Tks man I just went through changing A & B sensors as well and the 03 got worse. Ill try the speed sensor too . Good luck

I replaced my valve body and gaskets and replace the plastic valves in the shift valve bodies with the aluminum valves. Yes it was a little expensive but it is working fantastic now. I got mine from A1 transmission off of Amazon. Get the complete kit. Pillow block and harness and the solenoids. Make sure you torque them bolt's to 40 inch and don't over torque them pounds. I did by accident and popped the top off half the bolt's. There are 3 8mm bolt's on the back end of the valve body and make darn sure that you mark where they go back. Otherwise you won't be able to go anywhere because they will go up inside the housing and stop the clutch body from turning. I did that too. I have a 2002 GMC Envoy with the 4L60E transmission. I learned by my mistakes so now you don't have to. Oh and go ahead and soak the valve body gaskets first, there is 2 of them. 1 is against the valve body and then the plate then the transmission gasket. Match up the gaskets to the one's that come off there should be 2 different sets of gaskets that will come in the kit.

I have a 2003 Envoy with a similar problem and it turned out to be the transmission pressure switch Easy fix

Hey my truck is the same as yours and i just got my transmission rebuilt and its running better i think my mechanic said something about my 3rd gear and 4th burnt out and turned out to be the reason why it was skipin and luckily i got it fixed before it broke down on me

Did you try resetting TCM? I have the exact same issue, the code reader said it was a bad shift solenoid. I replaced the bad solenoid but it continued doing the same thing. I read you can reset the TCM by turning your key to position 2, but don't start it. Then press the accelerator until you hear it click, press through the click and hold the pedal down to the floor. Hold the pedal for 15-20 seconds. While still holding the pedal turn your key back to position one and then release the pedal. Do not remove the key. Sit and wait for about 5 minutes. During those 5 minutes do not turn or remove the key from the ignition, open the doors, use the radio, row the windows down etc. After 5 or so minutes take your vehicle for about a 20 minute drive (500/1000 shifts).

Hey I have a 2004 GMC envoy xl and I'm was driving for work and just went like N nothing in no gear revvv!!!! Like what could it be I need help

Did you try checking the pressure control switch when you changed out the solenoids

Did you ever figure it out. I am having the same problem. My abs is on and sometimes it won't go into 3rd or 4th. Lately it's been going into 4th. I think the abs sensor is a safety device that won't allow the transmission to shift. I just bought a 300 dollar scanner today and all I have is abs codes

maybe a little less talking.. but like the clear camera underneath. Thanks!

Sir did you find any solution for your problem coz i have same problem. Please let me know.

Would this be same application as on a Trailblazer 2003.??

So what was it

Does this video pause halfway thru but audio is still there?

Change catalytic converter that happened to my and it was clogged I replaced it and it's running fine

How come the video is not on I can just hear you

Im just guessing. I think one of your major o rings inside the trans has went out

sir i have same problem pls if you have found the solution let us know and its will be greate help

I have a similar problem but throttle is good. I believe it's the abs sensor not transmission sensor.

Did you ever fix this

Converter is probably plugged

Egr onli

Replacement you RGE

I wish you had stop talking so we could hear what it's doing