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  1. DTC's, Problems & Troubleshooting
    Hello everyone, Recently did a head-gasket and intake gasket replace on my '99 buick park avenue, natural aspirated. The intake gasket was cracked/corroded from dex-cool eating plastic and the back head had plugged coolant ports from bad coolant maintenance from the previous owner. All seems...
  2. DTC's, Problems & Troubleshooting
    Hey all, I have a few questions I hope the great minds on this forum can help with. 2008 Grand Prix, all stock, well maintained 166,000 miles, engine was running great until about three weeks ago. Started up and ran down my driveway fine as always, but suddenly lugged and sputtered horribly...
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