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Automotive question. 2006? GMC Envoy transmission not

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Automotive question

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2006? GMC Envoy transmission not shifting

Mechanic's Assistant: How old is the transmission? Have you noticed any leaking?

Just installed a remanufactured transmisssion

Mechanic's Assistant: Are you fixing your Envoy yourself? What have you tried so far?

Replacing speed sensors. Checked fuses

Mechanic's Assistant: Is there anything else the Mechanic should know before I connect you? Rest assured that they'll be able to help you.

Checked the wiring

Submitted: 1 year ago.Category: GMC
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Answered in 11 minutes by:
10/24/2021
GMC Mechanic: Ian Crabtree,
 replied 1 year ago
Ian Crabtree
Category: GMC
Satisfied Customers: 1,391
Experience: N/A at N/A
Verified

Hello and welcome to just answer my name is ***** ***** am I assisting please Sorry to hear you are having trouble with your vehicle but I am here to help. The system will automatically offer a phone call but I'm unable to take calls at this time. One moment while I review the information. Regards Ian

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GMC Mechanic: Ian Crabtree,
 replied 1 year ago

I would first check the vehicle with an OBD scanner tool as there will most likely be fault codes in the transmission control module once you have these fault codes it will give you more information relating to the fault. I would first get the fluid level checked as if it is low on transmission fluid it can cause these problems also check the fluid if it has been over heated or burnt as it will be dark and have a burnt smell or it It is likely to be a solenoid fault but this should come up on the fault codes or an internal clutch fault.

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Customer reply replied 1 year ago
I just installed a remanufactured trans. The OBX-Ii codes site an ABS faultChanged both speed sensors on the transfer case. Maybe the PCM/ECM ?
GMC Mechanic: Ian Crabtree,
 replied 1 year ago

What fault codes did you have ?

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Customer reply replied 1 year ago
Nothing appears to be transmission related. Just an ABS code. I’d have to get back to the vehicle to look but I cleared the code 3 weeks ago. I have no speedometer and it won’t shift in drive. I can manually shift into second. That is sll
GMC Mechanic: Ian Crabtree,
 replied 1 year ago

Ok iot sounds like 1 of the wheel speed sensors as this can give the symptoms you are describing but you will need to check which wheel speed sensor is faulty.

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Customer reply replied 1 year ago
I checked the one exhaust side. Nothing noticeable. Is there a bench test or are you saying replace them both
GMC Mechanic: Ian Crabtree,
 replied 1 year ago

I am meaning the ABS wheel speed sensors they are located on the wheel hubs.

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Customer reply replied 1 year ago
Yeah I gotcha.
Customer reply replied 1 year ago
Is there a bench test for that or do yoou suggest I just change them?
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