I'm chasing this myself on my 06 TB. Start with the basics before you have a smoke test done. Make sure there are no leaks post MAF sensor. Clean MAF sensor. Make sure intake bolts are not loose (very very common). I've done all this, will have a smoke test done next, which should reveal I have a cracked intake manifold (it's plastic!) or leak there.
I HAVE A CHECK ENGINE LIGHT HELP PO171 CODE IS PO171
2008 GMC Envoy
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Maintenance & Repair
my engine is running high when i first start it and runs rough, but after it gets into 3 rd gear its fine
2002 GMC Envoy 4 Dr SLT 4WD SUV
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Maintenance & Repair
IT HAS HAD A RECENT (1000 MI) ON TRANSMISSION SERVICE... COULD THIS BE ANY ISSUE. IT WAS OVERFILLED ALSO. BUT THIS SEEMED TO LEAK OUT FURTHER TOWARDS REAR OF UNIT.
2006 GMC Envoy Denali 4WD
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Maintenance & Repair
My 2005 Envoy is idling high making a hissing sound under the HUD and lunging forward
2005 GMC Envoy
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Maintenance & Repair
I have a 2000 GMC Jimmy Envoy diamond edition. The light keeps going on and off on the dash. I went to Auto zone and they said it could be the wire or if its the fuse they do not know which one it wou...
2000 GMC Envoy 4 Dr STD 4WD SUV
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Maintenance & Repair
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