hard start

hey guys had a question for you, i have a 98 yukon 5.7 4x4. first thing in the morning it will turn over fine and start right up, but after the motor has reached normal operating temp when you turn it off and try to restart it befor it cools it hesitates before it turns over kinda like a low...

Hi all, I have a 2007 Tahoe w/105k. 5.3L. I have made no mods except a K&N air filter. First issue: About 5k miles ago I started to get a P0121 code. After researching this, I came to the conclusion to clean the MAF. I did this, it worked for about a week. I cleaned it again, it worked for...