GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello, I'm Cam. Please include all the details about your issue so I can accurately advise you. I cannot see your vehicle so please be detailed.
Does it smell if you use the blower with the key off?
sorry engine off and key on?
no there i dont notice any smell then if you turn the blower off and open the windows let it air out close the windows it seems fine but as soon as you turn the haet or a/c on you can smellit
So physically running the engine is what is makes it smell.
seems to be it appears to get stronger as you come to a stop
Ok so have you checked for the exhaust manifold leaking?
yes we put it on a lift and could not find any leakage at the manifold or at the pipe flange
Did you remove the shield over the exhaust manifold to look? the cranks can be under there.
no I have not removed the shield is this a common problem on this motor
yes, on this it is,
But also the oil cap being loose had been the cause of some .
how is the smell getting into the system is there a intake around the cowl area
The inlet is above the cowl under the right wiper.
I am going to meet my wife for lunch shortly I will check the oil cap and get back to you after
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went and checked the oil cap it looks ok was tight oring looks good