Highter Than Nornal Idle Due to Vacuum Leak on Chevrolet Suburban 1500

An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.

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Average mileage: 194,000 (190,000–198,000)
Engines affected: 5.7L V8, Gasoline
5 model years affected: 1992, 1993, 1994, 1995, more2003
6 people reported this problem
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Viewing 1 - 2 of 2 problem details
2003 Chevrolet Suburban 1500 - 5.7L V8 198,000 mi,
I was driving on the highway. Next thing I know, the car is bucking like it was choking on something. After that incident, the truck had to be in drive 2 and won't go faster than 45 without the rpm racing up to 4,000rpm. I checked the egr valve, I changed out transmission fluid ,did oil change. Talking about timing. Other than the book,I'm not doing much. There's not much in the wave.
1995 Chevrolet Suburban 1500 190,000 mi,
High idle, sputtering. Fixed high idle and check engine light.