2008 Silverado 5.3 fuel pressure drop

[Jsdirt]

That right there is the #1 reason I HATE GM dealerships - DISHONESTY!! I hear so many stories of it, and have experienced it myself first hand.

 

Ahh, yep - exhaust leaks will do that too - forgot about that variable. They annoy the crap out of me too, lol.

 

 

Glad this all worked out good, and glad I could help!

[jegmcsierra]

was there a solution to this problem? I have a 2010 gmc sierra 1500 5.3 with the same issues I've replaced damn near everything this guy has and still having problems except my truck doesn't always demand 55psi+ when in wot.  starts up with 60-70psi then drops to 42-43 after a few minutes truck has ran like this for about a year and a half now I got it back from the stealership after they replaced to much in the timing chain department and its never felt the same since the test drive bought it and 2 minutes after I left the show room it had a check engine light for timing so I brought it back if anyone has any insight on what I could be dealing with I appreciate the help