Jeeps got 'em & so did some Toyota trucks, too.
For 400's, there's 2 styles & 2 factory mounting locations.
The two styles have different screw mount tabs. Clocked differently on the housing according to mounting location.
The break is '88-'94 & '95-'97, although the '95 could be considered a one-year-only as it's the newer style but with the in-line fuse as per the early generation. Apparently GM doesn't list them as an option for '98. (according to Dave, 88GMCtruck. If anyone knows the minute details of these trucks, he's that guy.)
Early models were on the passenger fender. Vortec trucks, inc. '95, on the passenger side firewall.
If your truck didn't come with one, the metal is dimpled where the light gets mounted. Don't drill the holes. Punch 'em.
Drilling removes metal. Punching doesn't. More meat for the screws to glom onto.
But that's only if you want to install in the factory locations. They don't have to be.
Simple install. Constant power & ground.
IIRC, the early ones were wired into the underhood light so that they only worked with the hood open.
On the later versions, forget to turn the light off & 2 days later, dead battery. (Hmmm...how would I know that? Oops.)
The bulb housing retaining tabs get broken easily & the one's with are usually a few bucks more.
Original is a #89 bulb, but a #93 will work. 1156 base. An 18 smd LED with the 1157 base is the largest bulb that'll fit inside the clear plastic housing.
The cord is 18' long.
You must be registered for see images attach
You must be registered for see images attach
Yeeaaa...not a 400, but you get the idea.
You must be registered for see images attach