454ss
01-02-2008, 09:25 PM
Can anyone help? I got a 1995 yukon with a 6.5 in it. A year and a half ago i had a remam put in and it ran good for a month, Then it bent a push rod and nothing else. Well it sat for all this time and 2 weeks ago I got it running again. Ran good for those two weeks. Then today I took my daughter to school and when i got back home it showed codes 29 33 34. Would a bad vacum pump show all these codes or just code 29? Could sitting all this time have ereased the timming settings in the computer? The motor still runs but is louder.