Thechevyman122

iTrader: (3)

alright guys well i got a new battery that took care of my cold start problem..yesterday my cel came on, truck seems to be running just fine. gave onstar a call they said the light was for identical messages my left and right bank were running lean. same message i got a long time ago with my truck for a leak in my intake tube, where a hose clamp slipped off. so i figured thats what it was, checked and my volant is snug as can be, no leaks to be found. What else could throw this message?

viciousknid

iTrader: (8)

What's the actual code? do you know?

Thechevyman122

iTrader: (3)

no i guess i need to go get it checked. ill get back with you guys when i do.

budhayes3

iTrader: (19)

Alot of things can cause lean codes, such as a vacuum leak, failing fuel pump, fuel filter...bad or dirty MAF sensors have been known to trip lean codes also...

Hawk179

iTrader: (1)

Tuning if not spot on can do it.

R

Thechevyman122

iTrader: (3)

i havent had a problem at all untill now so i think i can rule out tuning. Im getting the exact code tomorow...i really think its a failing fuel pump, dirty Maf sensor maybe. Its just weird because my truck seems to be running perfectly...i thought maybe it was a vacuum leak, but my cold air is snug tight everywhere no problems. Where is the fuel fitler on my truck? i was under the impression i didnt have an inline. Im getting the code read in the morning ill get back by 1230 or so. Thanks for all yalls help

budhayes3

iTrader: (19)

Pretty sure that the fuel filter, on an 03, is on the driver's side frame rail, behind the driver's door area...

BigCountryx

iTrader: (3)

leaking intake manifold gaskets will do it

outlawz2004

iTrader: (18)

I think 03 up is in the tank. I know on my 04 its inside.

Grumpy5.3

iTrader: (14)

03 is on frame rail, 04 is in tank....


If you have it running and run some water around the base of the intake and it starts skipping, you need intake gaskets