2000 Oldsmobile Bravada Q&A
2000 Oldsmobile Bravada Question: what can cause engine to idle high?
Sounds like a vacuum leak, MAP sensor is not reading proper vacuum. - ProfessorG
I agree with#1 - goodguy
Also, the idle air control valve may be sticking but you need a scanner for testing, not a code reader. Question,, is the transmission shifting like it should? IF not, possible throttle position sensor out of range which will also cause high idle. To test it a scanner is needed again, so i suggest have it scanned to check live sensor data for your problem. - pushrod