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Figured out how to keep steady voltage
The fluctuation is on purpose. From what I understand this is for highway fuel economy. The alternator cuts off so the fuel economy goes up, but your battery drops. It then kicks back in when its low and charges it back up.- chopperwalker
- Post #17
- Forum: Audio & Electronics
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09 Yukon fuel pump/control
So my local shop said the fuel pump is good, but the ECM was going crazy. They can't program it and said the dealer needed to do it. I had it towed to the dealer, but apparently the local shop cleared all the codes. This matters bc they dealer found nothing wrong. They couldn't reproduce the...- chopperwalker
- Post #5
- Forum: Engine & Drivetrain
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09 Yukon fuel pump/control
I'm at 175K. Its at the local shop now for diagnosis Sent from my SCH-I535 using Tapatalk- chopperwalker
- Post #3
- Forum: Engine & Drivetrain
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09 Yukon fuel pump/control
My wife drove through a large puddle. The sel came on shortly after. It killed a little while later. I net her and it stared for me prob 5 minutes after it killed. Got it home and checked codes. All related to fuel pump or fuel control model. Next day I checked and there were less codes and I...- chopperwalker
- Thread
- Replies: 4
- Forum: Engine & Drivetrain
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New from Kansas City
Just picked up a White 2009 Yukon. I couldn't justify having an SUV before, but now my commute is less than 2 miles to work. Very happy with the purchase and have already started upgrading. I have been reading this forum for a couple of weeks now and will start becoming more active. I am a...- chopperwalker
- Thread
- Replies: 1
- Forum: Introduction
