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Old 07-04-2020, 01:04 AM   #1
Mavis79
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Join Date: Mar 2016
Location: Wilton IA
Posts: 61
Question Fuel Tank Selector Switch Differences

The 84 K10 in my signature has a TBI 350. When my son bought it I was told that the cheap tank selector switch did not work. The switch will not engage the right (passenger) tank.

Based on my research the 84 would use the “D7003” switch and the 87+ TBI trucks would use the “D7089c”. What is the differences in these switches?
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84 K5 6.2 Diesel/700R4 (Project on hold)
84 K10 Extended Cab 350TBI/TH350
98 C3500HD 6.5/NV4500 Dump
03 Silverado 2500HD 6.6/Allison
07 Ford Escape Hybrid (Commuter)
15 Chevy Impala
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Old 07-04-2020, 09:09 AM   #2
kglowacky
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Join Date: Mar 2020
Location: The Woodlands,Tx
Posts: 560
Re: Fuel Tank Selector Switch Differences

I had the same question awhile back. Looking at the classic truck catalog pictures one is a one piece and one is a switch with a separate bezel. That's all I could find out. I bought the one piece when it arrived it was in a Standerd box brand, It does not look very strong. I have figured out the wiring of it from trial and error. Maybe someone will respond with some more info.
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