Problem Description and Possible Solution
A dirty throttle body may cause a lower than normal idle and possible stalling condition. Performing a throttle body service will commonly correct this concern.
Average mileage: 129,090 (78,000–216,670)
19 people reported this problem
STalling ,Erattic idle speed, Cleaned Throttle Body,Ok now
Avalanche would start normally and run at low idle speed while engine was cold. After the engine warmed up, it would stall every time I took my foot off the accelerator. My mechanic, Gene, cleaned the throttle body and it's been running fine so far (two days, 50+ miles).