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Ask Your Question1999 GMC Yukon Denali
Question: Lots of codes , Lots of problems! Need Help or a can of gas and a match!
Question
I got a code P1345 on my OBD II scanner. i went out side started car let warm up for 5 minutes. and all the sudden it just died. now fuel pump wont prime, gettin this code, replaced fuel pump relay and rear o2 sensor on right side(passenger)downstream of cat. converter. It still wont start, will turn over but fuel pump wont prime. the fuel pump was replaced 2 years ago. fuel filter has been replaced 3 times n five years. also 2 years ago i replaced plugs, plug wires, cap, and rotor all got changed. shocks, water pump and intake or exhaust gaskett!!!! nothin but a pain!!! never buy first year model of anything!! bad mistake. got 140,000 miles and got all the common problems with this like rear differential clunking, power steering jerking when u turn just a little, power steering high pressure line leaking, getting bad gas mileage, and losing power, especially when i got my foot in it. here is a few other codes i have had as well. P0161,P0304,P0300,P1345,P0174
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Answer #1
Bret Bodas January 31, 2010, 11:09
MasterThese GM vehicles go through fuel pumps like crazy. I would start by checking the fuel pressure, or if you don't have a fuel pressure gauge, try smacking the bottom of the fuel tank while someone is cranking the engine over, this might get it running temporarily.
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Reply
Visitor, February 27, 2011, 07:48ReplyHave you tried locking and unlocking the doors with the keyfob? May not work for you, but it did for me. I had the same problem and some how the security wanted to shut off the fuel supply and it worked fine after locking and unlocking with the keyfob
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