SOURCE: 2001 GMC Denali 6.0 does not have a smooth idle.
The problem with the 01 Denali I'm envolved in fixing is too low of idle. My scanner is showing random misfire on six of eigth cylinders but goes to zero count when idle is raised to 800 rpm. Going to remove the throttle body this time and thoroughly clean it to see if I can get the correct idle back.
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