2002 duramax 4x4 crewcab service engine soon light

basswall · #1 02-19-2011, 05:08 AM

I bought this truck in Palm springs and drove it to Olympia,Wa. when I got to Reno the next day sometime the light came on.When I entered the mountain area on highway 395 and started using the 4Hi 4x4 on the truck with the snowy roads the light went out.But then again I read the manual and it could be the fuel I'm filling up with?? Anyway,after going back to 2 wheel drive and losing elevation the light came back on. What is going on with this truck? Any takers? Thanks Chris

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Worf · #2 02-19-2011, 05:15 AM

You need to pull the codes and let us know what they are so we can help you

basswall · #3 02-19-2011, 06:14 AM

Okay.How is the cheapest(best)way to "pull codes"

Thank You Worf

Worf · #4 02-19-2011, 07:16 AM

You will need a OBD-II reader or scan tool. You can pick up a basic code reader that will show you what codes have set and basic emission information from a autoparts store in your area.

Or if you have a wal-mart near you, I was able to pick one up there for $99.99 they are well worth the investment.

basswall · #5 02-20-2011, 02:40 AM

Okay, will do asap. Now tonight the damn thing is stuck in like 2nd or 3rd gear. I checked the tranny fluid and it is low.Will this cause it to not shift properly? It makes a loud noise when I shift it in and out of gear also.

Thanks,Chris