Smiley78
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18 Denali won’t go past 85 mph
Smiley78 replied to 18siknali6.2's topic in Troubleshooting & Recalls
I have the same issue with my 2017 suburban. Before I could get up past 85 mpg . Now it shuts down at 85mph like there is a speed limiter on it. I have had the tires calibrated. I also have the suspension light come on from the factory air suspension being disconnected. Have had the 6” lift for years now and 35” tires on it, it just all of sudden started happening.
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