I smell a really bad stink coming from the exhaust of my GMC P15 van. It smells like a rotten egg. Apart from that, my engine too sometimes skips and bucks. Are these two somehow connected?
They are signs that your oxygen sensor is no longer functioning well. Basically, your oxygen sensor detects the percentage of oxygen in the exhaust. A breakdown of your oxygen sensor potentially causes your catalytic converter to fail and worse, it may even damage your engine.
When oxygen sensor failure has been determined, the sensor must be replaced. You can do this job yourself as long as it is not completely rotted. You can diagnose the problem yourself if you have in your garage a digital voltmeter or an OBD2 diagnostic tool. If you have none of this tools, you may also use the OBD2 scanner or code reader right on your iPhone or any Smartphone you have at home. If any of these doesn't work, consider replacing part/s. Fortunately, oxygen sensor is one of the easy parts to replace. You can do this yourself, and you will save time and money.
I bought a GMC P15 a year ago. I have had a number of problems with it including current switching of gears at low speeds and hesitation upon acceleration which in turn cause a loud clunking noise from the front of my vehicle. This is the fourth time I have these issues. I know some have got similar complaints. Can anybody help me about these?
A car clicking noise from the front of the vehicle while turning and accelerating is caused by Constant Velocity (CV) Joint failure. Once it is making noise, refrain from adding grease to the damaged joint and simply get rid of the noise. It is possible that you clean the debris out of your CV joint, but this will not stop the noise you have there. The CV joint needs to be replaced.
A tip: if a CV joint is caught early, you can simply replace only the boot and repack it with fresh grease. This is much cheaper compare to replacing the whole thing. The parts are not really that expensive. It is the amount of labor involved. If the CV joint is worn out, it can no longer be repaired; it will have to be replaced with a new or reconditioned part.
The heated seats of my GMC do not heat up. It is very weak, and it barely warms up. How do I determine which of the parts carries this problem?
Did you check simple stuffs like loose connector? This is because sometimes, these problems are connected with them. Possibly, it must also be the heated seat module and it needs to be reprogrammed. For this problem, what you need to do first is to determine if one side or both sides are affected. You need to do troubleshooting in order to detect which part brings this problem. Consider checking the following. If one side is okay and the other is not working at all, it could be that the switch module in the door panel is probably toasted. Now, if one side is okay and the other works but only for minutes then shuts off, chances are you just need to replace the heating pad on the bad side. And lastly, if both sides annoy you, you try moving the seats using the power seat controls. If the seats just move in, fit, and start, then it has something to do with a shorted sensor somewhere.