I have a problem with my 2007 GMC Yukon Denali 6.2 l, I'm not sure if I'm on the right part of this group so if I am in the wrong part please let me know I have a problem with my truck it wants to start pretty decently when it's cooler outside however when it gets hot I have to press on the gas pedal to get it to start I just had 4,200 worth of work done to it camshaft sensor timing chain timing gear rear main seal etc. I honestly don't think it's the fuel pump but I don't know any help would be appreciated.
2007 GMC Yukon Denali 6.2
- Thread starter j_jerry79
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You could have a purge solenoid for the fuel system that is stuck open. This can a mimic a flooded engine situation. Replace with OEM only in my opinion.
Check the throttle body for excessive carbon buildup as well. If you see a black ring around the plate, then brush its teeth with some carb and choke cleaner, an old toothbrush, and wipe clean with a rag. Best is to relearn with bi-directional scanner when done, but if you don't have one, then let it idle in park for 3 minutes, in gear for 3 minutes with foot on the brake, and repeat with the A/C on. I know there's an exact procedure in a manual, but that's what I've done in the past to let the computer relearn the base airflow. Then drive it and it will figure out the rest.
Check the throttle body for excessive carbon buildup as well. If you see a black ring around the plate, then brush its teeth with some carb and choke cleaner, an old toothbrush, and wipe clean with a rag. Best is to relearn with bi-directional scanner when done, but if you don't have one, then let it idle in park for 3 minutes, in gear for 3 minutes with foot on the brake, and repeat with the A/C on. I know there's an exact procedure in a manual, but that's what I've done in the past to let the computer relearn the base airflow. Then drive it and it will figure out the rest.
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Welcome to the Forum from NH.
Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.
I hope that you will become a participating member in the Forum's discussions.
Pics of the truck, please. If we can't see it, it does not exist.
You are already receiving sage advice from the knowledgeable folks on this Forum.
As suggested above, do you have, or have access to, a quality bi-directional scanner? If not, I recommend that you get yourself a quality bi-directional scanner to add to your tool box. Then, you will be able to read ALL trouble codes, along with a brief explanation/pointer to the source of your issue. You can test many of the truck's electronic functions with the scanner, in order to determine the source of an issue. You will also be able to reset/delete trouble codes, after taking corrective action. You will literally save thousands of dollars in diagnostic and repair costs over the life of your truck, and you will most likely recoup the cost of the scanner within 1 year.
Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.
I hope that you will become a participating member in the Forum's discussions.
Pics of the truck, please. If we can't see it, it does not exist.
You are already receiving sage advice from the knowledgeable folks on this Forum.
As suggested above, do you have, or have access to, a quality bi-directional scanner? If not, I recommend that you get yourself a quality bi-directional scanner to add to your tool box. Then, you will be able to read ALL trouble codes, along with a brief explanation/pointer to the source of your issue. You can test many of the truck's electronic functions with the scanner, in order to determine the source of an issue. You will also be able to reset/delete trouble codes, after taking corrective action. You will literally save thousands of dollars in diagnostic and repair costs over the life of your truck, and you will most likely recoup the cost of the scanner within 1 year.
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