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Re: OK fuel system question 1988 blazer
The fuel pump relay is mounted high on the firewall to the right of retractable light, just left (passenger side) of the center of engine compartment. The tranny dipstick is just below the relay. If your vehicle has a THM 400 then there will be 2 relays located there, one is the downshift relay and the other is the fuel pump relay.
Hope that helps.
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74 K5 Blazer-built 350ci,Turbo 350, NP 205
8 lug Dana 44, GM Corp 14 bolt-4.56 gears, 37" Boggers
89 K5 Blazer-TBI 350, 700r4, NP 208
8 lug Dana 44, GM Corp 14 bolt-4.10 gears, 33" Toyo A/T
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