Question about Chevrolet Avalanche

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2007 chevy avalanche. The information panel has quit working and it seems to be in limp mode. It won't shift out of first gear. It all happened at the same time. Is there something I can check

2007 chevy avalanche. The information panel has quit working and it seems to be in limp mode. It won't shift out of first gear. It all happened at the same time. Is there something I can check before I take it to the shop. Thank you

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The first thing to do is to have the codes read. With this information to hand you will be able to determine if the shop knows what they are on about.

Posted on Nov 07, 2014


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Posted on Jan 02, 2017

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SOURCE: My avalanche won't shift

Sounds like a broken internal trany part. Take it out and shift it through the gears manually to see which gears work and where it revs up. The second and fourth gears are the ones that tend to not work.

Posted on Oct 11, 2009

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SOURCE: 2007 Jeep liberty auto trans will not shift from 2nd


Posted on Jul 07, 2009

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SOURCE: Chevy Avalanche horn stopped working

you may have bad horn, take a test light and see if power is going to horn when horn is pushed, if theres power going to it then you have a bad horn,if theres no power to it then check the horn relay. but il bet if the fuse is good then the horns are bad.

Posted on Mar 01, 2010

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SOURCE: 2007 chevy equinox codes p0700 &p0705. van

P0700 Transmission Control System Malfunction, this comes on anytime a problem is sensed in the transmission
P0705 Transmission Range Sensor Circuit malfunction(PRNDL Input)
this means that the circuit that signals the transmission control module when u slect a gear (Drive reverse etc.) has a problem, this can be the range selector switch or the wiring connector or the control module, in order to pin down which part is causing the fault code the Chevy dealer must hook up a scan tool called a "Tech II" and read the transmission data as the different gear requests are made.

Posted on Sep 28, 2010

  • 239 Answers

SOURCE: 2000 chrysler 300m

The 700 is the limp mode, as I recall. One or both of the sensors are failing, and they are not too expensive to replace. Once replaced, then using the OBD tool, you can delete the fault codes and then be able to shift into all the gears.
I have written about this solution in other blogged questions, and so have others. Under the car, on the Driver side of the transmission are two electric sensors. They lay horizontally on the trans just behind where your foot would go on the accelerator and under the floorboard. The electricl clip sockets pull out with thumb pressure on each socket. DO NOT pull on the wires EVER. Unplug each socket, and replace one at a time. Use a 1" deep well socket and unscrew them from the side of the trans casing. Do one at a time starting with the one on the left, the Input side,; Then the output side.
The reason why I replace them both is that they are cheap- about $20 apiece- and REALLY: do you want to go under there twice for twenty bucks? If so, then just replace the one on the LEFT- the Input sensor. You then MUST RESET THE CODES with the OBD tool for the transmission side of the tool, then GO!

Posted on Dec 05, 2011

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My avalanche won't shift

Sounds like a broken internal trany part. Take it out and shift it through the gears manually to see which gears work and where it revs up. The second and fourth gears are the ones that tend to not work.

Oct 11, 2009 | Chevrolet Avalanche Cars & Trucks

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