In contrast to the USDM GMT400 Silverado, which had a saddle-mounted fuel tank and left-hand filler cap in the front quarter of the pick-up box as a standard fitment, the Argentinian and Brazilian ones had a right-hand filler cap in the rear quarter. In order to save on tooling and reuse much of the parts for the previous generation of the C/K trucks which had already been made in Brazil and Argentina, the tank in the rear overhang was much easier to implement.
Spotting a Harley-Davidson motorcycle is quite usual in my hometown, and they usually are fitted with some aftermarket accessories. One which has caught my attention was this 2005 Sportster 883, adapted with a communicating vessel to serve as a fuel gauge.
Proper fuel gauges in Sportsters were something I never seen so often, let alone in a carburettor-fed one such as this. Even though this setup has the advantage of not requiring any electrical wiring, unlike the fuel gauge kits often found as aftermarket units, I'm not so sure if a similar setup would be legal for use in other vehicles.