Yup, mine was kinda hidden in a similar place. It was behind the grille, tucked under the windshield washer fluid cannister. If you look sorta behind and slightly back of the oil filter you'll see a knurled alum. knob with the wire attached to it, just follow it to the end and feed the plug out through the grill.
------------------
93. 5 D250 4X4,HD Spring Pkg, Rancho 7000's, Rear Swaybar, Dual Shock Front Stabilizer, BD Injectors, 3" Mandrel bent exhaust, 16cm 'Hot End', Modest Pump Tweaks/Timed, K&N Air, Isspro Pyro,Tach,transmission Temp, Auto Meter Oil Filled
Boost Ga. , 3:54's, 4 Speed Auto, Clubcab, Aftermarket Reclining Buckets w/ctr Drop Down seat/console, Black over Silver, 21psi,285-75R-16's,American Racing Clear Coat Mags, Amsoil 15W-40HD Marine, 12,000 lb. Warn Winch, KC Spots.
97,000 Kms.