enblethen wrote:
Yes! I am not saying not to take it to a shop, but not dealers.
Many after market shops can do a much better job then most dealers on older model vehicles.
I've only ever been ripped off by "good 'ol Joe at the corner garage".
GM has the specs, diagrams, schematics, tools, and expertise to trouble shoot stuff like this. They built it, and they can service it. They almost always solved my problems with my 2002 Chevy Express van (Roadtrek) in 24 hours or less. One puzzler took all day, but they finally found it. The OBDII codes seeemed to point to a fuel system, or cap pressure problem, but it turned out to be a single corroded sensor wire buried in the bowels of the engine compartment. Found, fixed, and moved on. Yes, they're more expensive than good 'ol Joe, but they fix it and warrant it. I've never needed to take advantage of the warranty, either.