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The 2011 GMC Sierra-1500 runs on regular unleaded.
inside the fuel tank
The 2011 GMC Sierra-1500-Hybrid runs on regular unleaded.
no outside fuel filter. inside fuel tank part of pump assy.
I own a 1990 GMC Sierra 1500 5.7L V8. My fuel filter is located along the frame rail under the cab on the driver's side of the truck. You might look there for the filter on your 1989 Sierra. It's an inline silver colored canister.
drop the fuel tank. Bummer huh. :)
Behind the driver, inside the left frame beam.
The 1999 GMC 1500 PU equipped with the 5.0L V8 have an undercar in-line EFI filter. The filter is located directly upstream of the fuel tank in the gasoline line going to the engine. The OEM AC Delco replacement fuel filter is #GF652.
its dirrectly under the driver side against the frame rail
The 2014 GMC Sierra-1500 runs on flex-fuel (FFV).
Unfortunately it is built into the fuel pump which is located in the tank. Good luck
gmc 1500 sierra was fuel injected in '92