la122685 Posted January 5, 2013 Report Share Posted January 5, 2013 Just got my truck delivered... And what a MOTHER F*CKER it's been to get it ... That's another story for another time... Well upon shipment of my truck it had the check engine light on... Checked it out today. It's the "knock sensor 2 low voltage" Any ideas on why this would be in? Just a little back story if it helps... From the dealer to the shipping company it had about 350 extra miles on it... Everything was functioning fine. No check engine light, speedometer worked etc. So I'm assuming someone at the shipping company took my truck for a joy ride. Thanks in advance for the help. Quote Link to comment Share on other sites More sharing options...
Blown 346 Posted January 5, 2013 Report Share Posted January 5, 2013 Sounds like someone took it for a spin.... I would bring that up thru the shipping company since the light wasnt on before. You shouldnt be stuck paying for the fix. Thats what the insurance is for. Quote Link to comment Share on other sites More sharing options...
AdamVRed03 Posted January 5, 2013 Report Share Posted January 5, 2013 i had that same thing on my 02 1500 5.3L and it happend after i washed the engine bay. i had replaced the sensor you have to take the intake manifold off and they are in the valley i assume thats its the same on the 6.0. havent had to take it apart yet. If i recall the sensor isnt that much. just becareful when you take the old on out i broke the stud and the clip n the old one when i took it out. Quote Link to comment Share on other sites More sharing options...
la122685 Posted January 5, 2013 Author Report Share Posted January 5, 2013 Ya that's what I'm currently in the process of doing. Of course supervisor is out till Monday. But any particular reason why it would come in? Maybe cuz who ever drove it ragged the f*ck out of the truck? Quote Link to comment Share on other sites More sharing options...
AdamVRed03 Posted January 5, 2013 Report Share Posted January 5, 2013 i had that same thing on my 02 1500 5.3L and it happend after i washed the engine bay. i had replaced the sensor you have to take the intake manifold off and they are in the valley i assume thats its the same on the 6.0. havent had to take it apart yet. If i recall the sensor isnt that much. just becareful when you take the old on out i broke the stud and the clip n the old one when i took it out. Quote Link to comment Share on other sites More sharing options...
la122685 Posted January 5, 2013 Author Report Share Posted January 5, 2013 Ya that's what I'm currently in the process of doing. Of course supervisor is out till Monday. But any particular reason why it would come in? Maybe cuz who ever drove it ragged the f*ck out of the truck? Quote Link to comment Share on other sites More sharing options...
Krambo Posted January 6, 2013 Report Share Posted January 6, 2013 The knock sensor closest to the firewall is either junk or a wire is pinched/broken. If the dealership cleaned the engine bay before delivery, they could have soaked the valley cover and pooled water in the sensor port...common issue. Quote Link to comment Share on other sites More sharing options...
chawkins6789 Posted January 6, 2013 Report Share Posted January 6, 2013 There is a TSB for this. Happened on my 4.8. Calls for you to replace both sensors i believe, the harness, and RTV the seals to the valley cover. It was easy, just time consuming since I broke the sensor off Quote Link to comment Share on other sites More sharing options...
ChevroletCustomerService Posted January 7, 2013 Report Share Posted January 7, 2013 I am sorry to hear about your concernla122685. Feel free to contact me if you need additional assistance. Thank you. Tricia, Chevrolet Customer Service. Quote Link to comment Share on other sites More sharing options...
Aldofashow Posted January 28, 2013 Report Share Posted January 28, 2013 I got the same thing going on hope they both come out without any problems and don't forget to do the wireing harness I've been told they get beat up from the heat so I might use some exhaust wrap to help protect the harness from the heat Quote Link to comment Share on other sites More sharing options...
Bad Bowtie Posted January 30, 2013 Report Share Posted January 30, 2013 i had that same thing on my 02 1500 5.3L and it happend after i washed the engine bay. i had replaced the sensor you have to take the intake manifold off and they are in the valley i assume thats its the same on the 6.0. havent had to take it apart yet. If i recall the sensor isnt that much. just becareful when you take the old on out i broke the stud and the clip n the old one when i took it out. I'd replace BOTH knock sensors & the GM wiring harness, while your under that intake. Also, be sure and use dielectric grease on ALL the connections. The harness isn't too costly either- DO IT. Quote Link to comment Share on other sites More sharing options...
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