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    Dashnoard extension panel in cocoa for 2012 Yukon

    Still available new but the prices are naturally insane. Mine finally developed a crack on one end and some of the hold down tabs are broken.
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    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    I wonder if the PCM is seeing a pressure drop and thinking it's the sensor. Wouldn't higher ethanol percentages correlate to a longer injector cycle? Also, maybe you have a leaky injector as well compounding things. This is going on the possibility of a high ethanol content. Do you have an app...
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    Instrument cluster lights turn off when map light is turned on

    I put it back together, disconnected the battery for 30 min and restarted everything just to see what happens, still no change. I'm also wondering again about the rear parking sensor fault....this diagram also includes the dimming feature but will dive into it tomorrow...
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    Where is the ground wire under the radiator?

    Nm, I thought it was on the LH side, is on RH side..my mistake.
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    Where is the ground wire under the radiator?

    I want to verify the integrity of this ground connection, but I cannot find it. I have the lower splash guard off, headlight out, and the fender liners pulled back, no sign of it. I'm sure it's there, if anyone has a pic or a better description of it's location please chime in. Thanks.
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    Instrument cluster lights turn off when map light is turned on

    I'm not well versed in reading schematics, I understand the basics, but I'm getting some time in on this project for sure..lol. All the grounds for the interior map lights and courtesy lights which house my issue, all go through G200 correct? I checked the RH visor ground wire at the headliner...
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    Acceleration hesitation

    Something to consider, if this also started after you filled up... given the price of gas right now it's a safe bet more 93 is not being replaced as quickly as 87. To get 89, the pumps mix the 87 & 93. Not likely but you could have some older gas mixed in with the 87...not as likely but a...
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    Acceleration hesitation

    Yes. I'll find a screenshot or a short video to show what I look at using the Torque Pro app. You can watch the graph as they change voltages, they are lazy at idle but while driving it's a rapid sawtooth graph.
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    Acceleration hesitation

    Make sure you hear the "click" on each coil pack when installing the wires, they can be stubborn. I tried the aftermarket wires on my 2012 Yukon and ended up switching to the OE, had some erratic fuel trims but nothing too crazy. I always try to replace the upstream sensors with the plugs, JMHO.
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    Acceleration hesitation

    You said you used AC Delco Iridiums but didn't mention brand of wires, were they OE? Did you try to gap the plugs? Reason I ask is that can break the tip off. At cruising speed, are BOTH upstream sensors updating at the same speed and rapidly? Is the gasket on the TB good, torqued to spec...
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    Instrument cluster lights turn off when map light is turned on

    So this saga keeps gaining twists...lol. Adding to the edit above I DO have continuity from the NEG bulb terminals to the end of the pigtail of the visors, but my ohms was reading "OL" with the harness connected to the headliner harness...I was basing it off the reading and not using continuity...
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    Acceleration hesitation

    Was it running fine on the highway before you changed the plugs, wires, cleaned MAF and TB? What did you use to clean the MAF meter? If brake cleaner was used, it can possibly damage the sensor causing incorrect readings to the PCM. Double check your plug wires and makes sure they are fully...
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    Instrument cluster lights turn off when map light is turned on

    I wanted to mention that I edited post #54 above in case anyone has already read through it. At the time I did remove both visor connectors, but I did not check resistance to ground from the harness coming from the headliner...not sure why but I think becasue I was trying to finish up before I...
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    Instrument cluster lights turn off when map light is turned on

    I had to edit this post below at the red 'Edit" but wanted to mention here in case anyone has already read through it I was able to get under the dash and spend some time probing and trying to figure this out. With both visors removed, there was no change. I have 13.4V at each visor pigtail...
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    Instrument cluster lights turn off when map light is turned on

    Can I reset the BCM with the Tech 2?
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    Instrument cluster lights turn off when map light is turned on

    Oh, no worries there, I planned on buying a new OE spare anyway. At least I can test my current BCM and if I do anything to it I have a spare. I looked back at my LED light order and I don't see any "Anti-Flickering" options with my bulbs but might be an add-on option. I have read of issues...
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    Instrument cluster lights turn off when map light is turned on

    That makes sense...does it dim the surrounding buttons of the radio? That's what mine is doing during the day with the lights on, but not the nav screen.
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    Instrument cluster lights turn off when map light is turned on

    Something to add, if my lights are on in the day, my dimmer knob will dim the lights around the radio/hvac, and pressing the map light button has no effect on the IC lights or lights around the radio....only when the optical sensor senses the dim light and sets the interior lights to their...
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    Instrument cluster lights turn off when map light is turned on

    Today I unplugged the LED fogs and LED low/high beams...no change. I have unplugged the LH visor and no change, have not done both yet. The pic of the visor light socket was to show where I was probing. I only removed the LH bulb in the LH visor to check for voltages. I put a clamp meter...
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    Instrument cluster lights turn off when map light is turned on

    I'm sorry, I misspoke....not when I pull down the visors, only when I open the vanity mirror door.
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    Instrument cluster lights turn off when map light is turned on

    What happens is, with the doors closed, headlights on, also with the ambient being dark so the dash sensor now dims the dash for evening illumination intensity, or if I cover the photo sensor during the day for this test..if I select ANY of the 4 overhead map light switches, the IC lights will...
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    Instrument cluster lights turn off when map light is turned on

    I did this AM..both are good. This junction looks like it's worth a look, now I just need to find it if not the actual connector to the BCM.
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    Instrument cluster lights turn off when map light is turned on

    No not yet, but all the dome lights work. All the map lights work as well with the door open, they just won't turn on with the door closed, but the map lights will turn on when I turn the interior dimmer switch to the 'ON" position.
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    Instrument cluster lights turn off when map light is turned on

    With the mirror cover closed, I have 'OL" measuring ohms to ground on both terminals, cover open is 1.8 M Ohms to ground.
  25. D

    Instrument cluster lights turn off when map light is turned on

    Yes, all 4 visor lights are out. For this test, I have 12.25V at the battery. I haven't pulled any harness yet, but I removed the driver's side cover on the LH light.... with the mirror cover open, I have .171 V to ground on the top terminal, and .188 V to ground on the bottom terminal...

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