2020 Tahoe with 167K miles. Its a former Texas DPS unit but the records show it had a LOT of service/maintenance and new transmission recently. It had the transmission tuned with ZL1 torque converter and DFM tuned out. New GM motor mounts in the last 2 years.
Fresh oil change and oil catch can and a can of fuel injector cleaner.
It has a slight miss at idle and when you drive it then put it in park, the idle climbs to around 900 then back down a few times.
Runs great, no noises at all. No check engine light etc.
Any idea on the idle surging a little and a slight vibration at idle?
Fresh oil change and oil catch can and a can of fuel injector cleaner.
It has a slight miss at idle and when you drive it then put it in park, the idle climbs to around 900 then back down a few times.
Runs great, no noises at all. No check engine light etc.
Any idea on the idle surging a little and a slight vibration at idle?
