My 2008 silverado would not start about a month ago.i had it towed to a garage and they said the fuel pump was bad so i had it replaced.the same day i picked it up it happened again.i had it towed bac
The evos vent solinoid or vent valve,, i forget,,,is stuck open,,, its the one on the intake ,,, drive side towards top and front,, see youtube,,,the evaperating fuel fumes are flooding the engine so it wont start after sitting awhile,,,does the samething on fillups,, try this next time it is a no start,,, hold pedal to floor and keep turning it over til it cranks,no longer than 30 seconds,,the part is only 30 bucks you can change yourself ,,you can clear the engine code if it fixes it by undoing the ground cable off the battery for 30 seconds,,,check the codes befor you delete,,its either the vent valve solionoid, vent valve purge, i cant remember,,, the code are po4** in that range