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Codes P0700 code P0717, transmission is shifting hard from first to second gear

Tiny
BIG LOS
  • MEMBER
  • 2009 CHEVROLET SILVERADO
  • 200,000 MILES
Truck listed above has a 4.8L V8. L Truck shifts from 1st to 2nd hard which put on engine light and threw P0700 code and a P0717 code. I’ll park the truck jump in it again sometimes it’s still on the check engine light sometimes it off I won’t hard shift again until maybe a day later could be two days. I think it’s an electrical issue. I’ve replaced the solenoids. The transmission has been rebuilt before.
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Saturday, May 29th, 2021 AT 12:10 PM

13 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

The P0700 code is related to the TCM-transmission control module and the code P0717 is related to the transmission input speed sensor. I've attached picture diagnostic steps below for both codes on your truck. Get back to us with what you find and we'll go from there. Here is an electrical testing tutorial:

https://www.2carpros.com/articles/how-to-check-wiring

Hope this helps and thanks for using 2CarPros.
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Saturday, May 29th, 2021 AT 8:11 PM
Tiny
BIG LOS
  • MEMBER
  • 6 POSTS
Sorry it’s been a minute, haven’t been able to work on truck, raining every evening when I get home and all weekend. Trying to get to it today if it doesn’t rain. Can you send me a wire diagram for wiring going back to the TCM from the transmission?
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Saturday, July 10th, 2021 AT 3:51 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Here is the diagram you requested. I've cut the pictures into 3 pieces so you can view larger. Keep us updated. Hope this helps and thanks again for using 2CarPros.

Danny-
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Saturday, July 10th, 2021 AT 10:32 AM
Tiny
BIG LOS
  • MEMBER
  • 6 POSTS
Thanks Danny. I dropped pan, changed transmission oil, filter, and torque converter clutch solenoid. Checked all wire connectors inside pan by valve body, everything looked good. In order to change the Input turbine sensor, you need to drop the transmission I figure if I’m going to drop it I might as well rebuild it so I put everything back and around the truck it hasn’t done it yet let me check it out for the next day or two and I’m going to trace the wires from INput turbine sensor to PCM and possibly ground that to the chassis if I get hard shift from 1st to 2nd again. Dropping the transmission will be last thing I try if grounding and what I have done today don’t work. Started raining so I should get back to you tomorrow thanks again for all your help you guys are a blessing. Thanks 2CarPros. I will get back to you all in a couple days.
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Saturday, July 10th, 2021 AT 2:02 PM
Tiny
BIG LOS
  • MEMBER
  • 6 POSTS
I’m getting to work on truck today, it’s been raining everyday. Can you send me a wiring diagram for 2009 Chevy Silverado 4.8 V-8 transmission sensors-TCM?
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Sunday, July 11th, 2021 AT 10:26 AM
Tiny
BIG LOS
  • MEMBER
  • 6 POSTS
Hello again,

I ended up tapping into the ground wire, the black and white stripe from the TCM and ran it to the chassis right below, driver side Just added it with the other ground that’s already there I believe it’s from the fuel pump. I’ve been driving it for 45 minutes now no problem I’ve been dogging the truck, trying to get it to start shifting hard again but so far so good. I’ll keep you informed within the next couple days and let you know if I come back on. I did end up putting it back on the scanner after clearing the codes when I grounded it and I had no trouble show up. I’m hoping to contact you in two more days and let you know that the problem hasn’t happened again. Until then, have a great day.
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Tuesday, July 13th, 2021 AT 1:55 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

You're welcome! Keep us updated. We're here to help. Thanks again for using 2CarPros and we hope you will use our site again in the future when needed.

Danny-
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Tuesday, July 13th, 2021 AT 8:43 PM
Tiny
BIG LOS
  • MEMBER
  • 6 POSTS
I forgot to add these pics with last message.
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Tuesday, July 13th, 2021 AT 9:49 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Thanks for sharing! Keep us updated as to this shifting issue and fix. Thanks again for using 2CarPros.

Danny-
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Tuesday, July 13th, 2021 AT 9:57 PM
Tiny
BIG LOS
  • MEMBER
  • 6 POSTS
Hey Danny, it shifted hard from 1st to 2nd again so I cut into the same ground wire closer to where it is grounded on the right front engine block, and grounded to chassis in the front near headlight. I also got a PO13A code which is a O2 sensor bank 1 sensor 2 which I purchased just haven’t changed yet, so far so good. It has been since Saturday running well. Thanks
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Monday, July 19th, 2021 AT 8:12 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Here is a tutorial showing how to replace Oxygen sensors:

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

I've attached picture diagnostic steps for code P013A and how to replace the oxygen sensor on your Ford truck. Keep us updated and we'll go from there. Hope this helps and thanks again for using 2CarPros.
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Tuesday, July 20th, 2021 AT 7:06 PM
Tiny
MZT100
  • MEMBER
  • 3 POSTS
What gauge wire did you use to splice into the TCM?
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Saturday, July 9th, 2022 AT 4:32 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
You can use a 14-gauge wire, it should be okay. Let us know what happens and please upload pictures or videos of the problem.
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Sunday, July 10th, 2022 AT 1:18 PM

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