I have 2004 gmc envoy xl 5.3 engine the code po753 is showing up


You are starting to have a transmission problem. I know....the Envoy runs fine....well, this code is telling you that there is a beginning of a problem with your transmission system. It could be a wire, could be a rock that was ran over flicked up under there and possible damaged something.....
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A/T 1-2 Shift Solenoid Circuit Malfunction (4L60-E, 4L65-E)
Trouble Code Conditions:
Engine runtime over 5 seconds, system voltage at 10-18v, engine not in Fuel Cutoff mode, and the PCM detected an unexpected voltage condition on the A/T 1-2 Shift solenoid circuit.
Possible Causes:
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  • 1-2 shift solenoid control circuit is shorted to system power
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Aug 25, 2014 | 2004 GMC Envoy

1 Answer

P0753



P0753 - Shift Solenoid A Electrical
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 'A' valve
- Shift solenoid 'A' valve harness or connectors
- Shift solenoid 'A' valve circuit is open or shorted


Read more: http://engine-codes.com/p0753.html#ixzz31EB1WygL


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Let me give more history on the question, replaced 98 Cherokee auto transmission with 2000 tranny. DTC code P0753. DBR says short to ground, no communication from TCM to PCM. Electrical problem occurs...


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Aside from getting into an accident and having your wiring harness severely damaged, the other likely suspect is your PCM. These codes are not related to each other and indicate a much larger problem.

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P0753 - Shift Solenoid A Electrical.
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1 Answer

I changed the 3-4 shift soleniod but now i dont have any gear but 2nd and before we had 1-3 just not over drive. what could have went wrong?


There is no code that tells you to replace the shift sdolenoid. There is a code (P0783) That has a generic description of "3-4 Shift Malfunction". Please note that there are several things that can cause this code. This code DOES NOT mean to replace the shift solenoid without first diagnosing the other possible causes of this code.
P0753 is for the "3-4 Shift Solenoid/Transmission Relay Circuit" If this is the code you had, please note that this code is a CIRCUIT code. The circuit includes the 3-4 shift solenoid, the transmission power relay and all the the wires and connectors connecting the power relay, the solenoid, and the PCM together. In this case the CIRCUITS must be diagnosed prior to replacing ANYTHING.

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I would recommend starting over to see what codes you now have and diagnose the system accordingly.

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