Question about 2004 GMC Envoy
Premium gas is a waste of money. domestically produced and sold cars are actually calibrated for econo gas. well, based on what you told me and the type of vehicle, i'd invest in some well-needed maintainence (COMPLETE tune up with AC Delco platinum plugs, fuel filter, air filter, pcv, cap and rotor) don't skimp on cap quality either- told ya -they're problem-prone. BUT with the "check gauges" light coming on, my bet is you're experiencing the warning signs of imminent fuel pump failure. gas gauge been bouncing or not reading accurately?
Posted on Jun 23, 2009
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Posted on Jan 02, 2017
Try the fuel filter. Sounds like the engine might be running rough due to weak fuel pressure. Its cheaper to replace, especially if it's still original from 04. Try running some injector cleaner through a couple of tanks of high octane gas.
Posted on Aug 06, 2008
Either you have a vacuum leak or electrical issue.
First Inspect all vacuum lines.
Next test engine vacuum (17-21 hg's)
If all a-ok then its electrical and you got your work cut out for ya.Have to probe the circuit to see where its shorting and what its shorting to. I don't think it will be electrical simple because you would be blowing fuses if it was. Sounds more vacuum related..... and thats worse.
Posted on Mar 24, 2010
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