06 Envoy Denali engine light after fillup

DerrickG

Original poster
Member
Apr 30, 2013
24
okay guys I have a weird one 2006 envoy Denali with the 5.3 liter engine light comes on after I fill the tank with fuel read the codes comes up with p0174 and p0176I scan the codes clear them in and doesn't come on until the next fill. Whats going on here?
 

jrSS

Member
Dec 4, 2011
3,950
Does it read full after fill up?? There is a tsb on the fuel sending unit on 06 and 07's.
 

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