GMC Envoy 2002

2002 GMC ENVOY
95,000 MILES • 6 CYL • FWD • AUTOMATIC
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BRAVESFAN48
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The engine in my 2002 GMC Envoy seems like working on 5 cylinders only. Could that be spark plugs or something else?
Dec 1, 2010 at 4:08 AM
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JACOBANDNICKOLAS
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  • 110,194 POSTS
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It could. Has the check engine light come on?
Dec 1, 2010 at 4:09 AM
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BRAVESFAN48
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  • 3 POSTS
No, I noticed more exhaust smell than usual.
Dec 1, 2010 at 4:13 AM
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BRAVESFAN48
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  • 3 POSTS
Also engine vibrates more than usual.
Dec 1, 2010 at 4:27 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
If the check engine light hasn't come on, it leads be to think it could be related to the fuel system or even a catalytic converter that may be plugging. Check fuel pressure and the cat to confirm they are both good. If they are, there is a chance that the check engine light may be burned out.

Check those and let me know what you find.
joe
Dec 2, 2010 at 12:09 AM
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