Truck Forums - i have a 2000 gmc seirra 5.3

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romirom

03-03-2008 07:19 PM

i have a 2000 gmc seirra 5.3

My truck just started acting up you can crank it up and it will idle fine but if you drive it and stop and put it in park or neutral it idles up to about 1 and you can cut it off and on a few times and it will stop what is the problem

jcbst12

03-04-2008 08:37 AM

RE: i have a 2000 gmc seirra 5.3

Could be:

* AIC gone bad
* PCV clogged or stuck
* Vacuum leak
* EGR but I doubt it

romirom

03-04-2008 07:10 PM

RE: i have a 2000 gmc seirra 5.3

some body told me that it was the throttle position sensor

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