Question about 2004 GMC Sierra
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Posted on Jan 02, 2017
Depending on the engine size it should be under the to plenium cover. That is the part with the engine name on the top of the motor
Posted on Jan 01, 2010
on the left rear of the engine next to the last ignition coil, connect to a hose that goes up to the rear of throttle body/ upper intake
Posted on Apr 21, 2010
hi, i have seen this problem ten years ago twice, but i was dumbfounded by the answer. all details aside, I replaced the ecm, and never had the problem again with both of them. this repair was a recommended repair by the local truck depot in my town, they stated the ecm got hot along with the truck and it lost the injector sensor signal. now, don't take this solution and run with it, i haven't repaired a 6.2 diesel in ten years and i maybe off track completely. but at least maybe you could ask around your town or maybe a large truck facility about this. of course, you should take to a shop to have diagnosed. hope i could help.
Posted on Jun 07, 2010
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