This solved my issue quickly. Thought this might help one of you guys. It is usually a grounding issue.
https://www.tahoeyukonforum.com/threads/reduced-engine-power.111769/
Also, there are two grounds under the chassis under the driver seat. Take the bolts off and thoroughly clean the leads and the chassis with a wire brush for clean ground connection.
These two items will solve most of the issues. There is also ground wire at the back of the engine on the passenger side that I mention in the video.
Best wishes.
https://www.tahoeyukonforum.com/threads/reduced-engine-power.111769/
Also, there are two grounds under the chassis under the driver seat. Take the bolts off and thoroughly clean the leads and the chassis with a wire brush for clean ground connection.
These two items will solve most of the issues. There is also ground wire at the back of the engine on the passenger side that I mention in the video.
Best wishes.
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