GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi, I’m Ron and I can help you.I have been in this business since 1975 and also teach automotive repair. I am confidentwe can resolve your problem together. Please understand that I don't know your skilllevel. I can't see, smell, hear, or touch the vehicle either, so it may take a few replies toget to satisfactory results. Please be patient!I also try to give all of the information you may need, expecting a “positive rating” inreturn. I will also continue assisting you after you have rated me, if necessary. If thereis any reason I cannot get a positive rating, please let me know why “in advance”, so Ican go another direction for you. I am sorry you’re having this problem; I’ll help youthrough it.
There are 2 things you need to check, one is the fuel pressure with a gauge and the second is the CRANK sensor. It would be vest if you can get the computer scanned also to read all the PID's and what they are doing when it acts up.