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GMC Forum: 04 GMC Yukon stalling and struggling to shift.
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Old 09-03-2019, 02:45 PM
Jfitzth2 Jfitzth2 is offline
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Drives a GMC Truck
Join Date: Sep 2019
Posts: 1
Default 04 GMC Yukon stalling and struggling to shift.

I hope someone can help. Have had my Yukon about 6 months. Have had no issues with it thus far until a couple of days ago. On my way home it randomly started struggling to shift gears. A very hard clunk could be heard when it was shifting. The less I put my foot on the accelerator the better. The stronger I push the accelerator the worse it gets. Also when I come to a complete stop, not always, but my vehicle stalls and I lose all power. Anybody have any thoughts? I took it to a local mechanic and he took it for a test drive. He thinks it could be the u joint or the transfer case. I was also talking to a buddy of mine and he thinks it could be the catalytic converter. The check engine light is on with the following codes:


The check engine light has been on probably a month. I had it in the shop for an EVAP code and the check engine light was taken care of but about a week later it came back on and has been on. Just ran the check engine light reader and those were the codes that came up.

Im not looking to fix it myself but Im hoping to get it narrowed down. Any feed back is appreciated. Thanks 😊
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