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2002 gmc envoy_slt
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549 Posts
There are hydrocarbons in the oil... Now I will check the threads on head gaskets i suppose.
Hydrocarbons in the oil is normal. Hydrocarbon gases in the coolant system in not normal. Did you do a hydrocarbon test on the cooling system? If so did it come up positive for hydrocarbons? If so, then it's definitely a head gasget. c good
 

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Premium Member
2004 chevy trailblazer_lt
Joined
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2,561 Posts
Dwall, Welcome to the Forum!

Please start a new thread and include which engine, mileage, what DTCs are present, any other recent work performed, etc.

This way we can focus on you and your problem and not have to worry about zombies appearing since this is an old thread.

Good Luck!!
 
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