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2020 GMC Sierra 1500

Ja-Rod
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Ja-Rod New Member

Ja-Rod

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Hey all I'm wondering if anyone has experienced anything similar to my ordeal? So I have a 2020 GMC Sierra 1500 5.3 V8. It only has 1500 miles on it and we just pulled our camper with it which only weighs 4500#. It pulls fine doesn't squat much and I use a weight distribution hitch. We took it to the campsite unhooked and I parked the truck. The next morning I started up the truck and the service engine light came on. After about 5-6 starts it cleared and is no longer on. It seemed to drive fine even when the check engine light was on. I'm wondering if me parking the camper going forward and reverse a few times made the gas mileage so bad it triggered the warning light?

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