Re: 99 Silverado Rough Start
Pulled the TB and cleaned the back side of the throttle plate and the IAC passage and control. Lots of crud on everything. Tried to check fuel press, but my gauge kit is missing the GM adapter. Starts and idles fine now, even after sitting overnight, but it didn't start hard on every try before, so it doesn't mean much. I still need to get the fuel press gauge on it. Cleaning the TB was way too easy. Things are never that simple in life. This is a great site. Thanks to all who posted replies. I will keep you posted on the progress.
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72 GMC Sierra Grande SWB 402 BB A/C
(Owned it since 1973)
99 Silverado 1500 LT with 315K miles
(RIP)
2012 GMC Sierra SLT
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