A forked plastic trim tool is ideal for pulling the needles, but be gentle. Be sure to rotate the needles fully counterclockwise until you feel the resting spot of the stepper motor, then put a small piece of blue painter's tape on the gauge face underneath the tip of the needle. Mark the...
^^This^^
And this is just a wild guess, but these clusters can get what's called "silver migration" on the circuit board. The cluster can be disassembled (like when changing stepper motors or backlighting) and the circuit board cleaned. I'm not saying that's what causes this, but it's a...
Your thermostat temp is an opening temp, and the engine will run hotter than that, depending on the efficiency of the cooling system. 200°-210° F is normal.
Did you reset the LTFTs when the injectors were replaced? Those values are learned and could be carried over from the prior situation. Eventually they should get closer to what the STFTs run.
The STFTs show it slightly adding some fuel, well within ideal, so there's that. Those are...
Check out this thread, but continue reading forward once you open it:
https://www.tahoeyukonforum.com/threads/2006-gmc-yukon-xl-slt-plus-gauge-cluster.121659/post-1496541
Moved this thread from Supporting Vendors.
It might help for clarity if you correct your speech-to-text results. ;)
If you don't find the wiring colors, visit a U-pull yard and cut a pigtail off of a like vehicle. Splice like colors.
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