Question about 2002 GMC Envoy

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My envoy drive in first speed bot no change to 2 and 3 sped the house transsmision cooler crak i put regular oil transmission bot no change

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If you put regular motor oil in the transmission you will need to have it drained and flushed and it's a good idea to have the filter changed at the same time.

Posted on Apr 03, 2011

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Posted on Jan 02, 2017

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Can the input speed sensor on a 2009 GMC Acadia be changed without having to remove the transmission


Did you do the diagnostic's that go to that code ?
DTC P0717: Input Speed Sensor Circuit Low Voltage
Diagnostic Fault Information
Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance
Input Speed Sensor Supply Voltage
P0717
P0717
--
P0716
Input Speed Sensor Signal
P0716, P0717
P0716, P0717
P0716, P0717
P0716
Circuit/System Description
The input speed sensor (ISS) is a hall-effect type sensor. The sensor faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives 8.3-9.3 volts on the input/output speed sensor (ISS/OSS) supply voltage circuit from the transmission control module (TCM). As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the machined surface of the 1-2-3-4 and 3-5-R clutch housing. This signal is transmitted through the ISS signal circuit to the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and TCM) valve assembly uses the ISS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

Circuit/System Verification
Engine idling, observe the scan tool Transmission ISS parameter while varying the engine speed. The Transmission ISS parameter should change with the engine speed and not drop out.
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Ignition OFF, remove the control valve body cover. Refer to Control Valve Body Cover Replacement.
Connect the TCM harness connector.
Disconnect the input speed sensor (ISS) from the control solenoid (w/body and TCM) valve assembly.
Connect the J 38522 between the supply voltage terminal B and ISS signal terminal A at the control solenoid (w/body and TCM) valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test for further instructions.
Set the J 38522 signal to 8 volts, the frequency to 120 and the percent duty cycle to 50.
Ignition ON, observe the scan tool Transmission ISS parameter. The scan tool Transmission ISS parameter should be between 100-400 RPM.
? If not within the specified range, replace the control solenoid (w/body and TCM) valve assembly.
If all circuits test normal, test or replace the input speed sensor.

Control Valve Body Cover Replacement

Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
Remove the oil cooler inlet hose (1) from the retainer on the control valve body cover.
Remove the oil cooler outlet hose retainer nut (5) from the control valve body cover.
Remove the oil cooler outlet hose (4) from the retainer on the control valve body cover.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove the left engine splash shield. Refer to Engine Splash Shield Replacement.
Drain the transmission. Refer to Transmission Fluid Replacement.

you don't need to pull thr trans .

Feb 19, 2017 | GMC Cars & Trucks

3 Answers

I have a 2004 Envoy. How can water get into transmission if radiator is ok and no flood driving?


there is a vent hose on the top of the transmission,and the hose is suppose to hook to the fire wall,but sometimes it falls down and water gets in the transmission

Dec 10, 2012 | 2003 GMC Envoy

1 Answer

Hi my name is Dana, & my question is: Does the 2006 Envoy XL Denali come already equiped with a transmission cooler or is that something I have to install one myself.


All you have to do is follow the trans cooler lines to
any cooler

Can call a dealer with your VIN # & they will tell you
how it was built

Nov 28, 2012 | 2006 GMC Envoy XL Denali

1 Answer

Transmission slipping on 03 GMC Envoy. what does iy mean when trans fluid measure high on dip stick?


Two things: #1 someone has overfilled it by mistake thinking they were putting oil in the engine. Yes I have seen this.
#2 The transmission cooler in the radiator could be leaking antifreeze into the transmission through the cooling line raising the fluid level. I would look for milk shake foam on the dip stick and make sure you check trans in park and not neutral.

Jan 01, 2012 | 2003 GMC Envoy

2 Answers

I had my car analyzed this morning for the check engine light's on. and result was speed sensor... i want to replace it myself but i don't know where the sensor is..


Hello Edison....
The speed sensor on the 3.5 litre engine in your Malibu is is located on the transmission final drive housing. This is the end of the trans. that the passenger side axle comes out of. It has a 2 wire connector on it. It can be accessed from undeneath the car...Attached is an image of a new sensor. Note the rubber 0-ring. Apply a thin coat of engine oil on it when you install. To not over-tighten. For best performance, replace with an AC Delco brand sensor, estimated cost. $25 dollars.
Hope this will FixYa...seeya next time, and good luck with the Malibu :)
9_1_2011_12_26_06_am.jpg

Aug 31, 2011 | 2006 Chevrolet Impala

2 Answers

Remove starter from 2005 gmc envoy denali. I can't get at the wires to disconnect them.


YOU HAVE TO REMOVE REAR STEERING GEAR CROSS MEMBER.REMOVE THE WIRE HARNESS FROM THE WIRE HARNESS RETAINING CLIPS ON THE TRANSMISSION OIL COOLER LINE BRACKET.REMOVE TRANSMISSION OIL COOLER LINE BRACKET BOLT.REMOVE RIGHT TRANSMISSION COVER BOLT.THEN REMOVE STARTER BOLTS THEN REMOVE STARTER.

Sep 06, 2010 | 2005 GMC Envoy Xl

1 Answer

05 gmc envoy xl v8 starter removal


YOU HAVE TO REMOVE REAR STEERING GEAR CROSS MEMBER.REMOVE THE WIRE HARNESS FROM THE WIRE HARNESS RETAINING CLIPS ON THE TRANSMISSION OIL COOLER LINE BRACKET.REMOVE TRANSMISSION OIL COOLER LINE BRACKET BOLT.REMOVE RIGHT TRANSMISSION COVER BOLT.THEN REMOVE STARTER BOLTS THEN REMOVE STARTER.

Apr 07, 2010 | 2005 GMC Envoy Xl

1 Answer

I have an auto transmission with problems. When the engine is cold I get all the auto transmission speed changes from 1st to 4th, but a few minutes later driving it, it gets like disconnected and I get...


you need to change the transmission oil.After doing that and the problem is still there then check the transmission oil cooler is not blocked.Good luck.

Nov 09, 2009 | 1993 Dodge Caravan

3 Answers

Why is the transsmition oil and water are mix together


The Transmission oil passes through the radiator to keep it cool , If the pipes inside the radiator are damaged then water can enter into the trans lines causing the problem you are having.
Get the radiator checked and repaired/replaced...
Also get the Trans fluid changed as water can damage the trans internals.
Hope this helps.

Jul 21, 2009 | 2000 Volvo S80

2 Answers

I have a 2003 GMC Envoy, trans slipping that I have been towing


Low fluid can cause slipping. (depends upon how low) Most manufacturers post "safe" tow speeds. These are generally ignored. (not good). I recommend towing with driveshafts removed and where driveshaft has a "slip yoke" you install a yoke from a scrapyard and wire it to the tailshaft so it stays in place (keeps oil in and dirt out) Although you can't just detach the tow-bar and drive, it eliminates any possibility of trans damage, since the transmission cannot turn. (most use oil from pump to keep gearsets cool...when towing, pump is not pumping and over time and distance it can damage trans internals.)
Hope your problem is just low fluid and not a rebuild...keep in mind what I said though.

Jun 09, 2009 | 2003 GMC Envoy

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