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Old 09-22-2013, 08:36 PM   #1
72MARIO
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1990 Suburban .....Code 42 Help

I just finished installing a new gm crate 5.7 engine in our suburban. I replaced the knock sensor. When I did I used the pink pipe tape around the threads..Could that have isolated the sensor causing a bad ground ?
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair
http://67-72chevytrucks.com/vboard/s...d.php?t=625017
1967 C/20 6.0/4L80 Roofing Truck
1990 V2500 Suburban "Plow Truck"
2005 TAHOE DD
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Old 09-22-2013, 08:43 PM   #2
72MARIO
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Re: 1990 Suburban .....Code 42 Help

here is the beast
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair
http://67-72chevytrucks.com/vboard/s...d.php?t=625017
1967 C/20 6.0/4L80 Roofing Truck
1990 V2500 Suburban "Plow Truck"
2005 TAHOE DD
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Old 09-22-2013, 10:24 PM   #3
mrolds88
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Re: 1990 Suburban .....Code 42 Help

I would say you are correct. Pretty sure they are installed "dry". Since it is pipe thread, it seals itself.
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