Frequently Asked Questions About GMC General Truck Driving Lights

What years and models of GMC General trucks are these driving lights compatible with?

Our GMC General truck driving lights are designed to fit 1977-1996 GMC General models, including both single and tandem axle configurations. The mounting brackets are specifically engineered for the General's unique bumper and grille design. However, slight modifications may be needed for trucks with aftermarket bumpers or custom front-end modifications. We recommend checking your specific truck's front-end configuration before ordering, as some late 1996 models transitioned to different mounting points.

How difficult is the installation process, and what tools will I need?

Installation typically takes 2-4 hours for someone with basic mechanical skills. You'll need a drill with metal bits (1/4" and 3/8"), a socket set (typically 13mm and 15mm), wire strippers, electrical tape or heat shrink tubing, and a test light or multimeter. The most challenging part is usually running the wiring harness through the firewall - we recommend using an existing grommet or carefully drilling a new hole with a rubber grommet to prevent wire damage. Most lights come with detailed instructions, but having a wiring diagram for your specific year General is helpful.

What's the difference between halogen and LED driving lights for my GMC General?

Halogen lights are more affordable upfront and produce a warm, yellowish light that cuts through fog well, but they draw more power (typically 55-100 watts each) and have shorter lifespans (500-1,000 hours). LED lights cost more initially but use 60-80% less power, last up to 50,000 hours, and produce a brighter, whiter light. For GMC Generals with older alternators, LEDs put less strain on the electrical system. Consider your budget, how often you drive at night, and your alternator's capacity when choosing.

Will these driving lights work with my truck's existing wiring, or do I need to add a relay?

We strongly recommend installing a relay kit with any driving lights over 35 watts per light. Most GMC General trucks' factory wiring isn't designed to handle the additional amperage draw of powerful driving lights. Running high-wattage lights through your existing headlight switch can cause overheating and switch failure. A relay kit (usually $25-40) protects your truck's electrical system and ensures maximum light output. The relay should be mounted in the engine compartment, with power drawn directly from the battery through an inline fuse.

What size and style of driving lights work best on the GMC General's front end?

The GMC General's wide, flat front bumper accommodates various light sizes, but 6-inch or 7-inch round lights are most popular because they complement the truck's classic styling. Rectangular lights (typically 5"x7") also work well and provide a more modern appearance. For mounting, lights can be attached directly to the bumper or using light bars that span between the frame rails. Chrome housings match factory trim, while black housings suit trucks with blacked-out themes. Consider your state's regulations - many limit you to two auxiliary driving lights that must be covered or switched off when using high beams.