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H3T 2009 Hummer H3T Alpha Fuel Pump Relay???

mavrikjc

Well-Known Member
Messages
82
Location
Dallas, TX
Ok. This is driving me nuts. Went to Barnwell Mountain and wheeled for 4 days. Tore the sh*t out of my truck (fenders, BA Bumper, gas cap ripped off - yup no idea how I did that - and mirrors and door handles ripped off) but had a blast and was hitting 4 diamond trails, pulling out jeeps and toyos. Man these things really do GO ANYWHERE.

Heading out after 4 days of wheeling, my truck starts "hiccuping" occasionally at high-way speeds. Shortly thereafter, SES light comes on.

Get home and wash off dirt/rocks and check underneath and notice that my fuel line crosses from drivers side to passenger along a crossmember between the frame. Little shi*tty sheet metal bracket connects to cross-member and a rock had got stuck behind it and dislodged the clip. Fuel lines were fine though cause they tuck up above cross member but were swinging in the breeze which I figured could make the Fuel Pressure Sensor angry as they swung loose. Thought this might be it, popped it back in place, reset SES light with OBDII reader. Drove around 30 min - no issues - right as rain.

2 days later, SES light back on - and it is hiccuping again and outright stalling occasionally. Ran it up to trusty mechanic - he says it's throwing a Fuel Pump Relay Issue code.

Call my local Stealership, and they say they can't see that a 2009 H3T Alpha even has a fuel pump relay... Could it be FCM? It seems the H3T Alpha does has a Fuel Control Module behind/near rear bumper (the same rear bumper I also managed to ding sliding back into a tree after backing up to gain speed to hit a steep incline).

So my question is...

1) Do H3T Alpha's have a Fuel Pump Relay?
2) Any freakin idea why my truck is throwing Fuel Pump Primary Circuit (P0230) and Fuel Pump Control Module Requested MIL Illumination (P069E) codes?
 

Bigunit

Hammer Down!
Staff member
Messages
6,561
Location
Arizona
I know it has the fuel system control module but I'm not sure about a fuel pump relay. I'll see if I can find out for you.
 

Bigunit

Hammer Down!
Staff member
Messages
6,561
Location
Arizona
According to the GM Service Manual, it has a fuel tank module that sits on top of the fuel tank and the fuel system control module at you described in your post.
 

mavrikjc

Well-Known Member
Messages
82
Location
Dallas, TX
Great.... Wondering if my issue stems from ripping my gas cap off... Time to trace the gas infill line down to tank and see if anything else is zip tied to that line...

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Sent from my iPhone using Tapatalk
 
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Bigunit

Hammer Down!
Staff member
Messages
6,561
Location
Arizona
I will take and send you some screenshots of the applicable pages of the Service Manual. Hope it helps.
 

5gn-h3t

Well-Known Member
Messages
616
Location
Northeast Pennsyltucky
mavrikjc - Do you still have the spare tire mounted in the factory location? IIRC, the fuel system control module is mounted above the spare and the spare tire acts as a skid plate for it.
 
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