cpitre

2007 Tahoe Stabiltrak flashing off, engine light flashing, error code reading cylinder 4 misfire. Changed spark plugs and fuel injector. I am seeing a lot of people are having similar problems, this is not very encouraging. Any new info on the problem would be appreciated as I cannot afford to bring it in to the dealership.

tech2

try swaping a coil with a good cylinder. if the misfire doesn't follow the coil and stays on number 4. do a compression check. if the compression is zero and you have active fuel management 5.3 engine...cylinder 4 is an afm cylinder....remove the valve cover and see if the rocker arm is moving...if not...the lifter may have collapsed.

Suburban Dude

Good advice above. Also, you might change your oil. Try using a Dexos approved 5-30 engine oil. You have nothing to lose. If it’s a collapsed lifter you are looking at a $2000 tear down to replace the lifters.

SD

MikeP

I have the same issue but with #6. Changed coi, wire and plug. Runs good for about 5 miles then misfire code comes back and runs rough again. Remove the coil wire and put it back and it's good again.2008 Suburban will 97k 5.3. 4wd