99 Tahoe Maintains speeds even when throttle is "returned"

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tapp1

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No CEL, and the RPMs did not change when put into neural(did not rev).
 

MattM

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replace the iac module on the intake. I just had these same symptoms and after alot of searching and some advice on this forum, I replaced the iac.

had trouble slowing her down, especially when the a/c kicked in.

10 minutes and 67 dollars later, my '99 runs smoothly and predictably again.
 

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