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2013 Chevrolet Silverado 1500, 5.3 starting issue

gmctruckguy88

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gmctruckguy88 Enthusiast

gmctruckguy88

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Posted

Good evening 

 

Please bare with me...

 

I have a 2013 Chevy Silverado with roughly 80k miles.  I had been getting a bunch of codes with a CEL: MAF, Rich and Lean codes, with an intermittent AFM code (truck not able to switch to 4 cyl).  I took it to the dealer -  they cleaned the MAF/throttle body, replaced a shot oxygen sensor (downstream), did some preventative maintenance and inspected it for about $1k.  Initial driveability issues were better and didnt have any problems.  Took a short trip a week later and ended up with a Misfire on Cyl 1.  I did the easy thing and pulled the spark plug.  The insulator was cracked and shorting out.   I replaced all spark plugs and truck cleared the code and it was driving well.  A week later I began having the odor of gasoline in the cab of my truck.  I called the dealer, when i got it in they diagnosed it with a rusted/corroded fuel pump and a high pressure line.  They got around to fixing it a week later.  I got the call today to come get the truck and took it out, (another $850).  At first it was driving well, but when I got the truck home, it sat in the driveway.  I went to move it after shoveling the snow, where I usually park it and it would barely start.  It stumbled and sounded like it was misfiring across all the cylinders, then turned over and idled with no problems.  I turned the truck off and back on, no issues.  I let it sit for about an hour and started it, no issues.  So it appears it is a cold start issue?  I called the dealer back to tell them it wasn't fixed and what was going on.  New appt on Thursday of this week, but until then, any suggestions/thoughts on what is wrong?

 

Any help is appreciated

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