Having this issue on my wifes 15 denali as well. Will be replacing the OEM battery cables as I had this issue with our previous Yukon (08 Denali 6.2 AWD) I replaced the cables and added some additional grounds from block to firewall and block to chassis. It did fix the electrical gremlins in the...
Hey all. New to the forum, but not new to GMTs. My previous Yukon (08 6.2 AWD) had the notorious battery cable issue that plagued the entire electrical system. Is this a common theme with this newer generation as well? The truck is very sluggish to start (hot or cold) and apparently the...
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