SOURCE: My 2000 Yukon engine hesitate
Chk MAF sensor (mass air flow) first sensor in ducting coming out of air filter.
* Use only one foot on the gas peddle - Just teasing. :)
SOURCE: 2000 Yukon Denali high idle? no check engine light
it can be adjusted at the cable end on engine could be the computer doing it to.
SOURCE: my 2000 yukon xl air conditioner blows hot air in
Have the air conditioning system checked. It is probably low on freon or clogged. Check the condenser in front of the radiator to be sure that it is clean and not obstructed. If there is an auxiliary fan for the air conditioning system, make sure that it is working too. At low speeds air conditioners are less efficient and some require an extra radiator fan to work at slow speeds.
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